Merge "Added information on plugin mechanism to glossary"

Unicode type resource state is now handled in the same fashion as resource state specified by general string.

Change-Id: I35ffa09015283b51c935515436735aecbe83a9d6
Closes-Bug: #1565764

.gitignore

@@ -43,6 +43,9 @@ output/*/index.html
 
 # Sphinx
 doc/build
+doc/source/api
+doc/source/samples
+doc/source/watcher.conf.sample
 
 # pbr generates these
 AUTHORS

README.rst

@@ -10,12 +10,12 @@ Watcher
 
 OpenStack Watcher provides a flexible and scalable resource optimization
 service for multi-tenant OpenStack-based clouds.
-Watcher provides a complete optimization loop—including everything from a
+Watcher provides a complete optimization loop-including everything from a
 metrics receiver, complex event processor and profiler, optimization processor
 and an action plan applier. This provides a robust framework to realize a wide
 range of cloud optimization goals, including the reduction of data center
 operating costs, increased system performance via intelligent virtual machine
-migration, increased energy efficiency—and more!
+migration, increased energy efficiency-and more!
 
 * Free software: Apache license
 * Wiki: http://wiki.openstack.org/wiki/Watcher

devstack/lib/watcher

@@ -0,0 +1,246 @@
+#!/bin/bash
+#
+# lib/watcher
+# Functions to control the configuration and operation of the watcher services
+
+# Dependencies:
+#
+# - ``functions`` file
+# - ``SERVICE_{TENANT_NAME|PASSWORD}`` must be defined
+# - ``DEST``, ``DATA_DIR``, ``STACK_USER`` must be defined
+
+# ``stack.sh`` calls the entry points in this order:
+#
+# - is_watcher_enabled
+# - install_watcher
+# - configure_watcher
+# - create_watcher_conf
+# - init_watcher
+# - start_watcher
+# - stop_watcher
+# - cleanup_watcher
+
+# Save trace setting
+_XTRACE_WATCHER=$(set +o | grep xtrace)
+set +o xtrace
+
+
+# Defaults
+# --------
+
+# Set up default directories
+WATCHER_REPO=${WATCHER_REPO:-${GIT_BASE}/openstack/watcher.git}
+WATCHER_BRANCH=${WATCHER_BRANCH:-master}
+WATCHER_DIR=$DEST/watcher
+
+GITREPO["python-watcherclient"]=${WATCHERCLIENT_REPO:-${GIT_BASE}/openstack/python-watcherclient.git}
+GITBRANCH["python-watcherclient"]=${WATCHERCLIENT_BRANCH:-master}
+GITDIR["python-watcherclient"]=$DEST/python-watcherclient
+
+WATCHER_STATE_PATH=${WATCHER_STATE_PATH:=$DATA_DIR/watcher}
+WATCHER_AUTH_CACHE_DIR=${WATCHER_AUTH_CACHE_DIR:-/var/cache/watcher}
+
+WATCHER_CONF_DIR=/etc/watcher
+WATCHER_CONF=$WATCHER_CONF_DIR/watcher.conf
+WATCHER_POLICY_JSON=$WATCHER_CONF_DIR/policy.json
+
+if is_ssl_enabled_service "watcher" || is_service_enabled tls-proxy; then
+    WATCHER_SERVICE_PROTOCOL="https"
+fi
+
+# Public facing bits
+WATCHER_SERVICE_HOST=${WATCHER_SERVICE_HOST:-$HOST_IP}
+WATCHER_SERVICE_PORT=${WATCHER_SERVICE_PORT:-9322}
+WATCHER_SERVICE_PORT_INT=${WATCHER_SERVICE_PORT_INT:-19322}
+WATCHER_SERVICE_PROTOCOL=${WATCHER_SERVICE_PROTOCOL:-$SERVICE_PROTOCOL}
+
+# Support entry points installation of console scripts
+if [[ -d $WATCHER_DIR/bin ]]; then
+    WATCHER_BIN_DIR=$WATCHER_DIR/bin
+else
+    WATCHER_BIN_DIR=$(get_python_exec_prefix)
+fi
+
+# Entry Points
+# ------------
+
+# Test if any watcher services are enabled
+# is_watcher_enabled
+function is_watcher_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"watcher-" ]] && return 0
+    return 1
+}
+
+# cleanup_watcher() - Remove residual data files, anything left over from previous
+# runs that a clean run would need to clean up
+function cleanup_watcher {
+    sudo rm -rf $WATCHER_STATE_PATH $WATCHER_AUTH_CACHE_DIR
+}
+
+# configure_watcher() - Set config files, create data dirs, etc
+function configure_watcher {
+    # Put config files in ``/etc/watcher`` for everyone to find
+    sudo install -d -o $STACK_USER $WATCHER_CONF_DIR
+
+    install_default_policy watcher
+
+    # Rebuild the config file from scratch
+    create_watcher_conf
+}
+
+# create_watcher_accounts() - Set up common required watcher accounts
+#
+# Project              User         Roles
+# ------------------------------------------------------------------
+# SERVICE_TENANT_NAME  watcher      service
+function create_watcher_accounts {
+    create_service_user "watcher" "admin"
+
+    local watcher_service=$(get_or_create_service "watcher" \
+        "infra-optim" "Watcher Infrastructure Optimization Service")
+    get_or_create_endpoint $watcher_service \
+        "$REGION_NAME" \
+        "$WATCHER_SERVICE_PROTOCOL://$WATCHER_SERVICE_HOST:$WATCHER_SERVICE_PORT" \
+        "$WATCHER_SERVICE_PROTOCOL://$WATCHER_SERVICE_HOST:$WATCHER_SERVICE_PORT" \
+        "$WATCHER_SERVICE_PROTOCOL://$WATCHER_SERVICE_HOST:$WATCHER_SERVICE_PORT"
+}
+
+# create_watcher_conf() - Create a new watcher.conf file
+function create_watcher_conf {
+    # (Re)create ``watcher.conf``
+    rm -f $WATCHER_CONF
+
+    iniset $WATCHER_CONF DEFAULT debug "$ENABLE_DEBUG_LOG_LEVEL"
+    iniset $WATCHER_CONF DEFAULT control_exchange watcher
+
+    iniset $WATCHER_CONF database connection $(database_connection_url watcher)
+    iniset $WATCHER_CONF api host "$WATCHER_SERVICE_HOST"
+    iniset $WATCHER_CONF api port "$WATCHER_SERVICE_PORT"
+
+    iniset $WATCHER_CONF oslo_policy policy_file $WATCHER_POLICY_JSON
+
+    iniset $WATCHER_CONF oslo_messaging_rabbit rabbit_userid $RABBIT_USERID
+    iniset $WATCHER_CONF oslo_messaging_rabbit rabbit_password $RABBIT_PASSWORD
+    iniset $WATCHER_CONF oslo_messaging_rabbit rabbit_host $RABBIT_HOST
+
+    configure_auth_token_middleware $WATCHER_CONF watcher $WATCHER_AUTH_CACHE_DIR
+    configure_auth_token_middleware $WATCHER_CONF watcher $WATCHER_AUTH_CACHE_DIR "watcher_clients_auth"
+
+    if is_fedora || is_suse; then
+        # watcher defaults to /usr/local/bin, but fedora and suse pip like to
+        # install things in /usr/bin
+        iniset $WATCHER_CONF DEFAULT bindir "/usr/bin"
+    fi
+
+    if [ -n "$WATCHER_STATE_PATH" ]; then
+        iniset $WATCHER_CONF DEFAULT state_path "$WATCHER_STATE_PATH"
+        iniset $WATCHER_CONF oslo_concurrency lock_path "$WATCHER_STATE_PATH"
+    fi
+
+    if [ "$SYSLOG" != "False" ]; then
+        iniset $WATCHER_CONF DEFAULT use_syslog "True"
+    fi
+
+    # Format logging
+    if [ "$LOG_COLOR" == "True" ] && [ "$SYSLOG" == "False" ]; then
+        setup_colorized_logging $WATCHER_CONF DEFAULT
+    else
+        # Show user_name and project_name instead of user_id and project_id
+        iniset $WATCHER_CONF DEFAULT logging_context_format_string "%(asctime)s.%(msecs)03d %(levelname)s %(name)s [%(request_id)s %(user_name)s %(project_name)s] %(instance)s%(message)s"
+    fi
+
+    # Register SSL certificates if provided
+    if is_ssl_enabled_service watcher; then
+        ensure_certificates WATCHER
+
+        iniset $WATCHER_CONF DEFAULT ssl_cert_file "$WATCHER_SSL_CERT"
+        iniset $WATCHER_CONF DEFAULT ssl_key_file "$WATCHER_SSL_KEY"
+
+        iniset $WATCHER_CONF DEFAULT enabled_ssl_apis "$WATCHER_ENABLED_APIS"
+    fi
+
+    if is_service_enabled ceilometer; then
+        iniset $WATCHER_CONF watcher_messaging notifier_driver "messaging"
+    fi
+}
+
+# create_watcher_cache_dir() - Part of the init_watcher() process
+function create_watcher_cache_dir {
+    # Create cache dir
+    sudo install -d -o $STACK_USER $WATCHER_AUTH_CACHE_DIR
+    rm -rf $WATCHER_AUTH_CACHE_DIR/*
+}
+
+# init_watcher() - Initialize databases, etc.
+function init_watcher {
+    # clean up from previous (possibly aborted) runs
+    # create required data files
+    if is_service_enabled $DATABASE_BACKENDS && is_service_enabled watcher-api; then
+        # (Re)create watcher database
+        recreate_database watcher
+
+        # Create watcher schema
+        $WATCHER_BIN_DIR/watcher-db-manage --config-file $WATCHER_CONF create_schema
+    fi
+    create_watcher_cache_dir
+}
+
+# install_watcherclient() - Collect source and prepare
+function install_watcherclient {
+    if use_library_from_git "python-watcherclient"; then
+        git_clone_by_name "python-watcherclient"
+        setup_dev_lib "python-watcherclient"
+    fi
+}
+
+# install_watcher() - Collect source and prepare
+function install_watcher {
+    git_clone $WATCHER_REPO $WATCHER_DIR $WATCHER_BRANCH
+    setup_develop $WATCHER_DIR
+}
+
+# start_watcher_api() - Start the API process ahead of other things
+function start_watcher_api {
+    # Get right service port for testing
+    local service_port=$WATCHER_SERVICE_PORT
+    local service_protocol=$WATCHER_SERVICE_PROTOCOL
+    if is_service_enabled tls-proxy; then
+        service_port=$WATCHER_SERVICE_PORT_INT
+        service_protocol="http"
+    fi
+
+    run_process watcher-api "$WATCHER_BIN_DIR/watcher-api --config-file $WATCHER_CONF"
+    echo "Waiting for watcher-api to start..."
+    if ! wait_for_service $SERVICE_TIMEOUT $service_protocol://$WATCHER_SERVICE_HOST:$service_port; then
+        die $LINENO "watcher-api did not start"
+    fi
+
+    # Start proxies if enabled
+    if is_service_enabled tls-proxy; then
+        start_tls_proxy '*' $WATCHER_SERVICE_PORT $WATCHER_SERVICE_HOST $WATCHER_SERVICE_PORT_INT &
+        start_tls_proxy '*' $EC2_SERVICE_PORT $WATCHER_SERVICE_HOST $WATCHER_SERVICE_PORT_INT &
+    fi
+}
+
+# start_watcher() - Start running processes, including screen
+function start_watcher {
+    # ``run_process`` checks ``is_service_enabled``, it is not needed here
+    start_watcher_api
+    run_process watcher-decision-engine "$WATCHER_BIN_DIR/watcher-decision-engine --config-file $WATCHER_CONF"
+    run_process watcher-applier "$WATCHER_BIN_DIR/watcher-applier --config-file $WATCHER_CONF"
+}
+
+# stop_watcher() - Stop running processes (non-screen)
+function stop_watcher {
+    for serv in watcher-api watcher-decision-engine watcher-applier; do
+        stop_process $serv
+    done
+}
+
+# Restore xtrace
+$_XTRACE_WATCHER
+
+# Tell emacs to use shell-script-mode
+## Local variables:
+## mode: shell-script
+## End:

devstack/local.conf.compute

@@ -0,0 +1,46 @@
+# Sample ``local.conf`` for compute node for Watcher development
+# NOTE: Copy this file to the root DevStack directory for it to work properly.
+
+[[local|localrc]]
+
+ADMIN_PASSWORD=nomoresecrete
+DATABASE_PASSWORD=stackdb
+RABBIT_PASSWORD=stackqueue
+SERVICE_PASSWORD=$ADMIN_PASSWORD
+SERVICE_TOKEN=azertytoken
+
+HOST_IP=192.168.42.2 # Change this to this compute node's IP address
+FLAT_INTERFACE=eth0
+
+FIXED_RANGE=10.254.1.0/24 # Change this to whatever your network is
+NETWORK_GATEWAY=10.254.1.1 # Change this for your network
+
+MULTI_HOST=1
+
+SERVICE_HOST=192.168.42.1 # Change this to the IP of your controller node
+MYSQL_HOST=$SERVICE_HOST
+RABBIT_HOST=$SERVICE_HOST
+GLANCE_HOSTPORT=${SERVICE_HOST}:9292
+
+DATABASE_TYPE=mysql
+
+# Enable services (including neutron)
+ENABLED_SERVICES=n-cpu,n-api-meta,c-vol,q-agt
+
+NOVA_VNC_ENABLED=True
+NOVNCPROXY_URL="http://$SERVICE_HOST:6080/vnc_auto.html"
+VNCSERVER_LISTEN=0.0.0.0
+VNCSERVER_PROXYCLIENT_ADDRESS=$HOST_IP
+
+NOVA_INSTANCES_PATH=/opt/stack/data/instances
+
+# Enable the Ceilometer plugin for the compute agent
+enable_plugin ceilometer git://git.openstack.org/openstack/ceilometer
+disable_service ceilometer-acentral,ceilometer-collector,ceilometer-api
+
+LOGFILE=$DEST/logs/stack.sh.log
+LOGDAYS=2
+
+[[post-config|$NOVA_CONF]]
+[DEFAULT]
+compute_monitors=cpu.virt_driver

devstack/local.conf.controller

@@ -0,0 +1,48 @@
+# Sample ``local.conf`` for controller node for Watcher development
+# NOTE: Copy this file to the root DevStack directory for it to work properly.
+
+[[local|localrc]]
+
+ADMIN_PASSWORD=nomoresecrete
+DATABASE_PASSWORD=stackdb
+RABBIT_PASSWORD=stackqueue
+SERVICE_PASSWORD=$ADMIN_PASSWORD
+SERVICE_TOKEN=azertytoken
+
+HOST_IP=192.168.42.1 # Change this to your controller node IP address
+FLAT_INTERFACE=eth0
+
+FIXED_RANGE=10.254.1.0/24 # Change this to whatever your network is
+NETWORK_GATEWAY=10.254.1.1 # Change this for your network
+
+MULTI_HOST=1
+
+# This is the controller node, so disable nova-compute
+disable_service n-cpu
+
+# Disable nova-network and use neutron instead
+disable_service n-net
+ENABLED_SERVICES+=,q-svc,q-dhcp,q-meta,q-agt,q-l3,neutron
+
+# Enable remote console access
+enable_service n-cauth
+
+# Enable the Watcher plugin
+enable_plugin watcher git://git.openstack.org/openstack/watcher
+
+# Enable the Ceilometer plugin
+enable_plugin ceilometer git://git.openstack.org/openstack/ceilometer
+
+# This is the controller node, so disable the ceilometer compute agent
+disable_service ceilometer-acompute
+
+LOGFILE=$DEST/logs/stack.sh.log
+LOGDAYS=2
+
+[[post-config|$NOVA_CONF]]
+[DEFAULT]
+compute_monitors=cpu.virt_driver
+
+[[post-config|$WATCHER_CONF]]
+[watcher_goals]
+goals=BASIC_CONSOLIDATION:basic,DUMMY:dummy

devstack/plugin.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+#
+# plugin.sh - DevStack plugin script to install watcher
+
+# Save trace setting
+_XTRACE_WATCHER_PLUGIN=$(set +o | grep xtrace)
+set -o xtrace
+
+echo_summary "watcher's plugin.sh was called..."
+source $DEST/watcher/devstack/lib/watcher
+
+# Show all of defined environment variables
+(set -o posix; set)
+
+if is_service_enabled watcher-api watcher-decision-engine watcher-applier; then
+    if [[ "$1" == "stack" && "$2" == "pre-install" ]]; then
+        echo_summary "Before Installing watcher"
+    elif [[ "$1" == "stack" && "$2" == "install" ]]; then
+        echo_summary "Installing watcher"
+        install_watcher
+
+        LIBS_FROM_GIT="${LIBS_FROM_GIT},python-watcherclient"
+
+        install_watcherclient
+        cleanup_watcher
+    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+        echo_summary "Configuring watcher"
+        configure_watcher
+
+        if is_service_enabled key; then
+            create_watcher_accounts
+        fi
+
+    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+        # Initialize watcher
+        init_watcher
+
+        # Start the watcher components
+        echo_summary "Starting watcher"
+        start_watcher
+    fi
+
+    if [[ "$1" == "unstack" ]]; then
+        stop_watcher
+    fi
+
+    if [[ "$1" == "clean" ]]; then
+        cleanup_watcher
+    fi
+fi
+
+# Restore xtrace
+$_XTRACE_WATCHER_PLUGIN

devstack/settings

@@ -0,0 +1,9 @@
+# DevStack settings
+
+# Make sure rabbit is enabled
+enable_service rabbit
+
+# Enable Watcher services
+enable_service watcher-api
+enable_service watcher-decision-engine
+enable_service watcher-applier

doc/source/architecture.rst

@@ -34,8 +34,8 @@ Components
 AMQP Bus
 --------
 
-The AMQP message bus handles asynchronous communications between the different
+The AMQP message bus handles internal asynchronous communications between the
-Watcher components.
+different Watcher components.
 
 .. _cluster_history_db_definition:
 
@@ -51,7 +51,15 @@ MongoDB,...) but will probably be more performant when using
 which are optimized for handling time series data, which are arrays of numbers
 indexed by time (a datetime or a datetime range).
 
-.. _watcher_api_definition:
+.. _cluster_model_db_definition:
+
+Cluster Model Database
+------------------------
+
+This component stores the data related to the
+:ref:`Cluster Data Model <cluster_data_model_definition>`.
+
+.. _archi_watcher_api_definition:
 
 Watcher API
 -----------
@@ -63,13 +71,13 @@ It enables the :ref:`Administrator <administrator_definition>` of a
 :ref:`Cluster <cluster_definition>` to control and monitor the Watcher system
 via any interaction mechanism connected to this API:
 
--   :ref:`CLI <watcher_cli_definition>`
+-   :ref:`CLI <archi_watcher_cli_definition>`
 -   Horizon plugin
 -   Python SDK
 
 You can also read the detailed description of `Watcher API`_.
 
-.. _watcher_applier_definition:
+.. _archi_watcher_applier_definition:
 
 Watcher Applier
 ---------------
@@ -111,7 +119,7 @@ If the :ref:`Action <action_definition>` fails, the
 previous state of the :ref:`Managed resource <managed_resource_definition>`
 (i.e. before the command was sent to the underlying OpenStack service).
 
-.. _watcher_cli_definition:
+.. _archi_watcher_cli_definition:
 
 Watcher CLI
 -----------
@@ -119,16 +127,28 @@ Watcher CLI
 The watcher command-line interface (CLI) can be used to interact with the
 Watcher system in order to control it or to know its current status.
 
-Please, read `the detailed documentation about Watcher CLI <https://factory.b-com.com/www/watcher/doc/python-watcherclient/>`_
+Please, read `the detailed documentation about Watcher CLI
+<https://factory.b-com.com/www/watcher/doc/python-watcherclient/>`_.
 
-.. _watcher_database_definition:
+.. _archi_watcher_dashboard_definition:
+
+Watcher Dashboard
+-----------------
+
+The Watcher Dashboard can be used to interact with the Watcher system through
+Horizon in order to control it or to know its current status.
+
+Please, read `the detailed documentation about Watcher Dashboard
+<https://factory.b-com.com/www/watcher/doc/watcher-dashboard/>`_.
+
+.. _archi_watcher_database_definition:
 
 Watcher Database
 ----------------
 
 This database stores all the Watcher domain objects which can be requested
-by the :ref:`Watcher API <watcher_api_definition>` or the
+by the :ref:`Watcher API <archi_watcher_api_definition>` or the
-:ref:`Watcher CLI <watcher_cli_definition>`:
+:ref:`Watcher CLI <archi_watcher_cli_definition>`:
 
 -  :ref:`Audit templates <audit_template_definition>`
 -  :ref:`Audits <audit_definition>`
@@ -139,7 +159,7 @@ by the :ref:`Watcher API <watcher_api_definition>` or the
 The Watcher domain being here "*optimization of some resources provided by an
 OpenStack system*".
 
-.. _watcher_decision_engine_definition:
+.. _archi_watcher_decision_engine_definition:
 
 Watcher Decision Engine
 -----------------------
@@ -159,7 +179,7 @@ The :ref:`Strategy <strategy_definition>` is then dynamically loaded (via
 `stevedore <https://github.com/openstack/stevedore/>`_). The
 :ref:`Watcher Decision Engine <watcher_decision_engine_definition>` calls the
 **execute()** method of the :ref:`Strategy <strategy_definition>` class which
-generates a set of :ref:`Actions <action_definition>`.
+generates a solution composed of a set of :ref:`Actions <action_definition>`.
 
 These :ref:`Actions <action_definition>` are scheduled in time by the
 :ref:`Watcher Planner <watcher_planner_definition>` (i.e., it generates an
@@ -169,14 +189,244 @@ In order to compute the potential :ref:`Solution <solution_definition>` for the
 Audit, the :ref:`Strategy <strategy_definition>` relies on two sets of data:
 
 -   the current state of the
-:ref:`Managed resources <managed_resource_definition>`
+    :ref:`Managed resources <managed_resource_definition>`
-(e.g., the data stored in the Nova database)
+    (e.g., the data stored in the Nova database)
 -   the data stored in the
-:ref:`Cluster History Database <cluster_history_db_definition>`
+    :ref:`Cluster History Database <cluster_history_db_definition>`
     which provides information about the past of the
     :ref:`Cluster <cluster_definition>`
 
 So far, only one :ref:`Strategy <strategy_definition>` can be associated to a
 given :ref:`Goal <goal_definition>` via the main Watcher configuration file.
 
+.. _data_model:
+
+Data model
+==========
+
+The following diagram shows the data model of Watcher, especially the
+functional dependency of objects from the actors (Admin, Customer) point of
+view (Goals, Audits, Action Plans, ...):
+
+.. image:: ./images/functional_data_model.svg
+   :width: 100%
+
+.. _sequence_diagrams:
+
+Sequence diagrams
+=================
+
+The following paragraph shows the messages exchanged between the different
+components of Watcher for the most often used scenarios.
+
+.. _sequence_diagrams_create_audit_template:
+
+Create a new Audit Template
+---------------------------
+
+The :ref:`Administrator <administrator_definition>` first creates an
+:ref:`Audit template <audit_template_definition>` providing at least the
+following parameters:
+
+-   A name
+-   A goal to achieve
+
+.. image:: ./images/sequence_create_audit_template.png
+   :width: 100%
+
+The `Watcher API`_  just makes sure that the goal exists (i.e. it is declared
+in the Watcher configuration file) and stores a new audit template in the
+:ref:`Watcher Database <watcher_database_definition>`.
+
+.. _sequence_diagrams_create_and_launch_audit:
+
+Create and launch a new Audit
+-----------------------------
+
+The :ref:`Administrator <administrator_definition>` can then launch a new
+:ref:`Audit <audit_definition>` by providing at least the unique UUID of the
+previously created :ref:`Audit template <audit_template_definition>`:
+
+.. image:: ./images/sequence_create_and_launch_audit.png
+   :width: 100%
+
+A message is sent on the :ref:`AMQP bus <amqp_bus_definition>` which triggers
+the Audit in the
+:ref:`Watcher Decision Engine <watcher_decision_engine_definition>`:
+
+.. image:: ./images/sequence_trigger_audit_in_decision_engine.png
+   :width: 100%
+
+The :ref:`Watcher Decision Engine <watcher_decision_engine_definition>` reads
+the Audit parameters from the
+:ref:`Watcher Database <watcher_database_definition>`. It instantiates the
+appropriate :ref:`Strategy <strategy_definition>` (using entry points)
+associated to the :ref:`Goal <goal_definition>` of the
+:ref:`Audit <audit_definition>` (it uses the information of the Watcher
+configuration file to find the mapping between the
+:ref:`Goal <goal_definition>` and the :ref:`Strategy <strategy_definition>`
+python class).
+
+The :ref:`Watcher Decision Engine <watcher_decision_engine_definition>` also
+builds the :ref:`Cluster Data Model <cluster_data_model_definition>`. This
+data model is needed by the :ref:`Strategy <strategy_definition>` to know the
+current state and topology of the audited
+:ref:`Openstack cluster <cluster_definition>`.
+
+The :ref:`Watcher Decision Engine <watcher_decision_engine_definition>` calls
+the **execute()** method of the instantiated
+:ref:`Strategy <strategy_definition>` and provides the data model as an input
+parameter. This method computes a :ref:`Solution <strategy_definition>` to
+achieve the goal and returns it to the
+:ref:`Decision Engine <watcher_decision_engine_definition>`. At this point,
+actions are not scheduled yet.
+
+The :ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
+dynamically loads the :ref:`Watcher Planner <watcher_planner_definition>`
+implementation which is configured in Watcher (via entry points) and calls the
+**schedule()** method of this class with the solution as an input parameter.
+This method finds an appropriate scheduling of
+:ref:`Actions <action_definition>` taking into account some scheduling rules
+(such as priorities between actions).
+It generates a new :ref:`Action Plan <action_plan_definition>` with status
+**RECOMMENDED** and saves it into the
+:ref:`Watcher Database <watcher_database_definition>`. The saved action plan is
+now a scheduled flow of actions.
+
+If every step executed successfully, the
+:ref:`Watcher Decision Engine <watcher_decision_engine_definition>` updates
+the current status of the Audit to **SUCCEEDED** in the
+:ref:`Watcher Database <watcher_database_definition>` and sends a notification
+on the bus to inform other components that the :ref:`Audit <audit_definition>`
+was successful.
+
+
+.. _sequence_diagrams_launch_action_plan:
+
+Launch Action Plan
+------------------
+
+The :ref:`Administrator <administrator_definition>` can then launch the
+recommended :ref:`Action Plan <action_plan_definition>`:
+
+.. image:: ./images/sequence_launch_action_plan.png
+   :width: 100%
+
+A message is sent on the :ref:`AMQP bus <amqp_bus_definition>` which triggers
+the :ref:`Action Plan <action_plan_definition>` in the
+:ref:`Watcher Applier <watcher_applier_definition>`:
+
+.. image:: ./images/sequence_launch_action_plan_in_applier.png
+   :width: 100%
+
+The :ref:`Watcher Applier <watcher_applier_definition>` will get the
+description of the flow of :ref:`Actions <action_definition>` from the
+:ref:`Watcher Database <watcher_database_definition>` and for each
+:ref:`Action <action_definition>` it will instantiate a corresponding
+:ref:`Action <action_definition>` handler python class.
+
+The :ref:`Watcher Applier <watcher_applier_definition>` will then call the
+following methods of the :ref:`Action <action_definition>` handler:
+
+-   **validate_parameters()**: this method will make sure that all the
+    provided input parameters are valid:
+
+    -   If all parameters are valid, the Watcher Applier moves on to the next
+        step.
+    -   If it is not, an error is raised and the action is not executed. A
+        notification is sent on the bus informing other components of the
+        failure.
+
+-   **preconditions()**: this method will make sure that all conditions are met
+    before executing the action (for example, it makes sure that an instance
+    still exists before trying to migrate it).
+-   **execute()**: this method is what triggers real commands on other
+    OpenStack services (such as Nova, ...) in order to change target resource
+    state. If the action is successfully executed, a notification message is
+    sent on the bus indicating that the new state of the action is
+    **SUCCEEDED**.
+
+If every action of the action flow has been executed successfully, a
+notification is sent on the bus to indicate that the whole
+:ref:`Action Plan <action_plan_definition>` has **SUCCEEDED**.
+
+
+.. _state_machine_diagrams:
+
+State Machine diagrams
+======================
+
+.. _audit_state_machine:
+
+Audit State Machine
+-------------------
+
+An :ref:`Audit <audit_definition>` has a life-cycle and its current state may
+be one of the following:
+
+-  **PENDING** : a request for an :ref:`Audit <audit_definition>` has been
+   submitted (either manually by the
+   :ref:`Administrator <administrator_definition>` or automatically via some
+   event handling mechanism) and is in the queue for being processed by the
+   :ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
+-  **ONGOING** : the :ref:`Audit <audit_definition>` is currently being
+   processed by the
+   :ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
+-  **SUCCEEDED** : the :ref:`Audit <audit_definition>` has been executed
+   successfully and at least one solution was found
+-  **FAILED** : an error occured while executing the
+   :ref:`Audit <audit_definition>`
+-  **DELETED** : the :ref:`Audit <audit_definition>` is still stored in the
+   :ref:`Watcher database <watcher_database_definition>` but is not returned
+   any more through the Watcher APIs.
+-  **CANCELLED** : the :ref:`Audit <audit_definition>` was in **PENDING** or
+   **ONGOING** state and was cancelled by the
+   :ref:`Administrator <administrator_definition>`
+
+The following diagram shows the different possible states of an
+:ref:`Audit <audit_definition>` and what event makes the state change to a new
+value:
+
+.. image:: ./images/audit_state_machine.png
+   :width: 100%
+
+.. _action_plan_state_machine:
+
+Action Plan State Machine
+-------------------------
+
+An :ref:`Action Plan <action_plan_definition>` has a life-cycle and its current
+state may be one of the following:
+
+-  **RECOMMENDED** : the :ref:`Action Plan <action_plan_definition>` is waiting
+   for a validation from the :ref:`Administrator <administrator_definition>`
+-  **PENDING** : a request for an :ref:`Action Plan <action_plan_definition>`
+   has been submitted (due to an
+   :ref:`Administrator <administrator_definition>` executing an
+   :ref:`Audit <audit_definition>`) and is in the queue for
+   being processed by the :ref:`Watcher Applier <watcher_applier_definition>`
+-  **ONGOING** : the :ref:`Action Plan <action_plan_definition>` is currently
+   being processed by the :ref:`Watcher Applier <watcher_applier_definition>`
+-  **SUCCEEDED** : the :ref:`Action Plan <action_plan_definition>` has been
+   executed successfully (i.e. all :ref:`Actions <action_definition>` that it
+   contains have been executed successfully)
+-  **FAILED** : an error occured while executing the
+   :ref:`Action Plan <action_plan_definition>`
+-  **DELETED** : the :ref:`Action Plan <action_plan_definition>` is still
+   stored in the :ref:`Watcher database <watcher_database_definition>` but is
+   not returned any more through the Watcher APIs.
+-  **CANCELLED** : the :ref:`Action Plan <action_plan_definition>` was in
+   **PENDING** or **ONGOING** state and was cancelled by the
+   :ref:`Administrator <administrator_definition>`
+
+
+The following diagram shows the different possible states of an
+:ref:`Action Plan <action_plan_definition>` and what event makes the state
+change to a new value:
+
+.. image:: ./images/action_plan_state_machine.png
+   :width: 100%
+
+
+
 .. _Watcher API: webapi/v1.html

doc/source/conf.py

@@ -11,19 +11,15 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-import os
-import sys
 from watcher import version as watcher_version
 
-sys.path.insert(0, os.path.abspath('../..'))
 # -- General configuration ----------------------------------------------------
 
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = [
+    'oslo_config.sphinxconfiggen',
     'sphinx.ext.autodoc',
-    # 'sphinx.ext.intersphinx',
     'sphinx.ext.viewcode',
     'sphinxcontrib.httpdomain',
     'sphinxcontrib.pecanwsme.rest',
@@ -33,7 +29,8 @@ extensions = [
 ]
 
 wsme_protocols = ['restjson']
-
+config_generator_config_file = '../../etc/watcher/watcher-config-generator.conf'
+sample_config_basename = 'watcher'
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
 # text edit cycles.
@@ -46,8 +43,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'watcher'
+project = u'Watcher'
-copyright = u'2015, OpenStack Foundation'
+copyright = u'OpenStack Foundation'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -62,6 +59,14 @@ version = watcher_version.version_info.version_string()
 # A list of ignored prefixes for module index sorting.
 modindex_common_prefix = ['watcher.']
 
+exclude_patterns = [
+    # The man directory includes some snippet files that are included
+    # in other documents during the build but that should not be
+    # included in the toctree themselves, so tell Sphinx to ignore
+    # them when scanning for input files.
+    'man/footer.rst',
+    'man/general-options.rst',
+]
 
 # If true, '()' will be appended to :func: etc. cross-reference text.
 add_function_parentheses = True
@@ -73,6 +78,22 @@ add_module_names = True
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
+# -- Options for man page output --------------------------------------------
+
+# Grouping the document tree for man pages.
+# List of tuples 'sourcefile', 'target', u'title', u'Authors name', 'manual'
+
+man_pages = [
+    ('man/watcher-api', 'watcher-api', u'Watcher API Server',
+     [u'OpenStack'], 1),
+    ('man/watcher-applier', 'watcher-applier', u'Watcher Applier',
+     [u'OpenStack'], 1),
+    ('man/watcher-db-manage', 'watcher-db-manage',
+     u'Watcher Db Management Utility', [u'OpenStack'], 1),
+    ('man/watcher-decision-engine', 'watcher-decision-engine',
+     u'Watcher Decision Engine', [u'OpenStack'], 1),
+]
+
 # -- Options for HTML output --------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  Major themes that come with

doc/source/config-generator.conf

@@ -0,0 +1 @@
+../../etc/watcher/watcher-config-generator.conf

doc/source/deploy/conf-files.rst

@@ -0,0 +1,14 @@
+.. _watcher_sample_configuration_files:
+
+==================================
+Watcher sample configuration files
+==================================
+
+watcher.conf
+~~~~~~~~~~~~
+
+The ``watcher.conf`` file contains most of the options to configure the
+Watcher services.
+
+.. literalinclude:: ../watcher.conf.sample
+   :language: ini

doc/source/deploy/configuration.rst

@@ -34,6 +34,8 @@ The Watcher service includes the following components:
 - ``watcher-applier``: applies the action plan.
 - `python-watcherclient`_: A command-line interface (CLI) for interacting with
   the Watcher service.
+- `watcher-dashboard`_: An Horizon plugin for interacting with the Watcher
+  service.
 
 Additionally, the Bare Metal service has certain external dependencies, which
 are very similar to other OpenStack services:
@@ -52,6 +54,7 @@ additional functionality:
 .. _`ceilometer`: https://github.com/openstack/ceilometer
 .. _`nova`: https://github.com/openstack/nova
 .. _`python-watcherclient`: https://github.com/openstack/python-watcherclient
+.. _`watcher-dashboard`: https://github.com/openstack/watcher-dashboard
 .. _`watcher metering`: https://github.com/b-com/watcher-metering
 .. _`RabbitMQ`: https://www.rabbitmq.com/
 
@@ -160,17 +163,33 @@ Configure the Watcher service
 The Watcher service is configured via its configuration file. This file
 is typically located at ``/etc/watcher/watcher.conf``.
 
+You can easily generate and update a sample configuration file
+named :ref:`watcher.conf.sample <watcher_sample_configuration_files>` by using
+these following commands::
+
+    $ git clone git://git.openstack.org/openstack/watcher
+    $ cd watcher/
+    $ tox -econfig
+    $ vi etc/watcher/watcher.conf.sample
+
+
 The configuration file is organized into the following sections:
 
 * ``[DEFAULT]`` - General configuration
 * ``[api]`` - API server configuration
 * ``[database]`` - SQL driver configuration
 * ``[keystone_authtoken]`` - Keystone Authentication plugin configuration
+* ``[watcher_clients_auth]`` - Keystone auth configuration for clients
 * ``[watcher_applier]`` - Watcher Applier module configuration
 * ``[watcher_decision_engine]`` - Watcher Decision Engine module configuration
 * ``[watcher_goals]`` - Goals mapping configuration
 * ``[watcher_strategies]`` - Strategy configuration
 * ``[oslo_messaging_rabbit]`` - Oslo Messaging RabbitMQ driver configuration
+* ``[ceilometer_client]`` - Ceilometer client configuration
+* ``[cinder_client]`` - Cinder client configuration
+* ``[glance_client]`` - Glance client configuration
+* ``[nova_client]`` - Nova client configuration
+* ``[neutron_client]`` - Neutron client configuration
 
 The Watcher configuration file is expected to be named
 ``watcher.conf``. When starting Watcher, you can specify a different
@@ -237,39 +256,105 @@ so that the watcher service is configured for your needs.
     #rabbit_port = 5672
 
 
-#. Configure the Watcher Service to use these credentials with the Identity
+#. Watcher API shall validate the token provided by every incoming request,
-   Service. Replace IDENTITY_IP with the IP of the Identity server, and
+   via keystonemiddleware, which requires the Watcher service to be configured
-   replace WATCHER_PASSWORD with the password you chose for the ``watcher``
+   with the right credentials for the Identity service.
-   user in the Identity Service::
+
+   In the configuration section here below:
+
+   * replace IDENTITY_IP with the IP of the Identity server
+   * replace WATCHER_PASSWORD with the password you chose for the ``watcher``
+     user
+   * replace KEYSTONE_SERVICE_PROJECT_NAME with the name of project created
+     for OpenStack services (e.g. ``service``) ::
 
         [keystone_authtoken]
 
-    # Complete public Identity API endpoint (string value)
+        # Authentication type to load (unknown value)
-    #auth_uri=<None>
+        # Deprecated group/name - [DEFAULT]/auth_plugin
-    auth_uri=http://IDENTITY_IP:5000/v3
+        #auth_type = <None>
+        auth_type = password
 
-    # Complete admin Identity API endpoint. This should specify the
+        # Authentication URL (unknown value)
-    # unversioned root endpoint e.g. https://localhost:35357/ (string
+        #auth_url = <None>
-    # value)
+        auth_url = http://IDENTITY_IP:35357
-    #identity_uri = <None>
-    identity_uri = http://IDENTITY_IP:5000
 
-    # Keystone account username (string value)
+        # Username (unknown value)
-    #admin_user=<None>
+        # Deprecated group/name - [DEFAULT]/username
-    admin_user=watcher
+        #username = <None>
+        username=watcher
 
-    # Keystone account password (string value)
+        # User's password (unknown value)
-    #admin_password=<None>
+        #password = <None>
-    admin_password=WATCHER_DBPASSWORD
+        password = WATCHER_PASSWORD
 
-    # Keystone service account tenant name to validate user tokens
+        # Domain ID containing project (unknown value)
-    # (string value)
+        #project_domain_id = <None>
-    #admin_tenant_name=admin
+        project_domain_id = default
-    admin_tenant_name=KEYSTONE_SERVICE_PROJECT_NAME
 
-    # Directory used to cache files related to PKI tokens (string
+        # User's domain id (unknown value)
-    # value)
+        #user_domain_id = <None>
-    #signing_dir=<None>
+        user_domain_id = default
+
+        # Project name to scope to (unknown value)
+        # Deprecated group/name - [DEFAULT]/tenant-name
+        #project_name = <None>
+        project_name = KEYSTONE_SERVICE_PROJECT_NAME
+
+#. Watcher's decision engine and applier interact with other OpenStack
+   projects through those projects' clients. In order to instantiate these
+   clients, Watcher needs to request a new session from the Identity service
+   using the right credentials.
+
+   In the configuration section here below:
+
+   * replace IDENTITY_IP with the IP of the Identity server
+   * replace WATCHER_PASSWORD with the password you chose for the ``watcher``
+     user
+   * replace KEYSTONE_SERVICE_PROJECT_NAME with the name of project created
+     for OpenStack services (e.g. ``service``) ::
+
+        [watcher_clients_auth]
+
+        # Authentication type to load (unknown value)
+        # Deprecated group/name - [DEFAULT]/auth_plugin
+        #auth_type = <None>
+        auth_type = password
+
+        # Authentication URL (unknown value)
+        #auth_url = <None>
+        auth_url = http://IDENTITY_IP:35357
+
+        # Username (unknown value)
+        # Deprecated group/name - [DEFAULT]/username
+        #username = <None>
+        username=watcher
+
+        # User's password (unknown value)
+        #password = <None>
+        password = WATCHER_PASSWORD
+
+        # Domain ID containing project (unknown value)
+        #project_domain_id = <None>
+        project_domain_id = default
+
+        # User's domain id (unknown value)
+        #user_domain_id = <None>
+        user_domain_id = default
+
+        # Project name to scope to (unknown value)
+        # Deprecated group/name - [DEFAULT]/tenant-name
+        #project_name = <None>
+        project_name = KEYSTONE_SERVICE_PROJECT_NAME
+
+#. Configure the clients to use a specific version if desired. For example, to
+   configure Watcher to use a Nova client with version 2.1, use::
+
+    [nova_client]
+
+    # Version of Nova API to use in novaclient. (string value)
+    #api_version = 2
+    api_version = 2.1
 
 #. Create the Watcher Service database tables::
 
@@ -318,3 +403,33 @@ pick any database system you prefer.
 The original implementation has been based on MongoDB but you can create your
 own storage driver using whatever technology you want.
 For more information : https://wiki.openstack.org/wiki/Gnocchi
+
+
+Workers
+=======
+
+You can define a number of workers for the Decision Engine and the Applier.
+
+If you want to create and run more audits simultaneously, you have to raise
+the number of workers used by the Decision Engine::
+
+    [watcher_decision_engine]
+
+    ...
+
+    # The maximum number of threads that can be used to execute strategies
+    # (integer value)
+    #max_workers = 2
+
+
+If you want to execute simultaneously more recommended action plans, you
+have to raise the number of workers used by the Applier::
+
+    [watcher_applier]
+
+    ...
+
+    # Number of workers for applier, default value is 1. (integer value)
+    # Minimum value: 1
+    #workers = 1
+

doc/source/deploy/user-guide.rst

@@ -6,21 +6,30 @@
 
 .. _user-guide:
 
-=================================
+==================
-Welcome to the Watcher User Guide
+Watcher User Guide
-=================================
+==================
+
+See the
+`architecture page <https://factory.b-com.com/www/watcher/doc/watcher/architecture.html>`_
+for an architectural overview of the different components of Watcher and how
+they fit together.
 
-In the `architecture <https://wiki.openstack.org/wiki/WatcherArchitecture>`_
-you got information about how it works.
 In this guide we're going to take you through the fundamentals of using
 Watcher.
 
+The following diagram shows the main interactions between the
+:ref:`Administrator <administrator_definition>` and the Watcher system:
+
+.. image:: ../images/sequence_overview_watcher_usage.png
+   :width: 100%
+
 
 Getting started with Watcher
 ----------------------------
 This guide assumes you have a working installation of Watcher. If you get
 "*watcher: command not found*" you may have to verify your installation.
-Please refer to the :doc:`installation guide <installation>`.
+Please refer to the `installation guide`_.
 In order to use Watcher, you have to configure your credentials suitable for
 watcher command-line tools.
 If you need help on a specific command, you can use:
@@ -29,6 +38,12 @@ If you need help on a specific command, you can use:
 
   $ watcher help COMMAND
 
+If you want to deploy Watcher in Horizon, please refer to the `Watcher Horizon
+plugin installation guide`_.
+
+.. _`installation guide`: https://factory.b-com.com/www/watcher/doc/python-watcherclient
+.. _`Watcher Horizon plugin installation guide`: https://factory.b-com.com/www/watcher/doc/watcher-dashboard/deploy/installation.html
+
 Seeing what the Watcher CLI can do ?
 ------------------------------------
 We can see all of the commands available with Watcher CLI by running the
@@ -49,7 +64,7 @@ This goal should be declared in the Watcher service configuration file
 
 .. code:: bash
 
-  $ watcher audit-template-create my_first_audit SERVERS_CONSOLIDATION
+  $ watcher audit-template-create my_first_audit DUMMY
 
 If you get "*You must provide a username via either --os-username or via
 env[OS_USERNAME]*" you may have to verify your credentials.
@@ -90,7 +105,7 @@ configuration file.
   $ watcher action-plan-list --audit <the_audit_uuid>
 
 - Have a look on the list of optimization :ref:`actions <action_definition>`
-contained in this new :ref:`action plan <action_plan_definition>`:
+  contained in this new :ref:`action plan <action_plan_definition>`:
 
 .. code:: bash
 
@@ -119,3 +134,4 @@ You can also obtain more detailed information about a specific action:
 .. code:: bash
 
   $ watcher action-show <the_action_uuid>
+

doc/source/dev/contributing.rst

@@ -6,9 +6,9 @@
 
 .. _contributing:
 
-======================
+=======================
 Contributing to Watcher
-======================
+=======================
 
 If you're interested in contributing to the Watcher project,
 the following will help get you started.
@@ -43,7 +43,7 @@ notifications of important events.
 
 
 Project Hosting Details
--------------------------
+-----------------------
 
 Bug tracker
     http://launchpad.net/watcher
@@ -60,3 +60,12 @@ Code Hosting
 Code Review
     https://review.openstack.org/#/q/status:open+project:openstack/watcher,n,z
 
+IRC Channel
+    ``#openstack-watcher`` (changelog_)
+
+Weekly Meetings
+    on Wednesdays at 14:00 UTC in the ``#openstack-meeting-4`` IRC
+    channel (`meetings logs`_)
+
+.. _changelog: http://eavesdrop.openstack.org/irclogs/%23openstack-watcher/
+.. _meetings logs:  http://eavesdrop.openstack.org/meetings/watcher/

doc/source/dev/devstack.rst

@@ -0,0 +1,204 @@
+..
+      Except where otherwise noted, this document is licensed under Creative
+      Commons Attribution 3.0 License.  You can view the license at:
+
+          https://creativecommons.org/licenses/by/3.0/
+
+=============================================
+Set up a development environment via DevStack
+=============================================
+
+Watcher is currently able to optimize compute resources - specifically Nova
+compute hosts - via operations such as live migrations. In order for you to
+fully be able to exercise what Watcher can do, it is necessary to have a
+multinode environment to use.
+
+You can set up the Watcher services quickly and easily using a Watcher
+DevStack plugin. See `PluginModelDocs`_ for information on DevStack's plugin
+model. To enable the Watcher plugin with DevStack, add the following to the
+`[[local|localrc]]` section of your controller's `local.conf` to enable the
+Watcher plugin::
+
+    enable_plugin watcher git://git.openstack.org/openstack/watcher
+
+For more detailed instructions, see `Detailed DevStack Instructions`_. Check
+out the `DevStack documentation`_ for more information regarding DevStack.
+
+.. _PluginModelDocs: http://docs.openstack.org/developer/devstack/plugins.html
+.. _DevStack documentation: http://docs.openstack.org/developer/devstack/
+
+Detailed DevStack Instructions
+==============================
+
+#. Obtain N (where N >= 1) servers (virtual machines preferred for DevStack).
+   One of these servers will be the controller node while the others will be
+   compute nodes. N is preferably >= 3 so that you have at least 2 compute
+   nodes, but in order to stand up the Watcher services only 1 server is
+   needed (i.e., no computes are needed if you want to just experiment with
+   the Watcher services). These servers can be VMs running on your local
+   machine via VirtualBox if you prefer. DevStack currently recommends that
+   you use Ubuntu 14.04 LTS. The servers should also have connections to the
+   same network such that they are all able to communicate with one another.
+
+#. For each server, clone the DevStack repository and create the stack user::
+
+       sudo apt-get update
+       sudo apt-get install git
+       git clone https://git.openstack.org/openstack-dev/devstack
+       sudo ./devstack/tools/create-stack-user.sh
+
+   Now you have a stack user that is used to run the DevStack processes. You
+   may want to give your stack user a password to allow SSH via a password::
+
+       sudo passwd stack
+
+#. Switch to the stack user and clone the DevStack repo again::
+
+       sudo su stack
+       cd ~
+       git clone https://git.openstack.org/openstack-dev/devstack
+
+#. For each compute node, copy the provided `local.conf.compute`_ example file
+   to the compute node's system at ~/devstack/local.conf. Make sure the
+   HOST_IP and SERVICE_HOST values are changed appropriately - i.e., HOST_IP
+   is set to the IP address of the compute node and SERVICE_HOST is set to the
+   IP address of the controller node.
+
+   If you need specific metrics collected (or want to use something other
+   than Ceilometer), be sure to configure it. For example, in the
+   `local.conf.compute`_ example file, the appropriate ceilometer plugins and
+   services are enabled and disabled. If you were using something other than
+   Ceilometer, then you would likely want to configure it likewise. The
+   example file also sets the compute monitors nova configuration option to
+   use the CPU virt driver. If you needed other metrics, it may be necessary
+   to configure similar configuration options for the projects providing those
+   metrics.
+
+#. For the controller node, copy the provided `local.conf.controller`_ example
+   file to the controller node's system at ~/devstack/local.conf. Make sure
+   the HOST_IP value is changed appropriately - i.e., HOST_IP is set to the IP
+   address of the controller node.
+
+   Note: if you want to use another Watcher git repository (such as a local
+   one), then change the enable plugin line::
+
+       enable_plugin watcher <your_local_git_repo> [optional_branch]
+
+   If you do this, then the Watcher DevStack plugin will try to pull the
+   python-watcherclient repo from <your_local_git_repo>/../, so either make
+   sure that is also available or specify WATCHERCLIENT_REPO in the local.conf
+   file.
+
+   Note: if you want to use a specific branch, specify WATCHER_BRANCH in the
+   local.conf file. By default it will use the master branch.
+
+#. Start stacking from the controller node::
+
+       ./devstack/stack.sh
+
+#. Start stacking on each of the compute nodes using the same command.
+
+#. Configure the environment for live migration via NFS. See the
+   `Multi-Node DevStack Environment`_ section for more details.
+
+.. _local.conf.controller: https://github.com/openstack/watcher/tree/master/devstack/local.conf.controller
+.. _local.conf.compute: https://github.com/openstack/watcher/tree/master/devstack/local.conf.compute
+
+Multi-Node DevStack Environment
+===============================
+
+Since deploying Watcher with only a single compute node is not very useful, a
+few tips are given here for enabling a multi-node environment with live
+migration.
+
+Configuring NFS Server
+----------------------
+
+If you would like to use live migration for shared storage, then the controller
+can serve as the NFS server if needed::
+
+    sudo apt-get install nfs-kernel-server
+    sudo mkdir -p /nfs/instances
+    sudo chown stack:stack /nfs/instances
+
+Add an entry to `/etc/exports` with the appropriate gateway and netmask
+information::
+
+    /nfs/instances <gateway>/<netmask>(rw,fsid=0,insecure,no_subtree_check,async,no_root_squash)
+
+Export the NFS directories::
+
+    sudo exportfs -ra
+
+Make sure the NFS server is running::
+
+    sudo service nfs-kernel-server status
+
+If the server is not running, then start it::
+
+    sudo service nfs-kernel-server start
+
+Configuring NFS on Compute Node
+-------------------------------
+
+Each compute node needs to use the NFS server to hold the instance data::
+
+    sudo apt-get install rpcbind nfs-common
+    mkdir -p /opt/stack/data/instances
+    sudo mount <nfs-server-ip>:/nfs/instances /opt/stack/data/instances
+
+If you would like to have the NFS directory automatically mounted on reboot,
+then add the following to `/etc/fstab`::
+
+    <nfs-server-ip>:/nfs/instances /opt/stack/data/instances nfs auto 0 0
+
+Edit `/etc/libvirt/libvirtd.conf` to make sure the following values are set::
+
+    listen_tls = 0
+    listen_tcp = 1
+    auth_tcp = "none"
+
+Edit `/etc/default/libvirt-bin`::
+
+    libvirt_opts="-d -l"
+
+Restart the libvirt service::
+
+    sudo service libvirt-bin restart
+
+Setting up SSH keys between compute nodes to enable live migration
+------------------------------------------------------------------
+
+In order for live migration to work, SSH keys need to be exchanged between
+each compute node:
+
+1. The SOURCE root user's public RSA key (likely in /root/.ssh/id_rsa.pub)
+   needs to be in the DESTINATION stack user's authorized_keys file
+   (~stack/.ssh/authorized_keys). This can be accomplished by manually
+   copying the contents from the file on the SOURCE to the DESTINATION. If
+   you have a password configured for the stack user, then you can use the
+   following command to accomplish the same thing::
+
+        ssh-copy-id -i /root/.ssh/id_rsa.pub stack@DESTINATION
+
+2. The DESTINATION host's public ECDSA key (/etc/ssh/ssh_host_ecdsa_key.pub)
+   needs to be in the SOURCE root user's known_hosts file
+   (/root/.ssh/known_hosts). This can be accomplished by running the
+   following on the SOURCE machine (hostname must be used)::
+
+        ssh-keyscan -H DEST_HOSTNAME | sudo tee -a /root/.ssh/known_hosts
+
+In essence, this means that every compute node's root user's public RSA key
+must exist in every other compute node's stack user's authorized_keys file and
+every compute node's public ECDSA key needs to be in every other compute
+node's root user's known_hosts file.
+
+
+Environment final checkup
+-------------------------
+
+If you are willing to make sure everything is in order in your DevStack
+environment, you can run the Watcher Tempest tests which will validate its API
+but also that you can perform the typical Watcher workflows. To do so, have a
+look at the :ref:`Tempest tests <tempest_tests>` section which will explain to
+you how to run them.

doc/source/dev/environment.rst

@@ -4,9 +4,11 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-============================================
+.. _watcher_developement_environment:
-Setting up a Watcher development environment
+
-============================================
+=========================================
+Set up a development environment manually
+=========================================
 
 This document describes getting the source from watcher `Git repository`_
 for development purposes.
@@ -75,15 +77,11 @@ extension, PyPi) cannot satisfy. These dependencies should be installed
 prior to using `pip`, and the installation method may vary depending on
 your platform.
 
-* Ubuntu 14.04:
+* Ubuntu 14.04::
-
-  .. code-block:: bash
 
     $ sudo apt-get install python-dev libssl-dev libmysqlclient-dev libffi-dev
 
-* Fedora 19+:
+* Fedora 19+::
-
-  .. code-block:: bash
 
     $ sudo yum install openssl-devel libffi-devel mysql-devel
 
@@ -147,34 +145,13 @@ You should then be able to `import watcher` using Python without issue:
 
 If you can import watcher without a traceback, you should be ready to develop.
 
-Run Watcher unit tests
+Run Watcher tests
-======================
+=================
 
-All unit tests should be run using tox. To run the unit tests under py27 and
+Watcher provides both :ref:`unit tests <unit_tests>` and
-also run the pep8 tests:
+:ref:`functional/tempest tests <tempest_tests>`. Please refer to :doc:`testing`
+to understand how to run them.
 
-.. code-block:: bash
-
-    $ workon watcher
-    (watcher) $ pip install tox
-
-    (watcher) $ cd watcher
-    (watcher) $ tox -epep8 -epy27
-
-You may pass options to the test programs using positional arguments. To run a
-specific unit test, this passes the -r option and desired test (regex string)
-to os-testr:
-
-.. code-block:: bash
-
-    $ workon watcher
-    (watcher) $ tox -epy27 -- tests.api
-
-When you're done, deactivate the virtualenv:
-
-.. code-block:: bash
-
-    $ deactivate
 
 Build the Watcher documentation
 ===============================
@@ -273,6 +250,11 @@ interface.
 
 .. _`python-watcherclient`: https://github.com/openstack/python-watcherclient
 
+There is also an Horizon plugin for Watcher `watcher-dashboard`_ which
+allows to interact with Watcher through a web-based interface.
+
+.. _`watcher-dashboard`: https://github.com/openstack/watcher-dashboard
+
 
 Exercising the Watcher Services locally
 =======================================
@@ -287,4 +269,3 @@ template files to easily play with Watcher services within a minimal OpenStack
 isolated environment (Identity, Message Bus, SQL database, Horizon, ...).
 
 .. _`watcher-tools`: https://github.com/b-com/watcher-tools
-

doc/source/dev/plugin/action-plugin.rst

@@ -0,0 +1,171 @@
+..
+      Except where otherwise noted, this document is licensed under Creative
+      Commons Attribution 3.0 License.  You can view the license at:
+
+          https://creativecommons.org/licenses/by/3.0/
+
+==================
+Build a new action
+==================
+
+Watcher Applier has an external :ref:`action <action_definition>` plugin
+interface which gives anyone the ability to integrate an external
+:ref:`action <action_definition>` in order to extend the initial set of actions
+Watcher provides.
+
+This section gives some guidelines on how to implement and integrate custom
+actions with Watcher.
+
+
+Creating a new plugin
+=====================
+
+First of all you have to extend the base :py:class:`BaseAction` class which
+defines a set of abstract methods and/or properties that you will have to
+implement:
+
+ - The :py:attr:`~.BaseAction.schema` is an abstract property that you have to
+   implement. This is the first function to be called by the
+   :ref:`applier <watcher_applier_definition>` before any further processing
+   and its role is to validate the input parameters that were provided to it.
+ - The :py:meth:`~.BaseAction.precondition` is called before the execution of
+   an action. This method is a hook that can be used to perform some
+   initializations or to make some more advanced validation on its input
+   parameters. If you wish to block the execution based on this factor, you
+   simply have to ``raise`` an exception.
+ - The :py:meth:`~.BaseAction.postcondition` is called after the execution of
+   an action. As this function is called regardless of whether an action
+   succeeded or not, this can prove itself useful to perform cleanup
+   operations.
+ - The :py:meth:`~.BaseAction.execute` is the main component of an action.
+   This is where you should implement the logic of your action.
+ - The :py:meth:`~.BaseAction.revert` allows you to roll back the targeted
+   resource to its original state following a faulty execution. Indeed, this
+   method is called by the workflow engine whenever an action raises an
+   exception.
+
+Here is an example showing how you can write a plugin called ``DummyAction``:
+
+.. code-block:: python
+
+    # Filepath = <PROJECT_DIR>/thirdparty/dummy.py
+    # Import path = thirdparty.dummy
+    import voluptuous
+
+    from watcher.applier.actions import base
+
+
+    class DummyAction(baseBaseAction):
+
+        @property
+        def schema(self):
+            return voluptuous.Schema({})
+
+        def execute(self):
+            # Does nothing
+            pass  # Only returning False is considered as a failure
+
+        def revert(self):
+            # Does nothing
+            pass
+
+        def precondition(self):
+            # No pre-checks are done here
+            pass
+
+        def postcondition(self):
+            # Nothing done here
+            pass
+
+
+This implementation is the most basic one. So if you want to have more advanced
+examples, have a look at the implementation of the actions already provided
+by Watcher like.
+To get a better understanding on how to implement a more advanced action,
+have a look at the :py:class:`~watcher.applier.actions.migration.Migrate`
+class.
+
+Input validation
+----------------
+
+As you can see in the previous example, we are using `Voluptuous`_ to validate
+the input parameters of an action. So if you want to learn more about how to
+work with `Voluptuous`_, you can have a look at their `documentation`_ here:
+
+.. _Voluptuous: https://github.com/alecthomas/voluptuous
+.. _documentation: https://github.com/alecthomas/voluptuous/blob/master/README.md
+
+Abstract Plugin Class
+=====================
+
+Here below is the abstract ``BaseAction`` class that every single action
+should implement:
+
+.. autoclass:: watcher.applier.actions.base.BaseAction
+    :members:
+    :noindex:
+
+    .. py:attribute:: schema
+
+        Defines a Schema that the input parameters shall comply to
+
+        :returns: A schema declaring the input parameters this action should be
+                  provided along with their respective constraints
+                  (e.g. type, value range, ...)
+        :rtype: :py:class:`voluptuous.Schema` instance
+
+
+Register a new entry point
+==========================
+
+In order for the Watcher Applier to load your new action, the
+action must be registered as a named entry point under the
+``watcher_actions`` entry point of your ``setup.py`` file. If you are using
+pbr_, this entry point should be placed in your ``setup.cfg`` file.
+
+The name you give to your entry point has to be unique.
+
+Here below is how you would proceed to register ``DummyAction`` using pbr_:
+
+.. code-block:: ini
+
+    [entry_points]
+    watcher_actions =
+        dummy = thirdparty.dummy:DummyAction
+
+.. _pbr: http://docs.openstack.org/developer/pbr/
+
+
+Using action plugins
+====================
+
+The Watcher Applier service will automatically discover any installed plugins
+when it is restarted. If a Python package containing a custom plugin is
+installed within the same environment as Watcher, Watcher will automatically
+make that plugin available for use.
+
+At this point, you can use your new action plugin in your :ref:`strategy plugin
+<implement_strategy_plugin>` if you reference it via the use of the
+:py:meth:`~.Solution.add_action` method:
+
+.. code-block:: python
+
+    # [...]
+    self.solution.add_action(
+        action_type="dummy",  # Name of the entry point we registered earlier
+        applies_to="",
+        input_parameters={})
+
+By doing so, your action will be saved within the Watcher Database, ready to be
+processed by the planner for creating an action plan which can then be executed
+by the Watcher Applier via its workflow engine.
+
+
+Scheduling of an action plugin
+==============================
+
+Watcher provides a basic built-in :ref:`planner <watcher_planner_definition>`
+which is only able to process the Watcher built-in actions. Therefore, you will
+either have to use an existing third-party planner or :ref:`implement another
+planner <implement_planner_plugin>` that will be able to take into account your
+new action plugin.

doc/source/dev/plugin/base-setup.rst

@@ -0,0 +1,90 @@
+..
+      Except where otherwise noted, this document is licensed under Creative
+      Commons Attribution 3.0 License.  You can view the license at:
+
+          https://creativecommons.org/licenses/by/3.0/
+
+.. _plugin-base_setup:
+
+=======================================
+Create a third-party plugin for Watcher
+=======================================
+
+Watcher provides a plugin architecture which allows anyone to extend the
+existing functionalities by implementing third-party plugins. This process can
+be cumbersome so this documentation is there to help you get going as quickly
+as possible.
+
+
+Pre-requisites
+==============
+
+We assume that you have set up a working Watcher development environment. So if
+this not already the case, you can check out our documentation which explains
+how to set up a :ref:`development environment
+<watcher_developement_environment>`.
+
+.. _development environment:
+
+Third party project scaffolding
+===============================
+
+First off, we need to create the project structure. To do so, we can use
+`cookiecutter`_ and the `OpenStack cookiecutter`_ project scaffolder to
+generate the skeleton of our project::
+
+    $ virtualenv thirdparty
+    $ source thirdparty/bin/activate
+    $ pip install cookiecutter
+    $ cookiecutter https://github.com/openstack-dev/cookiecutter
+
+The last command will ask you for many information, and If you set
+``module_name`` and ``repo_name`` as ``thirdparty``, you should end up with a
+structure that looks like this::
+
+    $ cd thirdparty
+    $ tree .
+    .
+    ├── babel.cfg
+    ├── CONTRIBUTING.rst
+    ├── doc
+    │   └── source
+    │       ├── conf.py
+    │       ├── contributing.rst
+    │       ├── index.rst
+    │       ├── installation.rst
+    │       ├── readme.rst
+    │       └── usage.rst
+    ├── HACKING.rst
+    ├── LICENSE
+    ├── MANIFEST.in
+    ├── README.rst
+    ├── requirements.txt
+    ├── setup.cfg
+    ├── setup.py
+    ├── test-requirements.txt
+    ├── thirdparty
+    │   ├── __init__.py
+    │   └── tests
+    │       ├── base.py
+    │       ├── __init__.py
+    │       └── test_thirdparty.py
+    └── tox.ini
+
+.. _cookiecutter: https://github.com/audreyr/cookiecutter
+.. _OpenStack cookiecutter: https://github.com/openstack-dev/cookiecutter
+
+Implementing a plugin for Watcher
+=================================
+
+Now that the project skeleton has been created, you can start the
+implementation of your plugin. As of now, you can implement the following
+plugins for Watcher:
+
+- A :ref:`strategy plugin <implement_strategy_plugin>`
+- A :ref:`planner plugin <implement_planner_plugin>`
+- An :ref:`action plugin <implement_strategy_plugin>`
+- A :ref:`workflow engine plugin <implement_workflow_engine_plugin>`
+
+If you want to learn more on how to implement them, you can refer to their
+dedicated documentation.

doc/source/dev/plugin/planner-plugin.rst

@@ -0,0 +1,127 @@
+..
+      Except where otherwise noted, this document is licensed under Creative
+      Commons Attribution 3.0 License.  You can view the license at:
+
+          https://creativecommons.org/licenses/by/3.0/
+
+.. _implement_planner_plugin:
+
+===================
+Build a new planner
+===================
+
+Watcher :ref:`Decision Engine <watcher_decision_engine_definition>` has an
+external :ref:`planner <planner_definition>` plugin interface which gives
+anyone the ability to integrate an external :ref:`planner <planner_definition>`
+in order to extend the initial set of planners Watcher provides.
+
+This section gives some guidelines on how to implement and integrate custom
+planners with Watcher.
+
+.. _Decision Engine: watcher_decision_engine_definition
+
+Creating a new plugin
+=====================
+
+First of all you have to extend the base :py:class:`~.BasePlanner` class which
+defines an abstract method that you will have to implement. The
+:py:meth:`~.BasePlanner.schedule` is the method being called by the Decision
+Engine to schedule a given solution (:py:class:`~.BaseSolution`) into an
+:ref:`action plan <action_plan_definition>` by ordering/sequencing an unordered
+set of actions contained in the proposed solution (for more details, see
+:ref:`definition of a solution <solution_definition>`).
+
+Here is an example showing how you can write a planner plugin called
+``DummyPlanner``:
+
+.. code-block:: python
+
+    # Filepath = third-party/third_party/dummy.py
+    # Import path = third_party.dummy
+    import uuid
+    from watcher.decision_engine.planner import base
+
+
+    class DummyPlanner(base.BasePlanner):
+
+        def _create_action_plan(self, context, audit_id):
+            action_plan_dict = {
+                'uuid': uuid.uuid4(),
+                'audit_id': audit_id,
+                'first_action_id': None,
+                'state': objects.action_plan.State.RECOMMENDED
+            }
+
+            new_action_plan = objects.ActionPlan(context, **action_plan_dict)
+            new_action_plan.create(context)
+            new_action_plan.save()
+            return new_action_plan
+
+        def schedule(self, context, audit_id, solution):
+            # Empty action plan
+            action_plan = self._create_action_plan(context, audit_id)
+            # todo: You need to create the workflow of actions here
+            # and attach it to the action plan
+            return action_plan
+
+This implementation is the most basic one. So if you want to have more advanced
+examples, have a look at the implementation of planners already provided by
+Watcher like :py:class:`~.DefaultPlanner`. A list with all available planner
+plugins can be found :ref:`here <watcher_planners>`.
+
+Abstract Plugin Class
+=====================
+
+Here below is the abstract ``BasePlanner`` class that every single planner
+should implement:
+
+.. autoclass:: watcher.decision_engine.planner.base.BasePlanner
+    :members:
+    :noindex:
+
+
+Register a new entry point
+==========================
+
+In order for the Watcher Decision Engine to load your new planner, the
+latter must be registered as a new entry point under the
+``watcher_planners`` entry point namespace of your ``setup.py`` file. If you
+are using pbr_, this entry point should be placed in your ``setup.cfg`` file.
+
+The name you give to your entry point has to be unique.
+
+Here below is how you would proceed to register ``DummyPlanner`` using pbr_:
+
+.. code-block:: ini
+
+    [entry_points]
+    watcher_planners =
+        dummy = third_party.dummy:DummyPlanner
+
+.. _pbr: http://docs.openstack.org/developer/pbr/
+
+
+Using planner plugins
+=====================
+
+The :ref:`Watcher Decision Engine <watcher_decision_engine_definition>` service
+will automatically discover any installed plugins when it is started. This
+means that if Watcher is already running when you install your plugin, you will
+have to restart the related Watcher services. If a Python package containing a
+custom plugin is installed within the same environment as Watcher, Watcher will
+automatically make that plugin available for use.
+
+At this point, Watcher will use your new planner if you referenced it in the
+``planner`` option under the ``[watcher_planner]`` section of your
+``watcher.conf`` configuration file when you started it. For example, if you
+want to use the ``dummy`` planner you just installed, you would have to
+select it as followed:
+
+.. code-block:: ini
+
+    [watcher_planner]
+    planner = dummy
+
+As you may have noticed, only a single planner implementation can be activated
+at a time, so make sure it is generic enough to support all your strategies
+and actions.

doc/source/dev/plugin/strategy-plugin.rst

@@ -0,0 +1,215 @@
+..
+      Except where otherwise noted, this document is licensed under Creative
+      Commons Attribution 3.0 License.  You can view the license at:
+
+          https://creativecommons.org/licenses/by/3.0/
+
+.. _implement_strategy_plugin:
+
+=================================
+Build a new optimization strategy
+=================================
+
+Watcher Decision Engine has an external :ref:`strategy <strategy_definition>`
+plugin interface which gives anyone the ability to integrate an external
+strategy in order to make use of placement algorithms.
+
+This section gives some guidelines on how to implement and integrate custom
+strategies with Watcher.
+
+
+Pre-requisites
+==============
+
+Before using any strategy, you should make sure you have your Telemetry service
+configured so that it would provide you all the metrics you need to be able to
+use your strategy.
+
+
+Creating a new plugin
+=====================
+
+First of all you have to:
+
+- Extend :py:class:`~.BaseStrategy`
+- Implement its :py:meth:`~.BaseStrategy.execute` method
+
+Here is an example showing how you can write a plugin called ``DummyStrategy``:
+
+.. code-block:: python
+
+    import uuid
+
+    class DummyStrategy(BaseStrategy):
+
+        DEFAULT_NAME = "dummy"
+        DEFAULT_DESCRIPTION = "Dummy Strategy"
+
+        def __init__(self, name=DEFAULT_NAME, description=DEFAULT_DESCRIPTION):
+            super(DummyStrategy, self).__init__(name, description)
+
+        def execute(self, model):
+            migration_type = 'live'
+            src_hypervisor = 'compute-host-1'
+            dst_hypervisor = 'compute-host-2'
+            instance_id = uuid.uuid4()
+            parameters = {'migration_type': migration_type,
+                          'src_hypervisor': src_hypervisor,
+                          'dst_hypervisor': dst_hypervisor}
+            self.solution.add_action(action_type="migration",
+                                     resource_id=instance_id,
+                                     input_parameters=parameters)
+            # Do some more stuff here ...
+            return self.solution
+
+As you can see in the above example, the :py:meth:`~.BaseStrategy.execute`
+method returns a :py:class:`~.BaseSolution` instance as required. This solution
+is what wraps the abstract set of actions the strategy recommends to you. This
+solution is then processed by a :ref:`planner <planner_definition>` to produce
+an action plan which shall contain the sequenced flow of actions to be
+executed by the :ref:`Watcher Applier <watcher_applier_definition>`.
+
+Please note that your strategy class will be instantiated without any
+parameter. Therefore, you should make sure not to make any of them required in
+your ``__init__`` method.
+
+
+Abstract Plugin Class
+=====================
+
+Here below is the abstract :py:class:`~.BaseStrategy` class that every single
+strategy should implement:
+
+.. autoclass:: watcher.decision_engine.strategy.strategies.base.BaseStrategy
+    :members:
+    :noindex:
+
+
+Add a new entry point
+=====================
+
+In order for the Watcher Decision Engine to load your new strategy, the
+strategy must be registered as a named entry point under the
+``watcher_strategies`` entry point of your ``setup.py`` file. If you are using
+pbr_, this entry point should be placed in your ``setup.cfg`` file.
+
+The name you give to your entry point has to be unique.
+
+Here below is how you would proceed to register ``DummyStrategy`` using pbr_:
+
+.. code-block:: ini
+
+    [entry_points]
+    watcher_strategies =
+        dummy = thirdparty.dummy:DummyStrategy
+
+
+To get a better understanding on how to implement a more advanced strategy,
+have a look at the :py:class:`~.BasicConsolidation` class.
+
+.. _pbr: http://docs.openstack.org/developer/pbr/
+
+Using strategy plugins
+======================
+
+The Watcher Decision Engine service will automatically discover any installed
+plugins when it is restarted. If a Python package containing a custom plugin is
+installed within the same environment as Watcher, Watcher will automatically
+make that plugin available for use.
+
+At this point, Watcher will use your new strategy if you reference it in the
+``goals`` under the ``[watcher_goals]`` section of your ``watcher.conf``
+configuration file. For example, if you want to use a ``dummy`` strategy you
+just installed, you would have to associate it to a goal like this:
+
+.. code-block:: ini
+
+    [watcher_goals]
+    goals = BALANCE_LOAD:basic,MINIMIZE_ENERGY_CONSUMPTION:dummy
+
+
+You should take care when installing strategy plugins. By their very nature,
+there are no guarantees that utilizing them as is will be supported, as
+they may require a set of metrics which is not yet available within the
+Telemetry service. In such a case, please do make sure that you first
+check/configure the latter so your new strategy can be fully functional.
+
+Querying metrics
+----------------
+
+A large set of metrics, generated by OpenStack modules, can be used in your
+strategy implementation. To collect these metrics, Watcher provides a
+`Helper`_ to the Ceilometer API, which makes this API reusable and easier
+to used.
+
+If you want to use your own metrics database backend, please refer to the
+`Ceilometer developer guide`_. Indeed, Ceilometer's pluggable model allows
+for various types of backends.  A list of the available backends is located
+here_. The Ceilosca project is a good example of how to create your own
+pluggable backend.
+
+
+Finally, if your strategy requires new metrics not covered by Ceilometer, you
+can add them through a Ceilometer `plugin`_.
+
+.. _`Helper`: https://github.com/openstack/watcher/blob/master/watcher/metrics_engine/cluster_history/ceilometer.py#L31
+.. _`Ceilometer developer guide`: http://docs.openstack.org/developer/ceilometer/architecture.html#storing-the-data
+.. _`here`: http://docs.openstack.org/developer/ceilometer/install/dbreco.html#choosing-a-database-backend
+.. _`plugin`: http://docs.openstack.org/developer/ceilometer/plugins.html
+.. _`Ceilosca`: https://github.com/openstack/monasca-ceilometer/blob/master/ceilosca/ceilometer/storage/impl_monasca.py
+
+
+Read usage metrics using the Python binding
+-------------------------------------------
+
+You can find the information about the Ceilometer Python binding on the
+OpenStack `ceilometer client python API documentation
+<http://docs.openstack.org/developer/python-ceilometerclient/api.html>`_
+
+To facilitate the process, Watcher provides the ``osc`` attribute to every
+strategy which includes clients to major OpenStack services, including
+Ceilometer. So to access it within your strategy, you can do the following:
+
+.. code-block:: py
+
+    # Within your strategy "execute()"
+    cclient = self.osc.ceilometer
+    # TODO: Do something here
+
+Using that you can now query the values for that specific metric:
+
+.. code-block:: py
+
+    query = None  # e.g. [{'field': 'foo', 'op': 'le', 'value': 34},]
+    value_cpu = cclient.samples.list(
+        meter_name='cpu_util',
+        limit=10, q=query)
+
+
+Read usage metrics using the Watcher Cluster History Helper
+-----------------------------------------------------------
+
+Here below is the abstract ``BaseClusterHistory`` class of the Helper.
+
+.. autoclass:: watcher.metrics_engine.cluster_history.api.BaseClusterHistory
+    :members:
+    :noindex:
+
+
+The following code snippet shows how to create a Cluster History class:
+
+.. code-block:: py
+
+    from watcher.metrics_engine.cluster_history import ceilometer as ceil
+
+    query_history  = ceil.CeilometerClusterHistory()
+
+Using that you can now query the values for that specific metric:
+
+.. code-block:: py
+
+    query_history.statistic_aggregation(resource_id=hypervisor.uuid,
+                                  meter_name='compute.node.cpu.percent',
+                                  period="7200",
+                                  aggregate='avg'
+                                  )

doc/source/dev/plugins.rst

@@ -4,186 +4,35 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-===============
-Watcher plugins
-===============
 
-Writing a Watcher Decision Engine plugin
+=================
-========================================
+Available Plugins
+=================
 
-Watcher has an external :ref:`strategy <strategy_definition>` plugin interface
+.. _watcher_strategies:
-which gives anyone the ability to integrate an external :ref:`strategy
-<strategy_definition>` in order to make use of placement algorithms.
 
-This section gives some guidelines on how to implement and integrate custom
+Strategies
-Stategies with Watcher.
+==========
 
-Pre-requisites
+.. drivers-doc:: watcher_strategies
---------------
 
-Before using any strategy, you should make sure you have your Telemetry service
+.. _watcher_actions:
-configured so that it would provide you all the metrics you need to be able to
-use your strategy.
 
+Actions
+=======
 
-Creating a new plugin
+.. drivers-doc:: watcher_actions
----------------------
 
-First of all you have to:
+.. _watcher_workflow_engines:
 
-- Extend the base ``BaseStrategy`` class
+Workflow Engines
-- Implement its ``execute`` method
+================
 
-Here is an example showing how you can write a plugin called ``DummyStrategy``:
+.. drivers-doc:: watcher_workflow_engines
 
-.. code-block:: python
+.. _watcher_planners:
 
-    # Filepath = third-party/third_party/dummy.py
+Planners
-    # Import path = third_party.dummy
+========
-
-    class DummyStrategy(BaseStrategy):
-
-        DEFAULT_NAME = "dummy"
-        DEFAULT_DESCRIPTION = "Dummy Strategy"
-
-        def __init__(self, name=DEFAULT_NAME, description=DEFAULT_DESCRIPTION):
-            super(DummyStrategy, self).__init__(name, description)
-
-        def execute(self, model):
-            self.solution.add_change_request(
-                Migrate(vm=my_vm, src_hypervisor=src, dest_hypervisor=dest)
-            )
-            # Do some more stuff here ...
-            return self.solution
-
-As you can see in the above example, the ``execute()`` method returns a
-solution as required.
-
-Please note that your strategy class will be instantiated without any
-parameter. Therefore, you should make sure not to make any of them required in
-your ``__init__`` method.
-
-
-Abstract Plugin Class
----------------------
-
-Here below is the abstract ``BaseStrategy`` class that every single strategy
-should implement:
-
-.. automodule:: watcher.decision_engine.strategy.base
-    :noindex:
-
-.. autoclass:: BaseStrategy
-    :members:
-
-
-Add a new entry point
----------------------
-
-In order for the Watcher Decision Engine to load your new strategy, the
-strategy must be registered as a named entry point under the
-``watcher_strategies`` entry point of your ``setup.py`` file. If you are using
-pbr_, this entry point should be placed in your ``setup.cfg`` file.
-
-The name you give to your entry point has to be unique.
-
-Here below is how you would proceed to register ``DummyStrategy`` using pbr_:
-
-.. code-block:: ini
-
-    [entry_points]
-    watcher_strategies =
-        dummy = third_party.dummy:DummyStrategy
-
-
-To get a better understanding on how to implement a more advanced strategy,
-have a look at the :py:class:`BasicConsolidation` class.
-
-.. _pbr: http://docs.openstack.org/developer/pbr/
-
-Using strategy plugins
-----------------------
-
-The Watcher Decision Engine service will automatically discover any installed
-plugins when it is run. If a Python package containing a custom plugin is
-installed within the same environment as Watcher, Watcher will automatically
-make that plugin available for use.
-
-At this point, the way Watcher will use your new strategy if you reference it
-in the ``goals`` under the ``[watcher_goals]`` section of your ``watcher.conf``
-configuration file. For example, if you want to use a ``dummy`` strategy you
-just installed, you would have to associate it to a goal like this:
-
-.. code-block:: ini
-
-    [watcher_goals]
-    goals = BALANCE_LOAD:basic,MINIMIZE_ENERGY_CONSUMPTION:dummy
-
-
-You should take care when installing strategy plugins. By their very nature,
-there are no guarantees that utilizing them as is will be supported, as
-they may require a set of metrics which is not yet available within the
-Telemetry service. In such a case, please do make sure that you first
-check/configure the latter so your new strategy can be fully functional.
-
-Querying metrics
-~~~~~~~~~~~~~~~~
-
-The metrics available depend on the hypervisors that OpenStack manages on
-the specific implementation. You can find the metrics available per hypervisor
-and OpenStack release on the OpenStack site.
-
-There are different possible ways to obtain usage metrics in Watcher, you can
-use the default Ceilometer API or our Helper.
-The Helper attempted to make the Ceilometer API more reusable and easy to use.
-
-Read usage metrics using the Python binding
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-You can find the information about the Ceilometer Python binding on the
-OpenStack `ceilometer client python API documentation
-<http://docs.openstack.org/developer/python-ceilometerclient/api.html>`_
-
-The first step is to authenticate against the Ceilometer service
-(assuming that you already imported the Ceilometer client for Python)
-with this call:
-
-.. code-block:: py
-
- cclient = ceilometerclient.client.get_client(VERSION, os_username=USERNAME,
-  os_password=PASSWORD, os_tenant_name=PROJECT_NAME, os_auth_url=AUTH_URL)
-
-Using that you can now query the values for that specific metric:
-
-.. code-block:: py
-
- value_cpu = cclient.samples.list(meter_name='cpu_util', limit=10, q=query)
-
-Read usage metrics using the Watcher Cluster History Helper
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Here below is the abstract ``BaseClusterHistory`` class of the Helper.
-
-.. automodule:: watcher.metrics_engine.cluster_history.api
-    :noindex:
-
-.. autoclass:: BaseClusterHistory
-    :members:
-
-
-The following snippet code shows how to create a Cluster History class:
-
-.. code-block:: py
-
-    query_history  = CeilometerClusterHistory()
-
-Using that you can now query the values for that specific metric:
-
-.. code-block:: py
-
-    query_history.statistic_aggregation(resource_id=hypervisor.uuid,
-                                  meter_name='compute.node.cpu.percent',
-                                  period="7200",
-                                  aggregate='avg'
-                                  )
 
+.. drivers-doc:: watcher_planners

doc/source/dev/testing.rst

@@ -0,0 +1,50 @@
+..
+      Except where otherwise noted, this document is licensed under Creative
+      Commons Attribution 3.0 License.  You can view the license at:
+
+          https://creativecommons.org/licenses/by/3.0/
+
+=======
+Testing
+=======
+
+.. _unit_tests:
+
+Unit tests
+==========
+
+All unit tests should be run using `tox`_. To run the same unit tests that are
+executing onto `Gerrit`_ which includes ``py34``, ``py27`` and ``pep8``, you
+can issue the following command::
+
+    $ workon watcher
+    (watcher) $ pip install tox
+    (watcher) $ cd watcher
+    (watcher) $ tox
+
+If you want to only run one of the aforementioned, you can then issue one of
+the following::
+
+    $ workon watcher
+    (watcher) $ tox -e py34
+    (watcher) $ tox -e py27
+    (watcher) $ tox -e pep8
+
+.. _tox: https://tox.readthedocs.org/
+.. _Gerrit: http://review.openstack.org/
+
+You may pass options to the test programs using positional arguments. To run a
+specific unit test, you can pass extra options to `os-testr`_ after putting
+the ``--`` separator. So using the ``-r`` option followed by a regex string,
+you can run the desired test::
+
+    $ workon watcher
+    (watcher) $ tox -e py27 -- -r watcher.tests.api
+
+.. _os-testr: http://docs.openstack.org/developer/os-testr/
+
+When you're done, deactivate the virtualenv::
+
+    $ deactivate
+
+.. include:: ../../../watcher_tempest_plugin/README.rst

doc/source/glossary.rst

@@ -4,9 +4,9 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-==========
+========
- Glossary
+Glossary
-==========
+========
 
 .. glossary::
    :sorted:
@@ -20,97 +20,14 @@ They are sorted in alphabetical order.
 Action
 ======
 
-An :ref:`Action <action_definition>` is what enables Watcher to transform the
+.. watcher-term:: watcher.api.controllers.v1.action
-current state of a :ref:`Cluster <cluster_definition>` after an
-:ref:`Audit <audit_definition>`.
-
-An :ref:`Action <action_definition>` is an atomic task which changes the
-current state of a target :ref:`Managed resource <managed_resource_definition>`
-of the OpenStack :ref:`Cluster <cluster_definition>` such as:
-
--  Live migration of an instance from one compute node to another compute
-   node with Nova
--  Changing the power level of a compute node (ACPI level, ...)
--  Changing the current state of an hypervisor (enable or disable) with Nova
-
-In most cases, an :ref:`Action <action_definition>` triggers some concrete
-commands on an existing OpenStack module (Nova, Neutron, Cinder, Ironic, etc.)
-via a :ref:`Primitive <primitive_definition>`.
-
-An :ref:`Action <action_definition>` has a life-cycle and its current state may
-be one of the following:
-
--  **PENDING** : the :ref:`Action <action_definition>` has not been executed
-   yet by the :ref:`Watcher Applier <watcher_applier_definition>`
--  **ONGOING** : the :ref:`Action <action_definition>` is currently being
-   processed by the :ref:`Watcher Applier <watcher_applier_definition>`
--  **SUCCEEDED** : the :ref:`Action <action_definition>` has been executed
-   successfully
--  **FAILED** : an error occured while trying to execute the
-   :ref:`Action <action_definition>`
--  **DELETED** : the :ref:`Action <action_definition>` is still stored in the
-   :ref:`Watcher database <watcher_database_definition>` but is not returned
-   any more through the Watcher APIs.
--  **CANCELLED** : the :ref:`Action <action_definition>` was in **PENDING** or
-   **ONGOING** state and was cancelled by the
-   :ref:`Administrator <administrator_definition>`
 
 .. _action_plan_definition:
 
 Action Plan
 ===========
 
-An :ref:`Action Plan <action_plan_definition>` is a flow of
+.. watcher-term:: watcher.api.controllers.v1.action_plan
-:ref:`Actions <action_definition>` that should be executed in order to satisfy
-a given :ref:`Goal <goal_definition>`.
-
-An :ref:`Action Plan <action_plan_definition>` is generated by Watcher when an
-:ref:`Audit <audit_definition>` is successful which implies that the
-:ref:`Strategy <strategy_definition>`
-which was used has found a :ref:`Solution <solution_definition>` to achieve the
-:ref:`Goal <goal_definition>` of this :ref:`Audit <audit_definition>`.
-
-In the default implementation of Watcher, an
-:ref:`Action Plan <action_plan_definition>`
-is only composed of successive :ref:`Actions <action_definition>`
-(i.e., a Workflow of :ref:`Actions <action_definition>` belonging to a unique
-branch).
-
-However, Watcher provides abstract interfaces for many of its components,
-allowing other implementations to generate and handle more complex
-:ref:`Action Plan(s) <action_plan_definition>`
-composed of two types of Action Item(s):
-
--  simple :ref:`Actions <action_definition>`: atomic tasks, which means it
-   can not be split into smaller tasks or commands from an OpenStack point of
-   view.
--  composite Actions: which are composed of several simple
-   :ref:`Actions <action_definition>`
-   ordered in sequential and/or parallel flows.
-
-An :ref:`Action Plan <action_plan_definition>` may be described using
-standard workflow model description formats such as
-`Business Process Model and Notation 2.0 (BPMN 2.0) <http://www.omg.org/spec/BPMN/2.0/>`_
-or `Unified Modeling Language (UML) <http://www.uml.org/>`_.
-
-An :ref:`Action Plan <action_plan_definition>` has a life-cycle and its current
-state may be one of the following:
-
--  **RECOMMENDED** : the :ref:`Action Plan <action_plan_definition>` is waiting
-   for a validation from the :ref:`Administrator <administrator_definition>`
--  **ONGOING** : the :ref:`Action Plan <action_plan_definition>` is currently
-   being processed by the :ref:`Watcher Applier <watcher_applier_definition>`
--  **SUCCEEDED** : the :ref:`Action Plan <action_plan_definition>` has been
-   executed successfully (i.e. all :ref:`Actions <action_definition>` that it
-   contains have been executed successfully)
--  **FAILED** : an error occured while executing the
-   :ref:`Action Plan <action_plan_definition>`
--  **DELETED** : the :ref:`Action Plan <action_plan_definition>` is still
-   stored in the :ref:`Watcher database <watcher_database_definition>` but is
-   not returned any more through the Watcher APIs.
--  **CANCELLED** : the :ref:`Action Plan <action_plan_definition>` was in
-   **PENDING** or **ONGOING** state and was cancelled by the
-   :ref:`Administrator <administrator_definition>`
 
 .. _administrator_definition:
 
@@ -144,73 +61,14 @@ any Watcher configuration files and to restart Watcher services.
 Audit
 =====
 
-In the Watcher system, an :ref:`Audit <audit_definition>` is a request for
+.. watcher-term:: watcher.api.controllers.v1.audit
-optimizing a :ref:`Cluster <cluster_definition>`.
-
-The optimization is done in order to satisfy one :ref:`Goal <goal_definition>`
-on a given :ref:`Cluster <cluster_definition>`.
-
-For each :ref:`Audit <audit_definition>`, the Watcher system generates an
-:ref:`Action Plan <action_plan_definition>`.
-
-An :ref:`Audit <audit_definition>` has a life-cycle and its current state may
-be one of the following:
-
--  **PENDING** : a request for an :ref:`Audit <audit_definition>` has been
-   submitted (either manually by the
-   :ref:`Administrator <administrator_definition>` or automatically via some
-   event handling mechanism) and is in the queue for being processed by the
-   :ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
--  **ONGOING** : the :ref:`Audit <audit_definition>` is currently being
-   processed by the
-   :ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
--  **SUCCEEDED** : the :ref:`Audit <audit_definition>` has been executed
-   successfully (note that it may not necessarily produce a
-   :ref:`Solution <solution_definition>`).
--  **FAILED** : an error occured while executing the
-   :ref:`Audit <audit_definition>`
--  **DELETED** : the :ref:`Audit <audit_definition>` is still stored in the
-   :ref:`Watcher database <watcher_database_definition>` but is not returned
-   any more through the Watcher APIs.
--  **CANCELLED** : the :ref:`Audit <audit_definition>` was in **PENDING** or
-   **ONGOING** state and was cancelled by the
-   :ref:`Administrator <administrator_definition>`
 
 .. _audit_template_definition:
 
 Audit Template
 ==============
 
-An :ref:`Audit <audit_definition>` may be launched several times with the same
+.. watcher-term:: watcher.api.controllers.v1.audit_template
-settings (:ref:`Goal <goal_definition>`, thresholds, ...). Therefore it makes
-sense to save those settings in some sort of Audit preset object, which is
-known as an :ref:`Audit Template <audit_template_definition>`.
-
-An :ref:`Audit Template <audit_template_definition>` contains at least the
-:ref:`Goal <goal_definition>` of the :ref:`Audit <audit_definition>`.
-
-It may also contain some error handling settings indicating whether:
-
--  :ref:`Watcher Applier <watcher_applier_definition>` stops the
-   entire operation
--  :ref:`Watcher Applier <watcher_applier_definition>` performs a rollback
-
-and how many retries should be attempted before failure occurs (also the latter
-can be complex: for example the scenario in which there are many first-time
-failures on ultimately successful :ref:`Actions <action_definition>`).
-
-Moreover, an :ref:`Audit Template <audit_template_definition>` may contain some
-settings related to the level of automation for the
-:ref:`Action Plan <action_plan_definition>` that will be generated by the
-:ref:`Audit <audit_definition>`.
-A flag will indicate whether the :ref:`Action Plan <action_plan_definition>`
-will be launched automatically or will need a manual confirmation from the
-:ref:`Administrator <administrator_definition>`.
-
-Last but not least, an :ref:`Audit Template <audit_template_definition>` may
-contain a list of extra parameters related to the
-:ref:`Strategy <strategy_definition>` configuration. These parameters can be
-provided as a list of key-value pairs.
 
 .. _availability_zone_definition:
 
@@ -241,136 +99,14 @@ The :ref:`Cluster <cluster_definition>` may be divided in one or several
 Cluster Data Model
 ==================
 
-A :ref:`Cluster Data Model <cluster_data_model_definition>` is a logical
+.. watcher-term:: watcher.metrics_engine.cluster_model_collector.api
-representation of the current state and topology of the
-:ref:`Cluster <cluster_definition>`
-:ref:`Managed resources <managed_resource_definition>`.
-
-It is represented as a set of
-:ref:`Managed resources <managed_resource_definition>`
-(which may be a simple tree or a flat list of key-value pairs)
-which enables Watcher :ref:`Strategies <strategy_definition>` to know the
-current relationships between the different
-:ref:`resources <managed_resource_definition>`) of the
-:ref:`Cluster <cluster_definition>` during an :ref:`Audit <audit_definition>`
-and enables the :ref:`Strategy <strategy_definition>` to request information
-such as:
-
--  What compute nodes are in a given
-:ref:`Availability Zone <availability_zone_definition>`
-   or a given :ref:`Host Aggregate <host_aggregates_definition>` ?
--  What :ref:`Instances <instance_definition>` are hosted on a given compute
-   node ?
--  What is the current load of a compute node ?
--  What is the current free memory of a compute node ?
--  What is the network link between two compute nodes ?
--  What is the available bandwidth on a given network link ?
--  What is the current space available on a given virtual disk of a given
-   :ref:`Instance <instance_definition>` ?
--  What is the current state of a given :ref:`Instance <instance_definition>`?
--  ...
-
-In a word, this data model enables the :ref:`Strategy <strategy_definition>`
-to know:
-
--  the current topology of the :ref:`Cluster <cluster_definition>`
--  the current capacity for each
-   :ref:`Managed resource <managed_resource_definition>`
--  the current amount of used/free space for each
-   :ref:`Managed resource <managed_resource_definition>`
--  the current state of each
-   :ref:`Managed resources <managed_resource_definition>`
-
-In the Watcher project, we aim at providing a generic and very basic
-:ref:`Cluster Data Model <cluster_data_model_definition>` for each
-:ref:`Goal <goal_definition>`, usable in the associated
-:ref:`Strategies <strategy_definition>` through some helper classes in order
-to:
-
--  simplify the development of a new
-   :ref:`Strategy <strategy_definition>` for a given
-   :ref:`Goal <goal_definition>` when there already are some existing
-   :ref:`Strategies <strategy_definition>` associated to the same
-   :ref:`Goal <goal_definition>`
--  avoid duplicating the same code in several
-   :ref:`Strategies <strategy_definition>` associated to the same
-   :ref:`Goal <goal_definition>`
--  have a better consistency between the different
-   :ref:`Strategies <strategy_definition>` for a given
-   :ref:`Goal <goal_definition>`
--  avoid any strong coupling with any external
-   :ref:`Cluster Data Model <cluster_data_model_definition>`
-   (the proposed data model acts as a pivot data model)
-
-There may be various
-:ref:`generic and basic Cluster Data Models <cluster_data_model_definition>`
-proposed in Watcher helpers, each of them being adapted to achieving a given
-:ref:`Goal <goal_definition>`:
-
--  For example, for a
-   :ref:`Goal <goal_definition>` which aims at optimizing the network
-   :ref:`resources <managed_resource_definition>` the
-   :ref:`Strategy <strategy_definition>` may need to know which
-   :ref:`resources <managed_resource_definition>` are communicating together.
--  Whereas for a :ref:`Goal <goal_definition>` which aims at optimizing thermal
-   and power conditions, the :ref:`Strategy <strategy_definition>` may need to
-   know the location of each compute node in the racks and the location of each
-   rack in the room.
-
-Note however that a developer can use his/her own
-:ref:`Cluster Data Model <cluster_data_model_definition>` if the proposed data
-model does not fit his/her needs as long as the
-:ref:`Strategy <strategy_definition>` is able to produce a
-:ref:`Solution <solution_definition>` for the requested
-:ref:`Goal <goal_definition>`.
-For example, a developer could rely on the Nova Data Model to optimize some
-compute resources.
-
-The :ref:`Cluster Data Model <cluster_data_model_definition>` may be persisted
-in any appropriate storage system (SQL database, NoSQL database, JSON file,
-XML File, In Memory Database, ...).
 
 .. _cluster_history_definition:
 
 Cluster History
 ===============
 
-The :ref:`Cluster History <cluster_history_definition>` contains all the
+.. watcher-term:: watcher.metrics_engine.cluster_history.api
-previously collected timestamped data such as metrics and events associated
-to any :ref:`managed resource <managed_resource_definition>` of the
-:ref:`Cluster <cluster_definition>`.
-
-Just like the :ref:`Cluster Data Model <cluster_data_model_definition>`, this
-history may be used by any :ref:`Strategy <strategy_definition>` in order to
-find the most optimal :ref:`Solution <solution_definition>` during an
-:ref:`Audit <audit_definition>`.
-
-In the Watcher project, a generic
-:ref:`Cluster History <cluster_history_definition>`
-API is proposed with some helper classes in order to :
-
--  share a common measurement (events or metrics) naming based on what is
-   defined in Ceilometer.
-   See `the full list of available measurements <http://docs.openstack.org/admin-guide-cloud/telemetry-measurements.html>`_
--  share common meter types (Cumulative, Delta, Gauge) based on what is
-   defined in Ceilometer.
-   See `the full list of meter types <http://docs.openstack.org/admin-guide-cloud/telemetry-measurements.html>`_
--  simplify the development of a new :ref:`Strategy <strategy_definition>`
--  avoid duplicating the same code in several
-:ref:`Strategies <strategy_definition>`
--  have a better consistency between the different
-:ref:`Strategies <strategy_definition>`
--  avoid any strong coupling with any external metrics/events storage system
-   (the proposed API and measurement naming system acts as a pivot format)
-
-Note however that a developer can use his/her own history management system if
-the Ceilometer system does not fit his/her needs as long as the
-:ref:`Strategy <strategy_definition>` is able to produce a
-:ref:`Solution <solution_definition>` for the requested
-:ref:`Goal <goal_definition>`.
-
-The :ref:`Cluster History <cluster_history_definition>` data may be persisted
-in any appropriate storage system (InfluxDB, OpenTSDB, MongoDB,...).
 
 .. _controller_node_definition:
 
@@ -419,20 +155,7 @@ them, or at least reported to them.
 Goal
 ====
 
-A :ref:`Goal <goal_definition>` is a human readable, observable and measurable
+.. watcher-term:: watcher.api.controllers.v1.goal
-end result having one objective to be achieved.
-
-Here are some examples of :ref:`Goals <goal_definition>`:
-
--  minimize the energy consumption
--  minimize the number of compute nodes (consolidation)
--  balance the workload among compute nodes
--  minimize the license cost (some softwares have a licensing model which is
-   based on the number of sockets or cores where the software is deployed)
--  find the most appropriate moment for a planned maintenance on a
-   given group of host (which may be an entire availability zone):
-   power supply replacement, cooling system replacement, hardware
-   modification, ...
 
 
 .. _host_aggregates_definition:
@@ -490,27 +213,27 @@ Here are some examples of
 
 It can be any of the `the official list of available resource types defined in OpenStack for HEAT <http://docs.openstack.org/developer/heat/template_guide/openstack.html>`_.
 
-.. _efficiency_definition:
+.. _efficacy_definition:
 
-Optimization Efficiency
+Optimization Efficacy
-=======================
+=====================
 
-The :ref:`Optimization Efficiency <efficiency_definition>` is the objective
+The :ref:`Optimization Efficacy <efficacy_definition>` is the objective
 measure of how much of the :ref:`Goal <goal_definition>` has been achieved in
 respect with constraints and :ref:`SLAs <sla_definition>` defined by the
 :ref:`Customer <customer_definition>`.
 
-The way efficiency is evaluated will depend on the
+The way efficacy is evaluated will depend on the
 :ref:`Goal <goal_definition>` to achieve.
 
-Of course, the efficiency will be relevant only as long as the
+Of course, the efficacy will be relevant only as long as the
 :ref:`Action Plan <action_plan_definition>` is relevant
 (i.e., the current state of the :ref:`Cluster <cluster_definition>`
 has not changed in a way that a new :ref:`Audit <audit_definition>` would need
 to be launched).
 
 For example, if the :ref:`Goal <goal_definition>` is to lower the energy
-consumption, the :ref:`Efficiency <efficiency_definition>` will be computed
+consumption, the :ref:`Efficacy <efficacy_definition>` will be computed
 using several indicators (KPIs):
 
 -  the percentage of energy gain (which must be the highest possible)
@@ -521,7 +244,7 @@ using several indicators (KPIs):
 All those indicators (KPIs) are computed within a given timeframe, which is the
 time taken to execute the whole :ref:`Action Plan <action_plan_definition>`.
 
-The efficiency also enables the :ref:`Administrator <administrator_definition>`
+The efficacy also enables the :ref:`Administrator <administrator_definition>`
 to objectively compare different :ref:`Strategies <strategy_definition>` for
 the same goal and same workload of the :ref:`Cluster <cluster_definition>`.
 
@@ -539,23 +262,6 @@ specific domain.
 Please, read `the official OpenStack definition of a Project <http://docs.openstack.org/glossary/content/glossary.html>`_.
 
 
-.. _primitive_definition
-
-Primitive
-=========
-
-A :ref:`Primitive <primitive_definition>` is the component that carries out a
-certain type of atomic :ref:`Actions <action_definition>` on a given
-:ref:`Managed resource <managed_resource_definition>` (nova, swift, neutron,
-glance,..). A :ref:`Primitive <primitive_definition>` is a part of the
-:ref:`Watcher Applier <watcher_applier_definition>` module.
-
-For example, there can be a :ref:`Primitive <primitive_definition>` which is
-responsible for creating a snapshot of a given instance on a Nova compute node.
-This :ref:`Primitive <primitive_definition>` knows exactly how to send
-the appropriate commands to Nova for this type of
-:ref:`Actions <action_definition>`.
-
 .. _sla_definition:
 
 SLA
@@ -610,67 +316,21 @@ which provides a good definition.
 Solution
 ========
 
-A :ref:`Solution <solution_definition>` is a set of
+.. watcher-term:: watcher.decision_engine.solution.base
-:ref:`Actions <action_definition>` generated by a
-:ref:`Strategy <strategy_definition>` (i.e., an algorithm) in order to achieve
-the :ref:`Goal <goal_definition>` of an :ref:`Audit <audit_definition>`.
-
-A :ref:`Solution <solution_definition>` is different from an
-:ref:`Action Plan <action_plan_definition>` because it contains the
-non-scheduled list of :ref:`Actions <action_definition>` which is produced by a
-:ref:`Strategy <strategy_definition>`. In other words, the list of Actions in
-a :ref:`Solution <solution_definition>` has not yet been re-ordered by the
-:ref:`Watcher Planner <watcher_planner_definition>`.
-
-Note that some algorithms (i.e. :ref:`Strategies <strategy_definition>`) may
-generate several :ref:`Solutions <solution_definition>`. This gives rise to the
-problem of determining which :ref:`Solution <solution_definition>` should be
-applied.
-
-Two approaches to dealing with this can be envisaged:
-
--  **fully automated mode**: only the :ref:`Solution <solution_definition>`
- with the highest ranking (i.e., the highest
-   :ref:`Optimization Efficiency <efficiency_definition>`)
-   will be sent to the :ref:`Watcher Planner <watcher_planner_definition>` and
-   translated into concrete :ref:`Actions <action_definition>`.
--  **manual mode**: several :ref:`Solutions <solution_definition>` are proposed
-   to the :ref:`Administrator <administrator_definition>` with a detailed
-   measurement of the estimated
-   :ref:`Optimization Efficiency <efficiency_definition>` and he/she decides
-   which one will be launched.
 
 .. _strategy_definition:
 
 Strategy
 ========
 
-A :ref:`Strategy <strategy_definition>` is an algorithm implementation which is
+.. watcher-term::  watcher.decision_engine.strategy.strategies.base
-able to find a :ref:`Solution <solution_definition>` for a given
-:ref:`Goal <goal_definition>`.
-
-There may be several potential strategies which are able to achieve the same
-:ref:`Goal <goal_definition>`. This is why it is possible to configure which
-specific :ref:`Strategy <strategy_definition>` should be used for each
-:ref:`Goal <goal_definition>`.
-
-Some strategies may provide better optimization results but may take more time
-to find an optimal :ref:`Solution <solution_definition>`.
-
-When a new :ref:`Goal <goal_definition>` is added to the Watcher configuration,
-at least one default associated :ref:`Strategy <strategy_definition>` should be
-provided as well.
 
 .. _watcher_applier_definition:
 
 Watcher Applier
 ===============
 
-This component is in charge of executing the
+.. watcher-term:: watcher.applier.base
-:ref:`Action Plan <action_plan_definition>` built by the
-:ref:`Watcher Decision Engine <watcher_decision_engine_definition>`.
-
-See :doc:`architecture` for more details on this component.
 
 .. _watcher_database_definition:
 
@@ -696,47 +356,12 @@ See :doc:`architecture` for more details on this component.
 Watcher Decision Engine
 =======================
 
-This component is responsible for computing a set of potential optimization
+.. watcher-term::  watcher.decision_engine.manager
-:ref:`Actions <action_definition>` in order to fulfill the
-:ref:`Goal <goal_definition>` of an :ref:`Audit <audit_definition>`.
-
-It first reads the parameters of the :ref:`Audit <audit_definition>` from the
-associated :ref:`Audit Template <audit_template_definition>` and knows the
-:ref:`Goal <goal_definition>` to achieve.
-
-It then selects the most appropriate :ref:`Strategy <strategy_definition>`
-depending on how Watcher was configured for this :ref:`Goal <goal_definition>`.
-
-The :ref:`Strategy <strategy_definition>` is then executed and generates a set
-of :ref:`Actions <action_definition>` which are scheduled in time by the
-:ref:`Watcher Planner <watcher_planner_definition>` (i.e., it generates an
-:ref:`Action Plan <action_plan_definition>`).
-
-See :doc:`architecture` for more details on this component.
 
 .. _watcher_planner_definition:
 
 Watcher Planner
 ===============
 
-The :ref:`Watcher Planner <watcher_planner_definition>` is part of the
+.. watcher-term:: watcher.decision_engine.planner.base
-:ref:`Watcher Decision Engine <watcher_decision_engine_definition>`.
-
-This module takes the set of :ref:`Actions <action_definition>` generated by a
-:ref:`Strategy <strategy_definition>` and builds the design of a workflow which
-defines how-to schedule in time those different
-:ref:`Actions <action_definition>` and for each
-:ref:`Action <action_definition>` what are the prerequisite conditions.
-
-It is important to schedule :ref:`Actions <action_definition>` in time in order
-to prevent overload of the :ref:`Cluster <cluster_definition>` while applying
-the :ref:`Action Plan <action_plan_definition>`. For example, it is important
-not to migrate too many instances at the same time in order to avoid a network
-congestion which may decrease the :ref:`SLA <sla_definition>` for
-:ref:`Customers <customer_definition>`.
-
-It is also important to schedule :ref:`Actions <action_definition>` in order to
-avoid security issues such as denial of service on core OpenStack services.
-
-See :doc:`architecture` for more details on this component.
 

doc/source/image_src/plantuml/action_plan_state_machine.txt

@@ -0,0 +1,16 @@
+@startuml
+
+[*] --> RECOMMENDED: The Watcher Planner\ncreates the Action Plan
+RECOMMENDED --> PENDING: Adminisrator launches\nthe Action Plan
+PENDING --> ONGOING: The Watcher Applier receives the request\nto launch the Action Plan
+ONGOING --> FAILED: Something failed while executing\nthe Action Plan in the Watcher Applier
+ONGOING --> SUCCEEDED: The Watcher Applier executed\nthe Action Plan successfully
+FAILED --> DELETED : Administrator removes\nAction Plan
+SUCCEEDED --> DELETED : Administrator removes\nAction Plan
+ONGOING --> CANCELLED : Administrator cancels\nAction Plan
+RECOMMENDED --> CANCELLED : Administrator cancels\nAction Plan
+PENDING --> CANCELLED : Administrator cancels\nAction Plan
+CANCELLED --> DELETED
+DELETED --> [*]
+
+@enduml

doc/source/image_src/plantuml/audit_state_machine.txt

@@ -0,0 +1,14 @@
+@startuml
+
+[*] --> PENDING: Audit requested by Administrator
+PENDING --> ONGOING: Audit request is received\nby the Watcher Decision Engine
+ONGOING --> FAILED: Audit fails\n(no solution found, technical error, ...)
+ONGOING --> SUCCEEDED: The Watcher Decision Engine\ncould find at least one Solution
+FAILED --> DELETED : Administrator wants to\narchive/delete the Audit
+SUCCEEDED --> DELETED : Administrator wants to\narchive/delete the Audit
+PENDING --> CANCELLED : Administrator cancels\nthe Audit
+ONGOING --> CANCELLED : Administrator cancels\nthe Audit
+CANCELLED --> DELETED : Administrator wants to\narchive/delete the Audit
+DELETED --> [*]
+
+@enduml

doc/source/image_src/plantuml/sequence_create_and_launch_audit.txt

@@ -0,0 +1,24 @@
+@startuml
+
+
+actor Administrator
+
+Administrator -> "Watcher CLI" : watcher audit-create -a <audit_template_uuid>
+
+"Watcher CLI" -> "Watcher API" : POST audit(parameters)
+"Watcher API" -> "Watcher Database" : create new audit in database (status=PENDING)
+
+"Watcher API" <-- "Watcher Database" : new audit uuid
+"Watcher CLI" <-- "Watcher API" : return new audit URL
+
+Administrator <-- "Watcher CLI" : new audit uuid
+
+"Watcher API" -> "AMQP Bus" : trigger_audit(new_audit.uuid)
+"AMQP Bus" -> "Watcher Decision Engine" : trigger_audit(new_audit.uuid)
+
+ref over "Watcher Decision Engine"
+  Trigger audit in the
+  Watcher Decision Engine
+end ref
+
+@enduml

doc/source/image_src/plantuml/sequence_create_audit_template.txt

@@ -0,0 +1,16 @@
+@startuml
+
+actor Administrator
+
+Administrator -> "Watcher CLI" : watcher audit-template-create <name> <goal>
+"Watcher CLI" -> "Watcher API" : POST audit_template(parameters)
+
+"Watcher API" -> "Watcher API" : make sure goal exist in configuration
+"Watcher API" -> "Watcher Database" : create new audit_template in database
+
+"Watcher API" <-- "Watcher Database" : new audit template uuid
+"Watcher CLI" <-- "Watcher API" : return new audit template URL in HTTP Location Header
+Administrator <-- "Watcher CLI" : new audit template uuid
+
+@enduml
+

doc/source/image_src/plantuml/sequence_launch_action_plan.txt

@@ -0,0 +1,23 @@
+@startuml
+
+actor Administrator
+
+Administrator -> "Watcher CLI" : watcher action-plan-start <action_plan_uuid>
+
+"Watcher CLI" -> "Watcher API" : PATCH action_plan(state=TRIGGERED)
+"Watcher API" -> "Watcher Database" : action_plan.state=TRIGGERED
+
+"Watcher CLI" <-- "Watcher API" : HTTP 200
+
+Administrator <-- "Watcher CLI" : OK
+
+"Watcher API" -> "AMQP Bus" : launch_action_plan(action_plan.uuid)
+"AMQP Bus" -> "Watcher Applier" : launch_action_plan(action_plan.uuid)
+
+ref over "Watcher Applier"
+  Launch Action Plan in the
+  Watcher Applier
+end ref
+
+@enduml
+

doc/source/image_src/plantuml/sequence_launch_action_plan_in_applier.txt

@@ -0,0 +1,31 @@
+@startuml
+
+"AMQP Bus" -> "Watcher Applier" : launch_action_plan(action_plan.uuid)
+"Watcher Applier" -> "Watcher Database" : action_plan.state=ONGOING
+"Watcher Applier" -[#blue]> "AMQP Bus" : notify action plan state = ONGOING
+"Watcher Applier" -> "Watcher Database" : get_action_list(action_plan.uuid)
+"Watcher Applier" <-- "Watcher Database" : actions
+loop for each action of the action flow
+create Action
+"Watcher Applier" -> Action : instantiate Action object with target resource id\n and input parameters
+"Watcher Applier" -> Action : validate_parameters()
+"Watcher Applier" <-- Action : OK
+"Watcher Applier" -[#blue]> "AMQP Bus" : notify action state = ONGOING
+"Watcher Applier" -> Action : preconditions()
+"Watcher Applier" <-- Action : OK
+"Watcher Applier" -> Action : execute()
+alt action is "migrate instance"
+Action -> "Nova API" : migrate(instance_id, dest_host_id)
+Action <-- "Nova API" : OK
+else action is "disable hypervisor"
+Action -> "Nova API" : host-update(host_id, maintenance=true)
+Action <-- "Nova API" : OK
+end
+"Watcher Applier" <-- Action : OK
+"Watcher Applier" -> "Watcher Database" : action.state=SUCCEEDED
+"Watcher Applier" -[#blue]> "AMQP Bus" : notify action state = SUCCEEDED
+end
+"Watcher Applier" -> "Watcher Database" : action_plan.state=SUCCEEDED
+"Watcher Applier" -[#blue]> "AMQP Bus" : notify action plan state = SUCCEEDED
+
+@enduml

doc/source/image_src/plantuml/sequence_overview_watcher_usage.txt

@@ -0,0 +1,37 @@
+@startuml
+
+actor Administrator
+
+== Create some Audit settings ==
+
+Administrator -> Watcher : create new Audit Template (i.e. Audit settings : goal, scope, deadline,...)
+Watcher -> Watcher : save Audit Template in database
+Administrator <-- Watcher : Audit Template UUID
+
+== Launch a new Audit ==
+
+Administrator -> Watcher : launch new Audit of the Openstack infrastructure resources\nwith a previously created Audit Template
+Administrator <-- Watcher : Audit UUID
+Administrator -> Watcher : get the Audit state
+Administrator <-- Watcher : ONGOING
+Watcher -> Watcher : compute a solution to achieve optimization goal
+Administrator -> Watcher : get the Audit state
+Administrator <-- Watcher : SUCCEEDED
+
+== Get the result of the Audit ==
+
+Administrator -> Watcher : get Action Plan
+Administrator <-- Watcher : recommended Action Plan and estimated efficacy
+Administrator -> Administrator : verify the recommended actions\nand evaluate the estimated gain vs aggressiveness of the solution
+
+== Launch the recommended Action Plan ==
+
+Administrator -> Watcher : launch the Action Plan
+Administrator <-- Watcher : Action Plan has been launched
+Watcher -> Watcher : trigger Actions on Openstack services
+Administrator -> Watcher : get the Action Plan state
+Administrator <-- Watcher : ONGOING
+Administrator -> Watcher : get the Action Plan state
+Administrator <-- Watcher : SUCCEEDED
+
+@enduml

doc/source/image_src/plantuml/sequence_trigger_audit_in_decision_engine.txt

@@ -0,0 +1,31 @@
+@startuml
+
+"AMQP Bus" -> "Watcher Decision Engine"  : trigger_audit(new_audit.uuid)
+"Watcher Decision Engine" -> "Watcher Database" : update audit.state = ONGOING
+"AMQP Bus" <[#blue]- "Watcher Decision Engine" : notify new audit state = ONGOING
+"Watcher Decision Engine" -> "Watcher Database" : get audit parameters(goal, ...)
+"Watcher Decision Engine" <-- "Watcher Database" : audit parameters(goal, ...)
+create Strategy
+"Watcher Decision Engine" -[#red]> "Strategy": select appropriate\noptimization strategy
+loop while enough data to build cluster data model
+  "Watcher Decision Engine" -> "Nova API" : get resource state (host, instance, ...)
+  "Watcher Decision Engine" <-- "Nova API" : resource state
+end
+"Watcher Decision Engine" -[#red]> "Watcher Decision Engine": build cluster_data_model
+"Watcher Decision Engine" -> "Strategy" : execute(cluster_data_model)
+loop while enough history data for the strategy
+"Strategy" -> "Ceilometer API": get_aggregated_metrics\n(resource_id,meter_name,period,aggregate_method)
+"Strategy" <-- "Ceilometer API": aggregated metrics
+end
+"Strategy" -> "Strategy" : compute solution to achieve goal
+"Watcher Decision Engine" <-- "Strategy" : solution = array of actions (i.e. not scheduled yet)
+create "Watcher Planner"
+"Watcher Decision Engine" -[#red]> "Watcher Planner": select appropriate actions scheduler (i.e. Planner implementation)
+"Watcher Decision Engine" -> "Watcher Planner": schedule(audit_id, solution)
+"Watcher Planner" -> "Watcher Planner": schedule actions according to\nscheduling rules/policies
+"Watcher Decision Engine" <-- "Watcher Planner": new action_plan
+"Watcher Decision Engine" -> "Watcher Database" : save new action_plan in database
+"Watcher Decision Engine" -> "Watcher Database" : update audit.state = SUCCEEDED
+"AMQP Bus" <[#blue]- "Watcher Decision Engine" : notify new audit state = SUCCEEDED
+
+@enduml

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@@ -41,36 +41,31 @@
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+  </g>
+  <g>
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+  <g>
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+    <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="495" y="367" width="112.45" height="28"/>
+    <text font-size="16" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="551.225" y="386">Action Plan</text>
+  </g>
+  <g>
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+    <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="682" y="471" width="67.45" height="28"/>
+    <text font-size="16" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="715.725" y="490">Action</text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="551.225,420.945 551.225,443 715.725,443 715.725,470.029 "/>
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+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="633.475" y="440">is composed of</text>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="562.225" y="407.773"></text>
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+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="805.725" y="514">Next action</text>
+    <polygon style="fill: #000000" points="850.075,514 850.075,506 858.075,510 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="753.45" y="511"></text>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="753.45" y="482"></text>
+  </g>
+  <g>
+    <ellipse style="fill: #ffffff" cx="1036" cy="219" rx="6" ry="6"/>
+    <ellipse style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" cx="1036" cy="219" rx="6" ry="6"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="1012" y1="231" x2="1060" y2="231"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="1036" y1="225" x2="1036" y2="255"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="1036" y1="255" x2="1012" y2="281"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="1036" y1="255" x2="1060" y2="281"/>
+    <text font-size="12.8" style="fill: #ff0000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="1036" y="304.9">
+      <tspan x="1036" y="304.9">Administrator</tspan>
+    </text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke-dasharray: 8; stroke: #000000" points="985.869,255 834.138,255 834.138,241 681.113,241 "/>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="693.76,236 677.76,241 693.76,246 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="836.138" y="245">Triggers</text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke-dasharray: 8; stroke: #000000" points="1038,192.993 882.3,192.993 882.3,113 725.305,113 "/>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="737.953,108 721.953,113 737.953,118 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="884.3" y="149.997">Defines Audit configuration in</text>
+  </g>
+  <g>
+    <ellipse style="fill: #ffffff" cx="103" cy="28" rx="6" ry="6"/>
+    <ellipse style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" cx="103" cy="28" rx="6" ry="6"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="79" y1="40" x2="127" y2="40"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="103" y1="34" x2="103" y2="64"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="103" y1="64" x2="79" y2="90"/>
+    <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #ff0000" x1="103" y1="64" x2="127" y2="90"/>
+    <text font-size="12.8" style="fill: #ff0000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="103" y="113.9">
+      <tspan x="103" y="113.9">Customer</tspan>
+    </text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke-dasharray: 8; stroke: #000000" points="137.683,64 300.75,64 300.75,133.295 "/>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="295.75,120.647 300.75,136.647 305.75,120.647 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="219.217" y="61">Consumes resources</text>
+  </g>
+  <g>
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+    <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="27" y="258" width="102.8" height="28"/>
+    <text font-size="16" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="78.4" y="277">Resources</text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="186.828,154 78.4,154 78.4,258 "/>
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+    <polygon style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="212,154 198,158.8 184,154 198,149.2 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="145.2" y="151"></text>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:end;font-family:monospace;font-style:normal;font-weight:normal" x="180" y="151"></text>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="82.4" y="254"></text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke-dasharray: 8; stroke: #000000" points="715.724,499 715.724,540 78.4,540 78.4,292.705 "/>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="83.4,305.353 78.4,289.353 73.4,305.353 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="397.062" y="537">Modifies</text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke-dasharray: 8; stroke: #000000" points="1036,309.94 1036,381 614.155,381 "/>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="626.803,376 610.803,381 626.803,386 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="821.725" y="378">Launches</text>
+  </g>
+  <g>
+    <rect style="fill: #ffffff" x="1082.9" y="43.1" width="88.25" height="28"/>
+    <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="1082.9" y="43.1" width="88.25" height="28"/>
+    <text font-size="16" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="1127.02" y="62.1">Strategy</text>
+  </g>
+  <g>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke-dasharray: 8; stroke: #000000" points="966.45,23 1020.17,23 1020.17,57.1 1075.22,57.1 "/>
+    <polyline style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" points="1062.57,62.1 1078.57,57.1 1062.57,52.1 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="1022.17" y="37.05">uses</text>
+  </g>
+</svg>

doc/source/index.rst

@@ -4,20 +4,34 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-============================================
+================================
-Welcome to Watcher's developer documentation
+Welcome to Watcher documentation
-============================================
+================================
 
-Mission
+OpenStack Watcher provides a flexible and scalable resource optimization
-=======
+service for multi-tenant OpenStack-based clouds.
+Watcher provides a complete optimization loop—including everything from a
+metrics receiver, complex event processor and profiler, optimization processor
+and an action plan applier. This provides a robust framework to realize a wide
+range of cloud optimization goals, including the reduction of data center
+operating costs, increased system performance via intelligent virtual machine
+migration, increased energy efficiency—and more!
 
-Provide an auditing service for OpenStack to improve workload placement
+Watcher project consists of several source code repositories:
-on-the-go.
 
-The developer documentation provided here is continually kept up-to-date based
+* `watcher`_ - is the main repository. It contains code for Watcher API server,
+  Watcher Decision Engine and Watcher Applier.
+* `python-watcherclient`_ - Client library and CLI client for Watcher.
+* `watcher-dashboard`_ - Watcher Horizon plugin.
+
+The documentation provided here is continually kept up-to-date based
 on the latest code, and may not represent the state of the project at any
 specific prior release.
 
+.. _watcher: https://git.openstack.org/cgit/openstack/watcher/
+.. _python-watcherclient: https://git.openstack.org/cgit/openstack/python-watcherclient/
+.. _watcher-dashboard: https://git.openstack.org/cgit/openstack/watcher-dashboard/
+
 Developer Guide
 ===============
 
@@ -29,11 +43,21 @@ Introduction
 
   glossary
   architecture
-  dev/environment
   dev/contributing
-  dev/plugins
 
 
+Getting Started
+---------------
+
+.. toctree::
+  :maxdepth: 1
+
+  dev/environment
+  dev/devstack
+  deploy/configuration
+  deploy/conf-files
+  dev/testing
+
 API References
 --------------
 
@@ -42,25 +66,48 @@ API References
 
   webapi/v1
 
+Plugins
+-------
+
+.. toctree::
+  :maxdepth: 1
+
+  dev/plugin/base-setup
+  dev/plugin/strategy-plugin
+  dev/plugin/action-plugin
+  dev/plugin/planner-plugin
+  dev/plugins
+
+
 Admin Guide
 ===========
 
-Overview
+Introduction
---------
+------------
 
 .. toctree::
   :maxdepth: 1
 
-  deploy/user-guide
   deploy/installation
+  deploy/user-guide
 
-Commands
+Watcher Manual Pages
---------
+====================
 
 .. toctree::
+   :glob:
    :maxdepth: 1
 
-  cmds/watcher-db-manage
+   man/*
+
+.. # NOTE(mriedem): This is the section where we hide things that we don't
+   # actually want in the table of contents but sphinx build would fail if
+   # they aren't in the toctree somewhere. For example, we hide api/autoindex
+   # since that's already covered with modindex below.
+.. toctree::
+   :hidden:
+
+   api/autoindex
 
 
 Indices and tables

doc/source/man/footer.rst

@@ -0,0 +1,5 @@
+BUGS
+====
+
+* Watcher bugs are tracked in Launchpad at `OpenStack Watcher
+  <http://bugs.launchpad.net/watcher>`__

doc/source/man/general-options.rst

@@ -0,0 +1,66 @@
+  **-h, --help**
+        Show the help message and exit
+
+  **--version**
+        Print the version number and exit
+
+  **-v, --verbose**
+        Print more verbose output
+
+  **--noverbose**
+        Disable verbose output
+
+  **-d, --debug**
+        Print debugging output (set logging level to DEBUG instead of
+        default WARNING level)
+
+  **--nodebug**
+        Disable debugging output
+
+  **--use-syslog**
+        Use syslog for logging
+
+  **--nouse-syslog**
+        Disable the use of syslog for logging
+
+  **--syslog-log-facility SYSLOG_LOG_FACILITY**
+        syslog facility to receive log lines
+
+  **--config-dir DIR**
+        Path to a config directory to pull \*.conf files from. This
+        file set is sorted, to provide a predictable parse order
+        if individual options are over-ridden. The set is parsed after
+        the file(s) specified via previous --config-file, arguments hence
+        over-ridden options in the directory take precedence. This means
+        that configuration from files in a specified config-dir will
+        always take precedence over configuration from files specified
+        by --config-file, regardless to argument order.
+
+  **--config-file PATH**
+        Path to a config file to use. Multiple config files can be
+        specified by using this flag multiple times, for example,
+        --config-file <file1> --config-file <file2>. Values in latter
+        files take precedence.
+
+  **--log-config-append PATH** **--log-config PATH**
+        The name of logging configuration file. It does not
+        disable existing loggers, but just appends specified
+        logging configuration to any other existing logging
+        options. Please see the Python logging module documentation
+        for details on logging configuration files. The log-config
+        name for this option is depcrecated.
+
+  **--log-format FORMAT**
+        A logging.Formatter log message format string which may use any
+        of the available logging.LogRecord attributes. Default: None
+
+  **--log-date-format DATE_FORMAT**
+        Format string for %(asctime)s in log records. Default: None
+
+  **--log-file PATH, --logfile PATH**
+        (Optional) Name of log file to output to. If not set, logging
+        will go to stdout.
+
+  **--log-dir LOG_DIR, --logdir LOG_DIR**
+        (Optional) The directory to keep log files in (will be prepended
+        to --log-file)

doc/source/man/watcher-api.rst

@@ -0,0 +1,39 @@
+===========
+watcher-api
+===========
+
+---------------------------
+Service for the Watcher API
+---------------------------
+
+:Author: openstack@lists.launchpad.net
+:Date:
+:Copyright: OpenStack Foundation
+:Version:
+:Manual section: 1
+:Manual group: cloud computing
+
+SYNOPSIS
+========
+
+watcher-api [options]
+
+DESCRIPTION
+===========
+
+watcher-api is a server daemon that serves the Watcher API
+
+OPTIONS
+=======
+
+  **General options**
+
+  .. include:: general-options.rst
+
+FILES
+=====
+
+  **/etc/watcher/watcher.conf**
+        Default configuration file for Watcher API
+
+.. include:: footer.rst

doc/source/man/watcher-applier.rst

@@ -0,0 +1,39 @@
+===============
+watcher-applier
+===============
+
+-------------------------------
+Service for the Watcher Applier
+-------------------------------
+
+:Author: openstack@lists.launchpad.net
+:Date:
+:Copyright: OpenStack Foundation
+:Version:
+:Manual section: 1
+:Manual group: cloud computing
+
+SYNOPSIS
+========
+
+watcher-applier [options]
+
+DESCRIPTION
+===========
+
+:ref:`Watcher Applier <watcher_applier_definition>`
+
+OPTIONS
+=======
+
+  **General options**
+
+  .. include:: general-options.rst
+
+FILES
+=====
+
+  **/etc/watcher/watcher.conf**
+        Default configuration file for Watcher Applier
+
+.. include:: footer.rst

doc/source/man/watcher-db-manage.rst

@@ -6,9 +6,9 @@
 
 .. _watcher-db-manage:
 
-=============
+=================
 watcher-db-manage
-=============
+=================
 
 The :command:`watcher-db-manage` utility is used to create the database schema
 tables that the watcher services will use for storage. It can also be used to
@@ -52,7 +52,7 @@ run the following::
 
   Show the program's version number and exit.
 
-.. option:: upgrade, downgrade, stamp, revision, version, create_schema
+.. option:: upgrade, downgrade, stamp, revision, version, create_schema, purge
 
   The :ref:`command <db-manage_cmds>` to run.
 
@@ -219,3 +219,42 @@ version
   Show help for version and exit.
 
 This command will output the current database version.
+
+purge
+-----
+
+.. program:: purge
+
+.. option:: -h, --help
+
+  Show help for purge and exit.
+
+.. option:: -d, --age-in-days
+
+  The number of days (starting from today) before which we consider soft
+  deleted objects as expired and should hence be erased. By default, all
+  objects soft deleted are considered expired. This can be useful as removing
+  a significant amount of objects may cause a performance issues.
+
+.. option:: -n, --max-number
+
+  The maximum number of database objects we expect to be deleted. If exceeded,
+  this will prevent any deletion.
+
+.. option:: -t, --audit-template
+
+  Either the UUID or name of the soft deleted audit template to purge. This
+  will also include any related objects with it.
+
+.. option:: -e, --exclude-orphans
+
+  This is a flag to indicate when we want to exclude orphan objects from
+  deletion.
+
+.. option:: --dry-run
+
+  This is a flag to indicate when we want to perform a dry run. This will show
+  the objects that would be deleted instead of actually deleting them.
+
+This command will purge the current database by removing both its soft deleted
+and orphan objects.

doc/source/man/watcher-decision-engine.rst

@@ -0,0 +1,39 @@
+=======================
+watcher-decision-engine
+=======================
+
+---------------------------------------
+Service for the Watcher Decision Engine
+---------------------------------------
+
+:Author: openstack@lists.launchpad.net
+:Date:
+:Copyright: OpenStack Foundation
+:Version:
+:Manual section: 1
+:Manual group: cloud computing
+
+SYNOPSIS
+========
+
+watcher-decision-engine [options]
+
+DESCRIPTION
+===========
+
+:ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
+
+OPTIONS
+=======
+
+  **General options**
+
+  .. include:: general-options.rst
+
+FILES
+=====
+
+  **/etc/watcher/watcher.conf**
+        Default configuration file for Watcher Decision Engine
+
+.. include:: footer.rst

doc/source/readme.rst

@@ -1 +0,0 @@
-.. include:: ../../README.rst

doc/source/usage.rst

@@ -1,13 +0,0 @@
-..
-      Except where otherwise noted, this document is licensed under Creative
-      Commons Attribution 3.0 License.  You can view the license at:
-
-          https://creativecommons.org/licenses/by/3.0/
-
-========
-Usage
-========
-
-To use watcher in a project::
-
-    import watcher

doc/source/webapi/v1.rst

@@ -4,15 +4,28 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-=====================
+====================
- RESTful Web API (v1)
+RESTful Web API (v1)
-=====================
+====================
+
+Goals
+=====
+
+.. rest-controller:: watcher.api.controllers.v1.goal:GoalsController
+   :webprefix: /v1/goal
+
+.. autotype:: watcher.api.controllers.v1.goal.GoalCollection
+   :members:
+
+.. autotype:: watcher.api.controllers.v1.goal.Goal
+   :members:
+
 
 Audit Templates
 ===============
 
 .. rest-controller:: watcher.api.controllers.v1.audit_template:AuditTemplatesController
-   :webprefix: /v1/audit_template
+   :webprefix: /v1/audit_templates
 
 .. autotype:: watcher.api.controllers.v1.audit_template.AuditTemplateCollection
    :members:
@@ -20,7 +33,6 @@ Audit Templates
 .. autotype:: watcher.api.controllers.v1.audit_template.AuditTemplate
    :members:
 
-
 Audits
 ======
 
@@ -33,24 +45,22 @@ Audits
 .. autotype:: watcher.api.controllers.v1.audit.Audit
    :members:
 
-
 Links
 =====
 
 .. autotype:: watcher.api.controllers.link.Link
    :members:
 
-
+Action Plans
-ActionPlans
+============
-===========
 
 .. rest-controller:: watcher.api.controllers.v1.action_plan:ActionPlansController
    :webprefix: /v1/action_plans
 
-.. autotype:: watcher.api.controllers.v1.action_plan.ActionPlan
+.. autotype:: watcher.api.controllers.v1.action_plan.ActionPlanCollection
    :members:
 
-.. autotype:: watcher.api.controllers.v1.action_plan.ActionPlanCollection
+.. autotype:: watcher.api.controllers.v1.action_plan.ActionPlan
    :members:
 
 

etc/watcher/README-watcher.conf.txt

@@ -0,0 +1,4 @@
+To generate the sample watcher.conf file, run the following
+command from the top level of the watcher directory:
+
+tox -econfig

etc/watcher/watcher-config-generator.conf

@@ -0,0 +1,9 @@
+[DEFAULT]
+output_file = etc/watcher/watcher.conf.sample
+wrap_width = 79
+
+namespace = watcher
+namespace = keystonemiddleware.auth_token
+namespace = oslo.log
+namespace = oslo.db
+namespace = oslo.messaging

etc/watcher/watcher.conf.sample

@@ -1,805 +0,0 @@
-[DEFAULT]
-
-#
-# From oslo.log
-#
-
-# Print debugging output (set logging level to DEBUG instead of
-# default INFO level). (boolean value)
-#debug = false
-
-# If set to false, will disable INFO logging level, making WARNING the
-# default. (boolean value)
-# This option is deprecated for removal.
-# Its value may be silently ignored in the future.
-#verbose = true
-
-# The name of a logging configuration file. This file is appended to
-# any existing logging configuration files. For details about logging
-# configuration files, see the Python logging module documentation.
-# Note that when logging configuration files are used then all logging
-# configuration is set in the configuration file and other logging
-# configuration options are ignored (for example, log_format). (string
-# value)
-# Deprecated group/name - [DEFAULT]/log_config
-#log_config_append = <None>
-
-# DEPRECATED. A logging.Formatter log message format string which may
-# use any of the available logging.LogRecord attributes. This option
-# is deprecated.  Please use logging_context_format_string and
-# logging_default_format_string instead. This option is ignored if
-# log_config_append is set. (string value)
-#log_format = <None>
-
-# Format string for %%(asctime)s in log records. Default: %(default)s
-# . This option is ignored if log_config_append is set. (string value)
-#log_date_format = %Y-%m-%d %H:%M:%S
-
-# (Optional) Name of log file to output to. If no default is set,
-# logging will go to stdout. This option is ignored if
-# log_config_append is set. (string value)
-# Deprecated group/name - [DEFAULT]/logfile
-#log_file = <None>
-
-# (Optional) The base directory used for relative --log-file paths.
-# This option is ignored if log_config_append is set. (string value)
-# Deprecated group/name - [DEFAULT]/logdir
-#log_dir = <None>
-
-# (Optional) Uses logging handler designed to watch file system. When
-# log file is moved or removed this handler will open a new log file
-# with specified path instantaneously. It makes sense only if log-file
-# option is specified and Linux platform is used. This option is
-# ignored if log_config_append is set. (boolean value)
-#watch_log_file = false
-
-# Use syslog for logging. Existing syslog format is DEPRECATED and
-# will be changed later to honor RFC5424. This option is ignored if
-# log_config_append is set. (boolean value)
-#use_syslog = false
-
-# (Optional) Enables or disables syslog rfc5424 format for logging. If
-# enabled, prefixes the MSG part of the syslog message with APP-NAME
-# (RFC5424). The format without the APP-NAME is deprecated in Kilo,
-# and will be removed in Mitaka, along with this option. This option
-# is ignored if log_config_append is set. (boolean value)
-# This option is deprecated for removal.
-# Its value may be silently ignored in the future.
-#use_syslog_rfc_format = true
-
-# Syslog facility to receive log lines. This option is ignored if
-# log_config_append is set. (string value)
-#syslog_log_facility = LOG_USER
-
-# Log output to standard error. This option is ignored if
-# log_config_append is set. (boolean value)
-#use_stderr = true
-
-# Format string to use for log messages with context. (string value)
-#logging_context_format_string = %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [%(request_id)s %(user_identity)s] %(instance)s%(message)s
-
-# Format string to use for log messages without context. (string
-# value)
-#logging_default_format_string = %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [-] %(instance)s%(message)s
-
-# Data to append to log format when level is DEBUG. (string value)
-#logging_debug_format_suffix = %(funcName)s %(pathname)s:%(lineno)d
-
-# Prefix each line of exception output with this format. (string
-# value)
-#logging_exception_prefix = %(asctime)s.%(msecs)03d %(process)d ERROR %(name)s %(instance)s
-
-# List of logger=LEVEL pairs. This option is ignored if
-# log_config_append is set. (list value)
-#default_log_levels = amqp=WARN,amqplib=WARN,boto=WARN,qpid=WARN,sqlalchemy=WARN,suds=INFO,oslo.messaging=INFO,iso8601=WARN,requests.packages.urllib3.connectionpool=WARN,urllib3.connectionpool=WARN,websocket=WARN,requests.packages.urllib3.util.retry=WARN,urllib3.util.retry=WARN,keystonemiddleware=WARN,routes.middleware=WARN,stevedore=WARN,taskflow=WARN
-
-# Enables or disables publication of error events. (boolean value)
-#publish_errors = false
-
-# The format for an instance that is passed with the log message.
-# (string value)
-#instance_format = "[instance: %(uuid)s] "
-
-# The format for an instance UUID that is passed with the log message.
-# (string value)
-#instance_uuid_format = "[instance: %(uuid)s] "
-
-# Format string for user_identity field of the
-# logging_context_format_string (string value)
-#logging_user_identity_format = %(user)s %(tenant)s %(domain)s %(user_domain)s %(project_domain)s
-
-# Enables or disables fatal status of deprecations. (boolean value)
-#fatal_deprecations = false
-
-#
-# From oslo.messaging
-#
-
-# Size of RPC connection pool. (integer value)
-# Deprecated group/name - [DEFAULT]/rpc_conn_pool_size
-#rpc_conn_pool_size = 30
-
-# ZeroMQ bind address. Should be a wildcard (*), an ethernet
-# interface, or IP. The "host" option should point or resolve to this
-# address. (string value)
-#rpc_zmq_bind_address = *
-
-# MatchMaker driver. (string value)
-#rpc_zmq_matchmaker = redis
-
-# Use REQ/REP pattern for all methods CALL/CAST/FANOUT. (boolean
-# value)
-#rpc_zmq_all_req_rep = true
-
-# Type of concurrency used. Either "native" or "eventlet" (string
-# value)
-#rpc_zmq_concurrency = eventlet
-
-# Number of ZeroMQ contexts, defaults to 1. (integer value)
-#rpc_zmq_contexts = 1
-
-# Maximum number of ingress messages to locally buffer per topic.
-# Default is unlimited. (integer value)
-#rpc_zmq_topic_backlog = <None>
-
-# Directory for holding IPC sockets. (string value)
-#rpc_zmq_ipc_dir = /var/run/openstack
-
-# Name of this node. Must be a valid hostname, FQDN, or IP address.
-# Must match "host" option, if running Nova. (string value)
-#rpc_zmq_host = localhost
-
-# Seconds to wait before a cast expires (TTL). Only supported by
-# impl_zmq. (integer value)
-#rpc_cast_timeout = 30
-
-# The default number of seconds that poll should wait. Poll raises
-# timeout exception when timeout expired. (integer value)
-#rpc_poll_timeout = 1
-
-# Configures zmq-messaging to use broker or not. (boolean value)
-#zmq_use_broker = false
-
-# Minimal port number for random ports range. (port value)
-# Minimum value: 1
-# Maximum value: 65535
-#rpc_zmq_min_port = 49152
-
-# Maximal port number for random ports range. (integer value)
-# Minimum value: 1
-# Maximum value: 65536
-#rpc_zmq_max_port = 65536
-
-# Number of retries to find free port number before fail with
-# ZMQBindError. (integer value)
-#rpc_zmq_bind_port_retries = 100
-
-# Host to locate redis. (string value)
-#host = 127.0.0.1
-
-# Use this port to connect to redis host. (port value)
-# Minimum value: 1
-# Maximum value: 65535
-#port = 6379
-
-# Password for Redis server (optional). (string value)
-#password =
-
-# Size of executor thread pool. (integer value)
-# Deprecated group/name - [DEFAULT]/rpc_thread_pool_size
-#executor_thread_pool_size = 64
-
-# The Drivers(s) to handle sending notifications. Possible values are
-# messaging, messagingv2, routing, log, test, noop (multi valued)
-# Deprecated group/name - [DEFAULT]/notification_driver
-#driver =
-
-# A URL representing the messaging driver to use for notifications. If
-# not set, we fall back to the same configuration used for RPC.
-# (string value)
-# Deprecated group/name - [DEFAULT]/notification_transport_url
-#transport_url = <None>
-
-# AMQP topic used for OpenStack notifications. (list value)
-# Deprecated group/name - [rpc_notifier2]/topics
-# Deprecated group/name - [DEFAULT]/notification_topics
-#topics = notifications
-
-# Seconds to wait for a response from a call. (integer value)
-#rpc_response_timeout = 60
-
-# A URL representing the messaging driver to use and its full
-# configuration. If not set, we fall back to the rpc_backend option
-# and driver specific configuration. (string value)
-#transport_url = <None>
-
-# The messaging driver to use, defaults to rabbit. Other drivers
-# include amqp and zmq. (string value)
-#rpc_backend = rabbit
-
-# The default exchange under which topics are scoped. May be
-# overridden by an exchange name specified in the transport_url
-# option. (string value)
-#control_exchange = openstack
-
-
-[api]
-
-#
-# From watcher
-#
-
-# The port for the watcher API server (integer value)
-#port = 9322
-
-# The listen IP for the watcher API server (string value)
-#host = 0.0.0.0
-
-# The maximum number of items returned in a single response from a
-# collection resource. (integer value)
-#max_limit = 1000
-
-
-[database]
-
-#
-# From oslo.db
-#
-
-# The file name to use with SQLite. (string value)
-# Deprecated group/name - [DEFAULT]/sqlite_db
-#sqlite_db = oslo.sqlite
-
-# If True, SQLite uses synchronous mode. (boolean value)
-# Deprecated group/name - [DEFAULT]/sqlite_synchronous
-#sqlite_synchronous = true
-
-# The back end to use for the database. (string value)
-# Deprecated group/name - [DEFAULT]/db_backend
-#backend = sqlalchemy
-
-# The SQLAlchemy connection string to use to connect to the database.
-# (string value)
-# Deprecated group/name - [DEFAULT]/sql_connection
-# Deprecated group/name - [DATABASE]/sql_connection
-# Deprecated group/name - [sql]/connection
-#connection = <None>
-
-# The SQLAlchemy connection string to use to connect to the slave
-# database. (string value)
-#slave_connection = <None>
-
-# The SQL mode to be used for MySQL sessions. This option, including
-# the default, overrides any server-set SQL mode. To use whatever SQL
-# mode is set by the server configuration, set this to no value.
-# Example: mysql_sql_mode= (string value)
-#mysql_sql_mode = TRADITIONAL
-
-# Timeout before idle SQL connections are reaped. (integer value)
-# Deprecated group/name - [DEFAULT]/sql_idle_timeout
-# Deprecated group/name - [DATABASE]/sql_idle_timeout
-# Deprecated group/name - [sql]/idle_timeout
-#idle_timeout = 3600
-
-# Minimum number of SQL connections to keep open in a pool. (integer
-# value)
-# Deprecated group/name - [DEFAULT]/sql_min_pool_size
-# Deprecated group/name - [DATABASE]/sql_min_pool_size
-#min_pool_size = 1
-
-# Maximum number of SQL connections to keep open in a pool. (integer
-# value)
-# Deprecated group/name - [DEFAULT]/sql_max_pool_size
-# Deprecated group/name - [DATABASE]/sql_max_pool_size
-#max_pool_size = <None>
-
-# Maximum number of database connection retries during startup. Set to
-# -1 to specify an infinite retry count. (integer value)
-# Deprecated group/name - [DEFAULT]/sql_max_retries
-# Deprecated group/name - [DATABASE]/sql_max_retries
-#max_retries = 10
-
-# Interval between retries of opening a SQL connection. (integer
-# value)
-# Deprecated group/name - [DEFAULT]/sql_retry_interval
-# Deprecated group/name - [DATABASE]/reconnect_interval
-#retry_interval = 10
-
-# If set, use this value for max_overflow with SQLAlchemy. (integer
-# value)
-# Deprecated group/name - [DEFAULT]/sql_max_overflow
-# Deprecated group/name - [DATABASE]/sqlalchemy_max_overflow
-#max_overflow = <None>
-
-# Verbosity of SQL debugging information: 0=None, 100=Everything.
-# (integer value)
-# Deprecated group/name - [DEFAULT]/sql_connection_debug
-#connection_debug = 0
-
-# Add Python stack traces to SQL as comment strings. (boolean value)
-# Deprecated group/name - [DEFAULT]/sql_connection_trace
-#connection_trace = false
-
-# If set, use this value for pool_timeout with SQLAlchemy. (integer
-# value)
-# Deprecated group/name - [DATABASE]/sqlalchemy_pool_timeout
-#pool_timeout = <None>
-
-# Enable the experimental use of database reconnect on connection
-# lost. (boolean value)
-#use_db_reconnect = false
-
-# Seconds between retries of a database transaction. (integer value)
-#db_retry_interval = 1
-
-# If True, increases the interval between retries of a database
-# operation up to db_max_retry_interval. (boolean value)
-#db_inc_retry_interval = true
-
-# If db_inc_retry_interval is set, the maximum seconds between retries
-# of a database operation. (integer value)
-#db_max_retry_interval = 10
-
-# Maximum retries in case of connection error or deadlock error before
-# error is raised. Set to -1 to specify an infinite retry count.
-# (integer value)
-#db_max_retries = 20
-
-
-[keystone_authtoken]
-
-#
-# From keystonemiddleware.auth_token
-#
-
-# Complete public Identity API endpoint. (string value)
-#auth_uri = <None>
-
-# API version of the admin Identity API endpoint. (string value)
-#auth_version = <None>
-
-# Do not handle authorization requests within the middleware, but
-# delegate the authorization decision to downstream WSGI components.
-# (boolean value)
-#delay_auth_decision = false
-
-# Request timeout value for communicating with Identity API server.
-# (integer value)
-#http_connect_timeout = <None>
-
-# How many times are we trying to reconnect when communicating with
-# Identity API Server. (integer value)
-#http_request_max_retries = 3
-
-# Env key for the swift cache. (string value)
-#cache = <None>
-
-# Required if identity server requires client certificate (string
-# value)
-#certfile = <None>
-
-# Required if identity server requires client certificate (string
-# value)
-#keyfile = <None>
-
-# A PEM encoded Certificate Authority to use when verifying HTTPs
-# connections. Defaults to system CAs. (string value)
-#cafile = <None>
-
-# Verify HTTPS connections. (boolean value)
-#insecure = false
-
-# The region in which the identity server can be found. (string value)
-#region_name = <None>
-
-# Directory used to cache files related to PKI tokens. (string value)
-#signing_dir = <None>
-
-# Optionally specify a list of memcached server(s) to use for caching.
-# If left undefined, tokens will instead be cached in-process. (list
-# value)
-# Deprecated group/name - [DEFAULT]/memcache_servers
-#memcached_servers = <None>
-
-# In order to prevent excessive effort spent validating tokens, the
-# middleware caches previously-seen tokens for a configurable duration
-# (in seconds). Set to -1 to disable caching completely. (integer
-# value)
-#token_cache_time = 300
-
-# Determines the frequency at which the list of revoked tokens is
-# retrieved from the Identity service (in seconds). A high number of
-# revocation events combined with a low cache duration may
-# significantly reduce performance. (integer value)
-#revocation_cache_time = 10
-
-# (Optional) If defined, indicate whether token data should be
-# authenticated or authenticated and encrypted. Acceptable values are
-# MAC or ENCRYPT.  If MAC, token data is authenticated (with HMAC) in
-# the cache. If ENCRYPT, token data is encrypted and authenticated in
-# the cache. If the value is not one of these options or empty,
-# auth_token will raise an exception on initialization. (string value)
-#memcache_security_strategy = <None>
-
-# (Optional, mandatory if memcache_security_strategy is defined) This
-# string is used for key derivation. (string value)
-#memcache_secret_key = <None>
-
-# (Optional) Number of seconds memcached server is considered dead
-# before it is tried again. (integer value)
-#memcache_pool_dead_retry = 300
-
-# (Optional) Maximum total number of open connections to every
-# memcached server. (integer value)
-#memcache_pool_maxsize = 10
-
-# (Optional) Socket timeout in seconds for communicating with a
-# memcached server. (integer value)
-#memcache_pool_socket_timeout = 3
-
-# (Optional) Number of seconds a connection to memcached is held
-# unused in the pool before it is closed. (integer value)
-#memcache_pool_unused_timeout = 60
-
-# (Optional) Number of seconds that an operation will wait to get a
-# memcached client connection from the pool. (integer value)
-#memcache_pool_conn_get_timeout = 10
-
-# (Optional) Use the advanced (eventlet safe) memcached client pool.
-# The advanced pool will only work under python 2.x. (boolean value)
-#memcache_use_advanced_pool = false
-
-# (Optional) Indicate whether to set the X-Service-Catalog header. If
-# False, middleware will not ask for service catalog on token
-# validation and will not set the X-Service-Catalog header. (boolean
-# value)
-#include_service_catalog = true
-
-# Used to control the use and type of token binding. Can be set to:
-# "disabled" to not check token binding. "permissive" (default) to
-# validate binding information if the bind type is of a form known to
-# the server and ignore it if not. "strict" like "permissive" but if
-# the bind type is unknown the token will be rejected. "required" any
-# form of token binding is needed to be allowed. Finally the name of a
-# binding method that must be present in tokens. (string value)
-#enforce_token_bind = permissive
-
-# If true, the revocation list will be checked for cached tokens. This
-# requires that PKI tokens are configured on the identity server.
-# (boolean value)
-#check_revocations_for_cached = false
-
-# Hash algorithms to use for hashing PKI tokens. This may be a single
-# algorithm or multiple. The algorithms are those supported by Python
-# standard hashlib.new(). The hashes will be tried in the order given,
-# so put the preferred one first for performance. The result of the
-# first hash will be stored in the cache. This will typically be set
-# to multiple values only while migrating from a less secure algorithm
-# to a more secure one. Once all the old tokens are expired this
-# option should be set to a single value for better performance. (list
-# value)
-#hash_algorithms = md5
-
-# Prefix to prepend at the beginning of the path. Deprecated, use
-# identity_uri. (string value)
-#auth_admin_prefix =
-
-# Host providing the admin Identity API endpoint. Deprecated, use
-# identity_uri. (string value)
-#auth_host = 127.0.0.1
-
-# Port of the admin Identity API endpoint. Deprecated, use
-# identity_uri. (integer value)
-#auth_port = 35357
-
-# Protocol of the admin Identity API endpoint (http or https).
-# Deprecated, use identity_uri. (string value)
-#auth_protocol = https
-
-# Complete admin Identity API endpoint. This should specify the
-# unversioned root endpoint e.g. https://localhost:35357/ (string
-# value)
-#identity_uri = <None>
-
-# This option is deprecated and may be removed in a future release.
-# Single shared secret with the Keystone configuration used for
-# bootstrapping a Keystone installation, or otherwise bypassing the
-# normal authentication process. This option should not be used, use
-# `admin_user` and `admin_password` instead. (string value)
-#admin_token = <None>
-
-# Service username. (string value)
-#admin_user = <None>
-
-# Service user password. (string value)
-#admin_password = <None>
-
-# Service tenant name. (string value)
-#admin_tenant_name = admin
-
-# Authentication type to load (unknown value)
-# Deprecated group/name - [DEFAULT]/auth_plugin
-#auth_type = <None>
-
-# Config Section from which to load plugin specific options (unknown
-# value)
-#auth_section = <None>
-
-
-[matchmaker_redis]
-
-#
-# From oslo.messaging
-#
-
-# Host to locate redis. (string value)
-#host = 127.0.0.1
-
-# Use this port to connect to redis host. (port value)
-# Minimum value: 1
-# Maximum value: 65535
-#port = 6379
-
-# Password for Redis server (optional). (string value)
-#password =
-
-
-[oslo_messaging_amqp]
-
-#
-# From oslo.messaging
-#
-
-# address prefix used when sending to a specific server (string value)
-# Deprecated group/name - [amqp1]/server_request_prefix
-#server_request_prefix = exclusive
-
-# address prefix used when broadcasting to all servers (string value)
-# Deprecated group/name - [amqp1]/broadcast_prefix
-#broadcast_prefix = broadcast
-
-# address prefix when sending to any server in group (string value)
-# Deprecated group/name - [amqp1]/group_request_prefix
-#group_request_prefix = unicast
-
-# Name for the AMQP container (string value)
-# Deprecated group/name - [amqp1]/container_name
-#container_name = <None>
-
-# Timeout for inactive connections (in seconds) (integer value)
-# Deprecated group/name - [amqp1]/idle_timeout
-#idle_timeout = 0
-
-# Debug: dump AMQP frames to stdout (boolean value)
-# Deprecated group/name - [amqp1]/trace
-#trace = false
-
-# CA certificate PEM file to verify server certificate (string value)
-# Deprecated group/name - [amqp1]/ssl_ca_file
-#ssl_ca_file =
-
-# Identifying certificate PEM file to present to clients (string
-# value)
-# Deprecated group/name - [amqp1]/ssl_cert_file
-#ssl_cert_file =
-
-# Private key PEM file used to sign cert_file certificate (string
-# value)
-# Deprecated group/name - [amqp1]/ssl_key_file
-#ssl_key_file =
-
-# Password for decrypting ssl_key_file (if encrypted) (string value)
-# Deprecated group/name - [amqp1]/ssl_key_password
-#ssl_key_password = <None>
-
-# Accept clients using either SSL or plain TCP (boolean value)
-# Deprecated group/name - [amqp1]/allow_insecure_clients
-#allow_insecure_clients = false
-
-# Space separated list of acceptable SASL mechanisms (string value)
-# Deprecated group/name - [amqp1]/sasl_mechanisms
-#sasl_mechanisms =
-
-# Path to directory that contains the SASL configuration (string
-# value)
-# Deprecated group/name - [amqp1]/sasl_config_dir
-#sasl_config_dir =
-
-# Name of configuration file (without .conf suffix) (string value)
-# Deprecated group/name - [amqp1]/sasl_config_name
-#sasl_config_name =
-
-# User name for message broker authentication (string value)
-# Deprecated group/name - [amqp1]/username
-#username =
-
-# Password for message broker authentication (string value)
-# Deprecated group/name - [amqp1]/password
-#password =
-
-
-[oslo_messaging_rabbit]
-
-#
-# From oslo.messaging
-#
-
-# Use durable queues in AMQP. (boolean value)
-# Deprecated group/name - [DEFAULT]/amqp_durable_queues
-# Deprecated group/name - [DEFAULT]/rabbit_durable_queues
-#amqp_durable_queues = false
-
-# Auto-delete queues in AMQP. (boolean value)
-# Deprecated group/name - [DEFAULT]/amqp_auto_delete
-#amqp_auto_delete = false
-
-# Send a single AMQP reply to call message. The current behaviour
-# since oslo-incubator is to send two AMQP replies - first one with
-# the payload, a second one to ensure the other have finish to send
-# the payload. We are going to remove it in the N release, but we must
-# keep backward compatible at the same time. This option provides such
-# compatibility - it defaults to False in Liberty and can be turned on
-# for early adopters with a new installations or for testing. Please
-# note, that this option will be removed in the Mitaka release.
-# (boolean value)
-#send_single_reply = false
-
-# SSL version to use (valid only if SSL enabled). Valid values are
-# TLSv1 and SSLv23. SSLv2, SSLv3, TLSv1_1, and TLSv1_2 may be
-# available on some distributions. (string value)
-# Deprecated group/name - [DEFAULT]/kombu_ssl_version
-#kombu_ssl_version =
-
-# SSL key file (valid only if SSL enabled). (string value)
-# Deprecated group/name - [DEFAULT]/kombu_ssl_keyfile
-#kombu_ssl_keyfile =
-
-# SSL cert file (valid only if SSL enabled). (string value)
-# Deprecated group/name - [DEFAULT]/kombu_ssl_certfile
-#kombu_ssl_certfile =
-
-# SSL certification authority file (valid only if SSL enabled).
-# (string value)
-# Deprecated group/name - [DEFAULT]/kombu_ssl_ca_certs
-#kombu_ssl_ca_certs =
-
-# How long to wait before reconnecting in response to an AMQP consumer
-# cancel notification. (floating point value)
-# Deprecated group/name - [DEFAULT]/kombu_reconnect_delay
-#kombu_reconnect_delay = 1.0
-
-# How long to wait a missing client beforce abandoning to send it its
-# replies. This value should not be longer than rpc_response_timeout.
-# (integer value)
-# Deprecated group/name - [DEFAULT]/kombu_reconnect_timeout
-#kombu_missing_consumer_retry_timeout = 5
-
-# Determines how the next RabbitMQ node is chosen in case the one we
-# are currently connected to becomes unavailable. Takes effect only if
-# more than one RabbitMQ node is provided in config. (string value)
-# Allowed values: round-robin, shuffle
-#kombu_failover_strategy = round-robin
-
-# The RabbitMQ broker address where a single node is used. (string
-# value)
-# Deprecated group/name - [DEFAULT]/rabbit_host
-#rabbit_host = localhost
-
-# The RabbitMQ broker port where a single node is used. (port value)
-# Minimum value: 1
-# Maximum value: 65535
-# Deprecated group/name - [DEFAULT]/rabbit_port
-#rabbit_port = 5672
-
-# RabbitMQ HA cluster host:port pairs. (list value)
-# Deprecated group/name - [DEFAULT]/rabbit_hosts
-#rabbit_hosts = $rabbit_host:$rabbit_port
-
-# Connect over SSL for RabbitMQ. (boolean value)
-# Deprecated group/name - [DEFAULT]/rabbit_use_ssl
-#rabbit_use_ssl = false
-
-# The RabbitMQ userid. (string value)
-# Deprecated group/name - [DEFAULT]/rabbit_userid
-#rabbit_userid = guest
-
-# The RabbitMQ password. (string value)
-# Deprecated group/name - [DEFAULT]/rabbit_password
-#rabbit_password = guest
-
-# The RabbitMQ login method. (string value)
-# Deprecated group/name - [DEFAULT]/rabbit_login_method
-#rabbit_login_method = AMQPLAIN
-
-# The RabbitMQ virtual host. (string value)
-# Deprecated group/name - [DEFAULT]/rabbit_virtual_host
-#rabbit_virtual_host = /
-
-# How frequently to retry connecting with RabbitMQ. (integer value)
-#rabbit_retry_interval = 1
-
-# How long to backoff for between retries when connecting to RabbitMQ.
-# (integer value)
-# Deprecated group/name - [DEFAULT]/rabbit_retry_backoff
-#rabbit_retry_backoff = 2
-
-# Maximum number of RabbitMQ connection retries. Default is 0
-# (infinite retry count). (integer value)
-# Deprecated group/name - [DEFAULT]/rabbit_max_retries
-#rabbit_max_retries = 0
-
-# Use HA queues in RabbitMQ (x-ha-policy: all). If you change this
-# option, you must wipe the RabbitMQ database. (boolean value)
-# Deprecated group/name - [DEFAULT]/rabbit_ha_queues
-#rabbit_ha_queues = false
-
-# Number of seconds after which the Rabbit broker is considered down
-# if heartbeat's keep-alive fails (0 disable the heartbeat).
-# EXPERIMENTAL (integer value)
-#heartbeat_timeout_threshold = 60
-
-# How often times during the heartbeat_timeout_threshold we check the
-# heartbeat. (integer value)
-#heartbeat_rate = 2
-
-# Deprecated, use rpc_backend=kombu+memory or rpc_backend=fake
-# (boolean value)
-# Deprecated group/name - [DEFAULT]/fake_rabbit
-#fake_rabbit = false
-
-
-[watcher_applier]
-
-#
-# From watcher
-#
-
-# The number of worker (integer value)
-#applier_worker = 1
-
-# The topic name used forcontrol events, this topic used for rpc call
-# (string value)
-#topic_control = watcher.applier.control
-
-# The topic name used for status events, this topic is used so as to
-# notifythe others components of the system (string value)
-#topic_status = watcher.applier.status
-
-# The identifier used by watcher module on the message broker (string
-# value)
-#publisher_id = watcher.applier.api
-
-
-[watcher_decision_engine]
-
-#
-# From watcher
-#
-
-# The topic name used forcontrol events, this topic used for rpc call
-# (string value)
-#topic_control = watcher.decision.control
-
-# The topic name used for status events, this topic is used so as to
-# notifythe others components of the system (string value)
-#topic_status = watcher.decision.status
-
-# The identifier used by watcher module on the message broker (string
-# value)
-#publisher_id = watcher.decision.api
-
-# The maximum number of threads that can be used to execute strategies
-# (integer value)
-#max_workers = 2
-
-
-[watcher_goals]
-
-#
-# From watcher
-#
-
-# Goals used for the optimization. Maps each goal to an associated
-# strategy (for example: BASIC_CONSOLIDATION:basic,
-# MY_GOAL:my_strategy_1) (dict value)
-#goals = DUMMY:dummy

requirements.txt

@@ -2,28 +2,34 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-enum34;python_version=='2.7' or python_version=='2.6'
+enum34;python_version=='2.7' or python_version=='2.6' or python_version=='3.3' # BSD
-jsonpatch>=1.1
+jsonpatch>=1.1 # BSD
-keystonemiddleware>=2.0.0,!=2.4.0
+keystoneauth1>=2.1.0 # Apache-2.0
-oslo.config>=2.3.0  # Apache-2.0
+keystonemiddleware!=4.1.0,>=4.0.0 # Apache-2.0
-oslo.db>=2.4.1      # Apache-2.0
+oslo.config>=3.7.0 # Apache-2.0
-oslo.i18n>=1.5.0    # Apache-2.0
+oslo.context>=0.2.0 # Apache-2.0
-oslo.log>=1.8.0     # Apache-2.0
+oslo.db>=4.1.0 # Apache-2.0
-oslo.messaging>=1.16.0,!=1.17.0,!=1.17.1,!=2.6.0,!=2.6.1 # Apache-2.0
+oslo.i18n>=2.1.0 # Apache-2.0
+oslo.log>=1.14.0 # Apache-2.0
+oslo.messaging>=4.0.0 # Apache-2.0
 oslo.policy>=0.5.0 # Apache-2.0
-oslo.service>=0.7.0 # Apache-2.0
+oslo.service>=1.0.0 # Apache-2.0
-oslo.utils>=2.0.0,!=2.6.0  # Apache-2.0
+oslo.utils>=3.5.0 # Apache-2.0
-PasteDeploy>=1.5.0
+PasteDeploy>=1.5.0 # MIT
-pbr>=1.6
+pbr>=1.6 # Apache-2.0
-pecan>=1.0.0
+pecan>=1.0.0 # BSD
-python-ceilometerclient>=1.5.0
+PrettyTable<0.8,>=0.7 # BSD
-python-cinderclient>=1.3.1
+voluptuous>=0.8.6 # BSD License
-python-glanceclient>=0.18.0
+python-ceilometerclient>=2.2.1 # Apache-2.0
-python-keystoneclient>=1.6.0,!=1.8.0
+python-cinderclient>=1.3.1 # Apache-2.0
-python-neutronclient>=2.6.0
+python-glanceclient>=2.0.0 # Apache-2.0
-python-novaclient>=2.28.1,!=2.33.0
+python-keystoneclient!=1.8.0,!=2.1.0,>=1.6.0 # Apache-2.0
-python-openstackclient>=1.5.0
+python-neutronclient!=4.1.0,>=2.6.0 # Apache-2.0
-six>=1.9.0
+python-novaclient!=2.33.0,>=2.29.0 # Apache-2.0
-SQLAlchemy>=0.9.9,<1.1.0
+python-openstackclient>=2.1.0 # Apache-2.0
+six>=1.9.0 # MIT
+SQLAlchemy<1.1.0,>=1.0.10 # MIT
 stevedore>=1.5.0 # Apache-2.0
-WSME>=0.7
+taskflow>=1.26.0 # Apache-2.0
+WebOb>=1.2.3 # MIT
+WSME>=0.8 # MIT

setup.cfg

@@ -21,6 +21,7 @@ classifier =
 [files]
 packages =
     watcher
+    watcher_tempest_plugin
 data_files =
     etc/ = etc/*
 
@@ -38,6 +39,9 @@ console_scripts =
     watcher-decision-engine = watcher.cmd.decisionengine:main
     watcher-applier = watcher.cmd.applier:main
 
+tempest.test_plugins =
+    watcher_tests = watcher_tempest_plugin.plugin:WatcherTempestPlugin
+
 watcher.database.migration_backend =
     sqlalchemy = watcher.db.sqlalchemy.migration
 
@@ -45,6 +49,30 @@ watcher_strategies =
     dummy = watcher.decision_engine.strategy.strategies.dummy_strategy:DummyStrategy
     basic = watcher.decision_engine.strategy.strategies.basic_consolidation:BasicConsolidation
     outlet_temp_control = watcher.decision_engine.strategy.strategies.outlet_temp_control:OutletTempControl
+    vm_workload_consolidation = watcher.decision_engine.strategy.strategies.vm_workload_consolidation:VMWorkloadConsolidation
+
+watcher_actions =
+    migrate = watcher.applier.actions.migration:Migrate
+    nop = watcher.applier.actions.nop:Nop
+    sleep = watcher.applier.actions.sleep:Sleep
+    change_nova_service_state = watcher.applier.actions.change_nova_service_state:ChangeNovaServiceState
+
+watcher_workflow_engines =
+    taskflow = watcher.applier.workflow_engine.default:DefaultWorkFlowEngine
+
+watcher_planners =
+    default  = watcher.decision_engine.planner.default:DefaultPlanner
+
+[pbr]
+warnerrors = true
+autodoc_index_modules = true
+autodoc_exclude_modules =
+    watcher.db.sqlalchemy.alembic.env
+    watcher.db.sqlalchemy.alembic.versions.*
+    watcher.tests.*
+    watcher_tempest_plugin.*
+    watcher.doc
+
 
 [build_sphinx]
 source-dir = doc/source
@@ -66,6 +94,6 @@ output_dir = watcher/locale
 input_file = watcher/locale/watcher.pot
 
 [extract_messages]
-keywords = _ gettext ngettext l_ lazy_gettext
+keywords = _ gettext ngettext l_ lazy_gettext _LI _LW _LE _LC
 mapping_file = babel.cfg
 output_file = watcher/locale/watcher.pot

setup.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -26,5 +25,5 @@ except ImportError:
     pass
 
 setuptools.setup(
-    setup_requires=['pbr'],
+    setup_requires=['pbr>=1.8'],
     pbr=True)

test-requirements.txt

@@ -2,20 +2,20 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-coverage>=3.6
+coverage>=3.6 # Apache-2.0
-discover
+discover # BSD
-hacking>=0.10.2,<0.11
+doc8 # Apache-2.0
-mock>=1.2
+freezegun # Apache-2.0
+hacking<0.11,>=0.10.2
+mock>=1.2 # BSD
 oslotest>=1.10.0 # Apache-2.0
-python-subunit>=0.0.18
+os-testr>=0.4.1 # Apache-2.0
-testrepository>=0.0.18
+python-subunit>=0.0.18 # Apache-2.0/BSD
-testscenarios>=0.4
+testrepository>=0.0.18 # Apache-2.0/BSD
-testtools>=1.4.0
+testscenarios>=0.4 # Apache-2.0/BSD
+testtools>=1.4.0 # MIT
 
 # Doc requirements
-oslosphinx>=2.5.0 # Apache-2.0
+oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
-sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
+sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2 # BSD
-sphinxcontrib-pecanwsme>=0.8
+sphinxcontrib-pecanwsme>=0.8 # Apache-2.0
-
-# For PyPI distribution
-twine

tox.ini

@@ -14,48 +14,47 @@ deps = -r{toxinidir}/requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
   find . -type d -name "__pycache__" -delete
-  python setup.py testr --slowest --testr-args='{posargs}'
+  ostestr --concurrency=6 {posargs}
 
 [testenv:pep8]
-commands = flake8
+commands =
+    doc8 doc/source/ CONTRIBUTING.rst HACKING.rst README.rst
+    flake8
 
 [testenv:venv]
+setenv = PYTHONHASHSEED=0
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py testr --coverage --omit="watcher/tests/*" --testr-args='{posargs}'
+commands = python setup.py testr --coverage --testr-args='{posargs}'
 
 [testenv:docs]
-commands = python setup.py build_sphinx
+setenv = PYTHONHASHSEED=0
+commands =
+    doc8 doc/source/ CONTRIBUTING.rst HACKING.rst README.rst
+    python setup.py build_sphinx
 
 [testenv:debug]
-commands = oslo_debug_helper {posargs}
+commands = oslo_debug_helper -t watcher/tests {posargs}
 
 [testenv:config]
 sitepackages = False
 commands =
-  oslo-config-generator --namespace watcher \
+    oslo-config-generator --config-file etc/watcher/watcher-config-generator.conf
-                        --namespace keystonemiddleware.auth_token \
-                        --namespace oslo.log \
-                        --namespace oslo.db \
-                        --namespace oslo.messaging \
-                        --output-file etc/watcher/watcher.conf.sample
 
 [flake8]
-# E123, E125 skipped as they are invalid PEP-8.
-
 show-source=True
-ignore=E123,E125
+ignore=
 builtins= _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build,*sqlalchemy/alembic/versions/*,demo/
 
-[testenv:pypi]
-commands =
-    python setup.py sdist bdist_wheel
-    twine upload --config-file .pypirc {posargs} dist/*
-
 [testenv:wheel]
 commands = python setup.py bdist_wheel
 
 [hacking]
 import_exceptions = watcher._i18n
+
+[doc8]
+extension=.rst
+# todo: stop ignoring doc/source/man when https://bugs.launchpad.net/doc8/+bug/1502391 is fixed
+ignore-path=doc/source/image_src,doc/source/man,doc/source/api

watcher/api/controllers/v1/action.py

@@ -15,6 +15,46 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+An :ref:`Action <action_definition>` is what enables Watcher to transform the
+current state of a :ref:`Cluster <cluster_definition>` after an
+:ref:`Audit <audit_definition>`.
+
+An :ref:`Action <action_definition>` is an atomic task which changes the
+current state of a target :ref:`Managed resource <managed_resource_definition>`
+of the OpenStack :ref:`Cluster <cluster_definition>` such as:
+
+-  Live migration of an instance from one compute node to another compute
+   node with Nova
+-  Changing the power level of a compute node (ACPI level, ...)
+-  Changing the current state of an hypervisor (enable or disable) with Nova
+
+In most cases, an :ref:`Action <action_definition>` triggers some concrete
+commands on an existing OpenStack module (Nova, Neutron, Cinder, Ironic, etc.).
+
+An :ref:`Action <action_definition>` has a life-cycle and its current state may
+be one of the following:
+
+-  **PENDING** : the :ref:`Action <action_definition>` has not been executed
+   yet by the :ref:`Watcher Applier <watcher_applier_definition>`
+-  **ONGOING** : the :ref:`Action <action_definition>` is currently being
+   processed by the :ref:`Watcher Applier <watcher_applier_definition>`
+-  **SUCCEEDED** : the :ref:`Action <action_definition>` has been executed
+   successfully
+-  **FAILED** : an error occured while trying to execute the
+   :ref:`Action <action_definition>`
+-  **DELETED** : the :ref:`Action <action_definition>` is still stored in the
+   :ref:`Watcher database <watcher_database_definition>` but is not returned
+   any more through the Watcher APIs.
+-  **CANCELLED** : the :ref:`Action <action_definition>` was in **PENDING** or
+   **ONGOING** state and was cancelled by the
+   :ref:`Administrator <administrator_definition>`
+
+:ref:`Some default implementations are provided <watcher_planners>`, but it is
+possible to :ref:`develop new implementations <implement_action_plugin>` which
+are dynamically loaded by Watcher at launch time.
+"""
+
 import datetime
 
 import pecan
@@ -87,29 +127,17 @@ class Action(base.APIBase):
                                        mandatory=True)
     """The action plan this action belongs to """
 
-    description = wtypes.text
-    """Description of this action"""
-
     state = wtypes.text
     """This audit state"""
 
     alarm = types.uuid
     """An alarm UUID related to this action"""
 
-    applies_to = wtypes.text
-    """Applies to"""
-
-    src = wtypes.text
-    """Hypervisor source"""
-
-    dst = wtypes.text
-    """Hypervisor source"""
-
     action_type = wtypes.text
     """Action type"""
 
-    parameter = wtypes.text
+    input_parameters = types.jsontype
-    """Additionnal parameter"""
+    """One or more key/value pairs """
 
     next_uuid = wsme.wsproperty(types.uuid, _get_next_uuid,
                                 _set_next_uuid,
@@ -230,7 +258,7 @@ class ActionsController(rest.RestController):
                                 resource_url=None,
                                 action_plan_uuid=None, audit_uuid=None):
         limit = api_utils.validate_limit(limit)
-        sort_dir = api_utils.validate_sort_dir(sort_dir)
+        api_utils.validate_sort_dir(sort_dir)
 
         marker_obj = None
         if marker:
@@ -261,10 +289,10 @@ class ActionsController(rest.RestController):
                                                    sort_key=sort_key,
                                                    sort_dir=sort_dir)
 
-    @wsme_pecan.wsexpose(ActionCollection, types.uuid, types.uuid,
+    @wsme_pecan.wsexpose(ActionCollection, types.uuid, int,
-                         int, wtypes.text, wtypes.text, types.uuid,
+                         wtypes.text, wtypes.text, types.uuid,
                          types.uuid)
-    def get_all(self, action_uuid=None, marker=None, limit=None,
+    def get_all(self, marker=None, limit=None,
                 sort_key='id', sort_dir='asc', action_plan_uuid=None,
                 audit_uuid=None):
         """Retrieve a list of actions.
@@ -285,16 +313,14 @@ class ActionsController(rest.RestController):
             marker, limit, sort_key, sort_dir,
             action_plan_uuid=action_plan_uuid, audit_uuid=audit_uuid)
 
-    @wsme_pecan.wsexpose(ActionCollection, types.uuid,
+    @wsme_pecan.wsexpose(ActionCollection, types.uuid, int,
-                         types.uuid, int, wtypes.text, wtypes.text,
+                         wtypes.text, wtypes.text, types.uuid,
-                         types.uuid, types.uuid)
+                         types.uuid)
-    def detail(self, action_uuid=None, marker=None, limit=None,
+    def detail(self, marker=None, limit=None,
                sort_key='id', sort_dir='asc', action_plan_uuid=None,
                audit_uuid=None):
         """Retrieve a list of actions with detail.
 
-        :param action_uuid: UUID of a action, to get only actions for that
-                            action.
         :param marker: pagination marker for large data sets.
         :param limit: maximum number of resources to return in a single result.
         :param sort_key: column to sort results by. Default: id.
@@ -337,6 +363,10 @@ class ActionsController(rest.RestController):
 
         :param action: a action within the request body.
         """
+        # FIXME: blueprint edit-action-plan-flow
+        raise exception.OperationNotPermitted(
+            _("Cannot create an action directly"))
+
         if self.from_actions:
             raise exception.OperationNotPermitted
 
@@ -357,6 +387,10 @@ class ActionsController(rest.RestController):
         :param action_uuid: UUID of a action.
         :param patch: a json PATCH document to apply to this action.
         """
+        # FIXME: blueprint edit-action-plan-flow
+        raise exception.OperationNotPermitted(
+            _("Cannot modify an action directly"))
+
         if self.from_actions:
             raise exception.OperationNotPermitted
 
@@ -389,6 +423,9 @@ class ActionsController(rest.RestController):
 
         :param action_uuid: UUID of a action.
         """
+        # FIXME: blueprint edit-action-plan-flow
+        raise exception.OperationNotPermitted(
+            _("Cannot delete an action directly"))
 
         action_to_delete = objects.Action.get_by_uuid(
             pecan.request.context,

watcher/api/controllers/v1/action_plan.py

@@ -15,6 +15,45 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+An :ref:`Action Plan <action_plan_definition>` is a flow of
+:ref:`Actions <action_definition>` that should be executed in order to satisfy
+a given :ref:`Goal <goal_definition>`.
+
+An :ref:`Action Plan <action_plan_definition>` is generated by Watcher when an
+:ref:`Audit <audit_definition>` is successful which implies that the
+:ref:`Strategy <strategy_definition>`
+which was used has found a :ref:`Solution <solution_definition>` to achieve the
+:ref:`Goal <goal_definition>` of this :ref:`Audit <audit_definition>`.
+
+In the default implementation of Watcher, an
+:ref:`Action Plan <action_plan_definition>`
+is only composed of successive :ref:`Actions <action_definition>`
+(i.e., a Workflow of :ref:`Actions <action_definition>` belonging to a unique
+branch).
+
+However, Watcher provides abstract interfaces for many of its components,
+allowing other implementations to generate and handle more complex
+:ref:`Action Plan(s) <action_plan_definition>`
+composed of two types of Action Item(s):
+
+-  simple :ref:`Actions <action_definition>`: atomic tasks, which means it
+   can not be split into smaller tasks or commands from an OpenStack point of
+   view.
+-  composite Actions: which are composed of several simple
+   :ref:`Actions <action_definition>`
+   ordered in sequential and/or parallel flows.
+
+An :ref:`Action Plan <action_plan_definition>` may be described using
+standard workflow model description formats such as
+`Business Process Model and Notation 2.0 (BPMN 2.0) <http://www.omg.org/spec/BPMN/2.0/>`_
+or `Unified Modeling Language (UML) <http://www.uml.org/>`_.
+
+To see the life-cycle and description of 
+:ref:`Action Plan <action_plan_definition>` states, visit :ref:`the Action Plan state
+machine <action_plan_state_machine>`.
+"""  # noqa
+
 import datetime
 
 import pecan
@@ -23,21 +62,45 @@ import wsme
 from wsme import types as wtypes
 import wsmeext.pecan as wsme_pecan
 
+from watcher._i18n import _
 from watcher.api.controllers import base
 from watcher.api.controllers import link
 from watcher.api.controllers.v1 import collection
 from watcher.api.controllers.v1 import types
 from watcher.api.controllers.v1 import utils as api_utils
-from watcher.applier.rpcapi import ApplierAPI
+from watcher.applier import rpcapi
 from watcher.common import exception
 from watcher import objects
+from watcher.objects import action_plan as ap_objects
 
 
 class ActionPlanPatchType(types.JsonPatchType):
 
+    @staticmethod
+    def _validate_state(patch):
+        serialized_patch = {'path': patch.path, 'op': patch.op}
+        if patch.value is not wsme.Unset:
+            serialized_patch['value'] = patch.value
+        # todo: use state machines to handle state transitions
+        state_value = patch.value
+        if state_value and not hasattr(ap_objects.State, state_value):
+            msg = _("Invalid state: %(state)s")
+            raise exception.PatchError(
+                patch=serialized_patch, reason=msg % dict(state=state_value))
+
+    @staticmethod
+    def validate(patch):
+        if patch.path == "/state":
+            ActionPlanPatchType._validate_state(patch)
+        return types.JsonPatchType.validate(patch)
+
+    @staticmethod
+    def internal_attrs():
+        return types.JsonPatchType.internal_attrs()
+
     @staticmethod
     def mandatory_attrs():
-        return []
+        return ["audit_id", "state", "first_action_id"]
 
 
 class ActionPlan(base.APIBase):
@@ -103,7 +166,6 @@ class ActionPlan(base.APIBase):
 
         self.fields = []
         fields = list(objects.ActionPlan.fields)
-        fields.append('audit_uuid')
         for field in fields:
             # Skip fields we do not expose.
             if not hasattr(self, field):
@@ -111,14 +173,19 @@ class ActionPlan(base.APIBase):
             self.fields.append(field)
             setattr(self, field, kwargs.get(field, wtypes.Unset))
 
-        self.fields.append('audit_id')
+        self.fields.append('audit_uuid')
+        self.fields.append('first_action_uuid')
+
         setattr(self, 'audit_uuid', kwargs.get('audit_id', wtypes.Unset))
+        setattr(self, 'first_action_uuid',
+                kwargs.get('first_action_id', wtypes.Unset))
 
     @staticmethod
     def _convert_with_links(action_plan, url, expand=True):
         if not expand:
-            action_plan.unset_fields_except(['uuid', 'state', 'updated_at',
+            action_plan.unset_fields_except(
-                                             'audit_uuid'])
+                ['uuid', 'state', 'updated_at',
+                 'audit_uuid', 'first_action_uuid'])
 
         action_plan.links = [link.Link.make_link(
             'self', url,
@@ -201,7 +268,7 @@ class ActionPlansController(rest.RestController):
                                      resource_url=None, audit_uuid=None):
 
         limit = api_utils.validate_limit(limit)
-        sort_dir = api_utils.validate_sort_dir(sort_dir)
+        api_utils.validate_sort_dir(sort_dir)
 
         marker_obj = None
         if marker:
@@ -230,9 +297,9 @@ class ActionPlansController(rest.RestController):
             sort_key=sort_key,
             sort_dir=sort_dir)
 
-    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, types.uuid,
+    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, int, wtypes.text,
-                         int, wtypes.text, wtypes.text, types.uuid)
+                         wtypes.text, types.uuid)
-    def get_all(self, action_plan_uuid=None, marker=None, limit=None,
+    def get_all(self, marker=None, limit=None,
                 sort_key='id', sort_dir='asc', audit_uuid=None):
         """Retrieve a list of action plans.
 
@@ -246,14 +313,12 @@ class ActionPlansController(rest.RestController):
         return self._get_action_plans_collection(
             marker, limit, sort_key, sort_dir, audit_uuid=audit_uuid)
 
-    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, types.uuid,
+    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, int, wtypes.text,
-                         int, wtypes.text, wtypes.text, types.uuid)
+                         wtypes.text, types.uuid)
-    def detail(self, action_plan_uuid=None, marker=None, limit=None,
+    def detail(self, marker=None, limit=None,
                sort_key='id', sort_dir='asc', audit_uuid=None):
         """Retrieve a list of action_plans with detail.
 
-        :param action_plan_uuid: UUID of a action plan, to get only
-        :action_plans for that action.
         :param marker: pagination marker for large data sets.
         :param limit: maximum number of resources to return in a single result.
         :param sort_key: column to sort results by. Default: id.
@@ -302,10 +367,10 @@ class ActionPlansController(rest.RestController):
     @wsme_pecan.wsexpose(ActionPlan, types.uuid,
                          body=[ActionPlanPatchType])
     def patch(self, action_plan_uuid, patch):
-        """Update an existing audit template.
+        """Update an existing action plan.
 
-        :param audit template_uuid: UUID of a audit template.
+        :param action_plan_uuid: UUID of a action plan.
-        :param patch: a json PATCH document to apply to this audit template.
+        :param patch: a json PATCH document to apply to this action plan.
         """
         launch_action_plan = True
         if self.from_actionsPlans:
@@ -322,6 +387,34 @@ class ActionPlansController(rest.RestController):
             raise exception.PatchError(patch=patch, reason=e)
 
         launch_action_plan = False
+
+        # transitions that are allowed via PATCH
+        allowed_patch_transitions = [
+            (ap_objects.State.RECOMMENDED,
+             ap_objects.State.PENDING),
+            (ap_objects.State.RECOMMENDED,
+             ap_objects.State.CANCELLED),
+            (ap_objects.State.ONGOING,
+             ap_objects.State.CANCELLED),
+            (ap_objects.State.PENDING,
+             ap_objects.State.CANCELLED),
+        ]
+
+        # todo: improve this in blueprint watcher-api-validation
+        if hasattr(action_plan, 'state'):
+            transition = (action_plan_to_update.state, action_plan.state)
+            if transition not in allowed_patch_transitions:
+                error_message = _("State transition not allowed: "
+                                  "(%(initial_state)s -> %(new_state)s)")
+                raise exception.PatchError(
+                    patch=patch,
+                    reason=error_message % dict(
+                        initial_state=action_plan_to_update.state,
+                        new_state=action_plan.state))
+
+            if action_plan.state == ap_objects.State.PENDING:
+                launch_action_plan = True
+
         # Update only the fields that have changed
         for field in objects.ActionPlan.fields:
             try:
@@ -334,13 +427,14 @@ class ActionPlansController(rest.RestController):
             if action_plan_to_update[field] != patch_val:
                 action_plan_to_update[field] = patch_val
 
-            if field == 'state' and patch_val == 'STARTING':
+            if (field == 'state'
+                    and patch_val == objects.action_plan.State.PENDING):
                 launch_action_plan = True
 
         action_plan_to_update.save()
 
         if launch_action_plan:
-            applier_client = ApplierAPI()
+            applier_client = rpcapi.ApplierAPI()
             applier_client.launch_action_plan(pecan.request.context,
                                               action_plan.uuid)
 

watcher/api/controllers/v1/audit.py

@@ -15,6 +15,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+In the Watcher system, an :ref:`Audit <audit_definition>` is a request for
+optimizing a :ref:`Cluster <cluster_definition>`.
+
+The optimization is done in order to satisfy one :ref:`Goal <goal_definition>`
+on a given :ref:`Cluster <cluster_definition>`.
+
+For each :ref:`Audit <audit_definition>`, the Watcher system generates an
+:ref:`Action Plan <action_plan_definition>`.
+
+To see the life-cycle and description of an :ref:`Audit <audit_definition>`
+states, visit :ref:`the Audit State machine <audit_state_machine>`.
+"""
+
 import datetime
 
 import pecan
@@ -23,6 +37,7 @@ import wsme
 from wsme import types as wtypes
 import wsmeext.pecan as wsme_pecan
 
+from watcher._i18n import _
 from watcher.api.controllers import base
 from watcher.api.controllers import link
 from watcher.api.controllers.v1 import collection
@@ -30,7 +45,7 @@ from watcher.api.controllers.v1 import types
 from watcher.api.controllers.v1 import utils as api_utils
 from watcher.common import exception
 from watcher.common import utils
-from watcher.decision_engine.rpcapi import DecisionEngineAPI
+from watcher.decision_engine import rpcapi
 from watcher import objects
 
 
@@ -181,6 +196,7 @@ class AuditCollection(collection.Collection):
     """A list containing audits objects"""
 
     def __init__(self, **kwargs):
+        super(AuditCollection, self).__init__()
         self._type = 'audits'
 
     @staticmethod
@@ -227,7 +243,7 @@ class AuditsController(rest.RestController):
                                sort_key, sort_dir, expand=False,
                                resource_url=None, audit_template=None):
         limit = api_utils.validate_limit(limit)
-        sort_dir = api_utils.validate_sort_dir(sort_dir)
+        api_utils.validate_sort_dir(sort_dir)
 
         marker_obj = None
         if marker:
@@ -257,10 +273,9 @@ class AuditsController(rest.RestController):
                                                   sort_key=sort_key,
                                                   sort_dir=sort_dir)
 
-    @wsme_pecan.wsexpose(AuditCollection, types.uuid,
+    @wsme_pecan.wsexpose(AuditCollection, types.uuid, int, wtypes.text,
-                         types.uuid, int, wtypes.text,
                          wtypes.text, wtypes.text)
-    def get_all(self, audit_uuid=None, marker=None, limit=None,
+    def get_all(self, marker=None, limit=None,
                 sort_key='id', sort_dir='asc', audit_template=None):
         """Retrieve a list of audits.
 
@@ -275,13 +290,12 @@ class AuditsController(rest.RestController):
                                            sort_dir,
                                            audit_template=audit_template)
 
-    @wsme_pecan.wsexpose(AuditCollection, types.uuid,
+    @wsme_pecan.wsexpose(AuditCollection, types.uuid, int, wtypes.text,
-                         types.uuid, int, wtypes.text, wtypes.text)
+                         wtypes.text)
-    def detail(self, audit_uuid=None, marker=None, limit=None,
+    def detail(self, marker=None, limit=None,
                sort_key='id', sort_dir='asc'):
         """Retrieve a list of audits with detail.
 
-        :param audit_uuid: UUID of a audit, to get only audits for that audit.
         :param marker: pagination marker for large data sets.
         :param limit: maximum number of resources to return in a single result.
         :param sort_key: column to sort results by. Default: id.
@@ -320,6 +334,11 @@ class AuditsController(rest.RestController):
         if self.from_audits:
             raise exception.OperationNotPermitted
 
+        if not audit._audit_template_uuid:
+            raise exception.Invalid(
+                message=_('The audit template UUID or name specified is '
+                          'invalid'))
+
         audit_dict = audit.as_dict()
         context = pecan.request.context
         new_audit = objects.Audit(context, **audit_dict)
@@ -330,7 +349,7 @@ class AuditsController(rest.RestController):
 
         # trigger decision-engine to run the audit
 
-        dc_client = DecisionEngineAPI()
+        dc_client = rpcapi.DecisionEngineAPI()
         dc_client.trigger_audit(context, new_audit.uuid)
 
         return Audit.convert_with_links(new_audit)

watcher/api/controllers/v1/audit_template.py

@@ -15,8 +15,42 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+An :ref:`Audit <audit_definition>` may be launched several times with the same
+settings (:ref:`Goal <goal_definition>`, thresholds, ...). Therefore it makes
+sense to save those settings in some sort of Audit preset object, which is
+known as an :ref:`Audit Template <audit_template_definition>`.
+
+An :ref:`Audit Template <audit_template_definition>` contains at least the
+:ref:`Goal <goal_definition>` of the :ref:`Audit <audit_definition>`.
+
+It may also contain some error handling settings indicating whether:
+
+-  :ref:`Watcher Applier <watcher_applier_definition>` stops the
+   entire operation
+-  :ref:`Watcher Applier <watcher_applier_definition>` performs a rollback
+
+and how many retries should be attempted before failure occurs (also the latter
+can be complex: for example the scenario in which there are many first-time
+failures on ultimately successful :ref:`Actions <action_definition>`).
+
+Moreover, an :ref:`Audit Template <audit_template_definition>` may contain some
+settings related to the level of automation for the
+:ref:`Action Plan <action_plan_definition>` that will be generated by the
+:ref:`Audit <audit_definition>`.
+A flag will indicate whether the :ref:`Action Plan <action_plan_definition>`
+will be launched automatically or will need a manual confirmation from the
+:ref:`Administrator <administrator_definition>`.
+
+Last but not least, an :ref:`Audit Template <audit_template_definition>` may
+contain a list of extra parameters related to the
+:ref:`Strategy <strategy_definition>` configuration. These parameters can be
+provided as a list of key-value pairs.
+"""
+
 import datetime
 
+from oslo_config import cfg
 import pecan
 from pecan import rest
 import wsme
@@ -34,11 +68,25 @@ from watcher import objects
 
 
 class AuditTemplatePatchType(types.JsonPatchType):
-
     @staticmethod
     def mandatory_attrs():
         return []
 
+    @staticmethod
+    def validate(patch):
+        if patch.path == "/goal":
+            AuditTemplatePatchType._validate_goal(patch)
+        return types.JsonPatchType.validate(patch)
+
+    @staticmethod
+    def _validate_goal(patch):
+        serialized_patch = {'path': patch.path, 'op': patch.op}
+        if patch.value is not wsme.Unset:
+            serialized_patch['value'] = patch.value
+        new_goal = patch.value
+        if new_goal and new_goal not in cfg.CONF.watcher_goals.goals.keys():
+            raise exception.InvalidGoal(goal=new_goal)
+
 
 class AuditTemplate(base.APIBase):
     """API representation of a audit template.
@@ -116,13 +164,19 @@ class AuditTemplate(base.APIBase):
                      name='My Audit Template',
                      description='Description of my audit template',
                      host_aggregate=5,
-                     goal='SERVERS_CONSOLIDATION',
+                     goal='DUMMY',
                      extra={'automatic': True},
                      created_at=datetime.datetime.utcnow(),
                      deleted_at=None,
                      updated_at=datetime.datetime.utcnow())
         return cls._convert_with_links(sample, 'http://localhost:9322', expand)
 
+    @staticmethod
+    def validate(audit_template):
+        if audit_template.goal not in cfg.CONF.watcher_goals.goals.keys():
+            raise exception.InvalidGoal(audit_template.goal)
+        return audit_template
+
 
 class AuditTemplateCollection(collection.Collection):
     """API representation of a collection of audit templates."""
@@ -131,6 +185,7 @@ class AuditTemplateCollection(collection.Collection):
     """A list containing audit templates objects"""
 
     def __init__(self, **kwargs):
+        super(AuditTemplateCollection, self).__init__()
         self._type = 'audit_templates'
 
     @staticmethod
@@ -163,12 +218,13 @@ class AuditTemplatesController(rest.RestController):
         'detail': ['GET'],
     }
 
-    def _get_audit_templates_collection(self, marker, limit,
+    def _get_audit_templates_collection(self, filters, marker, limit,
                                         sort_key, sort_dir, expand=False,
                                         resource_url=None):
-
+        api_utils.validate_search_filters(
+            filters, objects.audit_template.AuditTemplate.fields.keys())
         limit = api_utils.validate_limit(limit)
-        sort_dir = api_utils.validate_sort_dir(sort_dir)
+        api_utils.validate_sort_dir(sort_dir)
 
         marker_obj = None
         if marker:
@@ -178,6 +234,7 @@ class AuditTemplatesController(rest.RestController):
 
         audit_templates = objects.AuditTemplate.list(
             pecan.request.context,
+            filters,
             limit,
             marker_obj, sort_key=sort_key,
             sort_dir=sort_dir)
@@ -189,26 +246,30 @@ class AuditTemplatesController(rest.RestController):
                                                           sort_key=sort_key,
                                                           sort_dir=sort_dir)
 
-    @wsme_pecan.wsexpose(AuditTemplateCollection, types.uuid, int,
+    @wsme_pecan.wsexpose(AuditTemplateCollection, wtypes.text,
-                         wtypes.text, wtypes.text)
+                         types.uuid, int, wtypes.text, wtypes.text)
-    def get_all(self, marker=None, limit=None,
+    def get_all(self, goal=None, marker=None, limit=None,
                 sort_key='id', sort_dir='asc'):
         """Retrieve a list of audit templates.
 
+        :param goal: goal name to filter by (case sensitive)
         :param marker: pagination marker for large data sets.
         :param limit: maximum number of resources to return in a single result.
         :param sort_key: column to sort results by. Default: id.
         :param sort_dir: direction to sort. "asc" or "desc". Default: asc.
         """
-        return self._get_audit_templates_collection(marker, limit, sort_key,
+        filters = api_utils.as_filters_dict(goal=goal)
-                                                    sort_dir)
 
-    @wsme_pecan.wsexpose(AuditTemplateCollection, types.uuid, int,
+        return self._get_audit_templates_collection(
+            filters, marker, limit, sort_key, sort_dir)
+
+    @wsme_pecan.wsexpose(AuditTemplateCollection, wtypes.text, types.uuid, int,
                          wtypes.text, wtypes.text)
-    def detail(self, marker=None, limit=None,
+    def detail(self, goal=None, marker=None, limit=None,
                sort_key='id', sort_dir='asc'):
         """Retrieve a list of audit templates with detail.
 
+        :param goal: goal name to filter by (case sensitive)
         :param marker: pagination marker for large data sets.
         :param limit: maximum number of resources to return in a single result.
         :param sort_key: column to sort results by. Default: id.
@@ -219,9 +280,11 @@ class AuditTemplatesController(rest.RestController):
         if parent != "audit_templates":
             raise exception.HTTPNotFound
 
+        filters = api_utils.as_filters_dict(goal=goal)
+
         expand = True
         resource_url = '/'.join(['audit_templates', 'detail'])
-        return self._get_audit_templates_collection(marker, limit,
+        return self._get_audit_templates_collection(filters, marker, limit,
                                                     sort_key, sort_dir, expand,
                                                     resource_url)
 
@@ -229,7 +292,7 @@ class AuditTemplatesController(rest.RestController):
     def get_one(self, audit_template):
         """Retrieve information about the given audit template.
 
-        :param audit template_uuid: UUID or name of an audit template.
+        :param audit audit_template: UUID or name of an audit template.
         """
         if self.from_audit_templates:
             raise exception.OperationNotPermitted
@@ -245,12 +308,14 @@ class AuditTemplatesController(rest.RestController):
 
         return AuditTemplate.convert_with_links(rpc_audit_template)
 
+    @wsme.validate(types.uuid, AuditTemplate)
     @wsme_pecan.wsexpose(AuditTemplate, body=AuditTemplate, status_code=201)
     def post(self, audit_template):
         """Create a new audit template.
 
         :param audit template: a audit template within the request body.
         """
+
         if self.from_audit_templates:
             raise exception.OperationNotPermitted
 

watcher/api/controllers/v1/goal.py

@@ -15,6 +15,23 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+A :ref:`Goal <goal_definition>` is a human readable, observable and measurable
+end result having one objective to be achieved.
+
+Here are some examples of :ref:`Goals <goal_definition>`:
+
+-  minimize the energy consumption
+-  minimize the number of compute nodes (consolidation)
+-  balance the workload among compute nodes
+-  minimize the license cost (some softwares have a licensing model which is
+   based on the number of sockets or cores where the software is deployed)
+-  find the most appropriate moment for a planned maintenance on a
+   given group of host (which may be an entire availability zone):
+   power supply replacement, cooling system replacement, hardware
+   modification, ...
+"""
+
 from oslo_config import cfg
 
 import pecan
@@ -94,6 +111,7 @@ class GoalCollection(collection.Collection):
     """A list containing goals objects"""
 
     def __init__(self, **kwargs):
+        super(GoalCollection, self).__init__()
         self._type = 'goals'
 
     @staticmethod
@@ -141,7 +159,7 @@ class GoalsController(rest.RestController):
                               resource_url=None, goal_name=None):
 
         limit = api_utils.validate_limit(limit)
-        sort_dir = api_utils.validate_sort_dir(sort_dir)
+        api_utils.validate_sort_dir(sort_dir)
 
         goals = []
 

watcher/api/controllers/v1/utils.py

@@ -47,7 +47,15 @@ def validate_sort_dir(sort_dir):
         raise wsme.exc.ClientSideError(_("Invalid sort direction: %s. "
                                          "Acceptable values are "
                                          "'asc' or 'desc'") % sort_dir)
-    return sort_dir
+
+
+def validate_search_filters(filters, allowed_fields):
+    # Very leightweight validation for now
+    # todo: improve this (e.g. https://www.parse.com/docs/rest/guide/#queries)
+    for filter_name in filters.keys():
+        if filter_name not in allowed_fields:
+            raise wsme.exc.ClientSideError(
+                _("Invalid filter: %s") % filter_name)
 
 
 def apply_jsonpatch(doc, patch):
@@ -58,3 +66,12 @@ def apply_jsonpatch(doc, patch):
                         ' the resource is not allowed')
                 raise wsme.exc.ClientSideError(msg % p['path'])
     return jsonpatch.apply_patch(doc, jsonpatch.JsonPatch(patch))
+
+
+def as_filters_dict(**filters):
+    filters_dict = {}
+    for filter_name, filter_value in filters.items():
+        if filter_value:
+            filters_dict[filter_name] = filter_value
+
+    return filters_dict

watcher/api/middleware/parsable_error.py

@@ -69,8 +69,7 @@ class ParsableErrorMiddleware(object):
         if (state['status_code'] // 100) not in (2, 3):
             req = webob.Request(environ)
             if (req.accept.best_match(['application/json', 'application/xml']
-                                      ) == 'application/xml'
+                                      ) == 'application/xml'):
-                ):
                 try:
                     # simple check xml is valid
                     body = [et.ElementTree.tostring(

watcher/applier/action_plan/default.py

@@ -18,51 +18,50 @@
 #
 from oslo_log import log
 
-from watcher.applier.action_plan.base import BaseActionPlanHandler
+from watcher.applier.action_plan import base
-from watcher.applier.default import DefaultApplier
+from watcher.applier import default
-from watcher.applier.messaging.events import Events
+from watcher.applier.messaging import event_types
-from watcher.common.messaging.events.event import Event
+from watcher.common.messaging.events import event
-from watcher.objects.action_plan import ActionPlan
+from watcher.objects import action_plan as ap_objects
-from watcher.objects.action_plan import Status
 
 LOG = log.getLogger(__name__)
 
 
-class DefaultActionPlanHandler(BaseActionPlanHandler):
+class DefaultActionPlanHandler(base.BaseActionPlanHandler):
-    def __init__(self, context, manager_applier, action_plan_uuid):
+    def __init__(self, context, applier_manager, action_plan_uuid):
         super(DefaultActionPlanHandler, self).__init__()
         self.ctx = context
         self.action_plan_uuid = action_plan_uuid
-        self.manager_applier = manager_applier
+        self.applier_manager = applier_manager
 
     def notify(self, uuid, event_type, state):
-        action_plan = ActionPlan.get_by_uuid(self.ctx, uuid)
+        action_plan = ap_objects.ActionPlan.get_by_uuid(self.ctx, uuid)
         action_plan.state = state
         action_plan.save()
-        event = Event()
+        ev = event.Event()
-        event.type = event_type
+        ev.type = event_type
-        event.data = {}
+        ev.data = {}
         payload = {'action_plan__uuid': uuid,
                    'action_plan_state': state}
-        self.manager_applier.topic_status.publish_event(event.type.name,
+        self.applier_manager.status_topic_handler.publish_event(
-                                                        payload)
+            ev.type.name, payload)
 
     def execute(self):
         try:
             # update state
             self.notify(self.action_plan_uuid,
-                        Events.LAUNCH_ACTION_PLAN,
+                        event_types.EventTypes.LAUNCH_ACTION_PLAN,
-                        Status.ONGOING)
+                        ap_objects.State.ONGOING)
-            applier = DefaultApplier(self.manager_applier, self.ctx)
+            applier = default.DefaultApplier(self.ctx, self.applier_manager)
-            result = applier.execute(self.action_plan_uuid)
+            applier.execute(self.action_plan_uuid)
+            state = ap_objects.State.SUCCEEDED
+
         except Exception as e:
-            result = False
+            LOG.exception(e)
-            LOG.error("Launch Action Plan " + unicode(e))
+            state = ap_objects.State.FAILED
+
         finally:
-            if result is True:
-                status = Status.SUCCEEDED
-            else:
-                status = Status.FAILED
             # update state
-            self.notify(self.action_plan_uuid, Events.LAUNCH_ACTION_PLAN,
+            self.notify(self.action_plan_uuid,
-                        status)
+                        event_types.EventTypes.LAUNCH_ACTION_PLAN,
+                        state)

watcher/applier/actions/base.py

@@ -0,0 +1,116 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+
+import abc
+
+import six
+
+from watcher.common import clients
+
+
+@six.add_metaclass(abc.ABCMeta)
+class BaseAction(object):
+    # NOTE(jed) by convention we decided
+    # that the attribute "resource_id" is the unique id of
+    # the resource to which the Action applies to allow us to use it in the
+    # watcher dashboard and will be nested in input_parameters
+    RESOURCE_ID = 'resource_id'
+
+    def __init__(self, osc=None):
+        """:param osc: an OpenStackClients instance"""
+        self._input_parameters = {}
+        self._osc = osc
+
+    @property
+    def osc(self):
+        if not self._osc:
+            self._osc = clients.OpenStackClients()
+        return self._osc
+
+    @property
+    def input_parameters(self):
+        return self._input_parameters
+
+    @input_parameters.setter
+    def input_parameters(self, p):
+        self._input_parameters = p
+
+    @property
+    def resource_id(self):
+        return self.input_parameters[self.RESOURCE_ID]
+
+    @abc.abstractmethod
+    def execute(self):
+        """Executes the main logic of the action
+
+        This method can be used to perform an action on a given set of input
+        parameters to accomplish some type of operation. This operation may
+        return a boolean value as a result of its execution. If False, this
+        will be considered as an error and will then trigger the reverting of
+        the actions.
+
+        :returns: A flag indicating whether or not the action succeeded
+        :rtype: bool
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def revert(self):
+        """Revert this action
+
+        This method should rollback the resource to its initial state in the
+        event of a faulty execution. This happens when the action raised an
+        exception during its :py:meth:`~.BaseAction.execute`.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def precondition(self):
+        """Hook: called before the execution of an action
+
+        This method can be used to perform some initializations or to make
+        some more advanced validation on its input parameters. So if you wish
+        to block its execution based on this factor, `raise` the related
+        exception.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def postcondition(self):
+        """Hook: called after the execution of an action
+
+        This function is called regardless of whether an action succeded or
+        not. So you can use it to perform cleanup operations.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def schema(self):
+        """Defines a Schema that the input parameters shall comply to
+
+        :returns: A schema declaring the input parameters this action should be
+                  provided along with their respective constraints
+        :rtype: :py:class:`voluptuous.Schema` instance
+        """
+        raise NotImplementedError()
+
+    def validate_parameters(self):
+        self.schema(self.input_parameters)
+        return True

watcher/applier/actions/change_nova_service_state.py

@@ -0,0 +1,102 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import six
+import voluptuous
+
+from watcher._i18n import _
+from watcher.applier.actions import base
+from watcher.common import exception
+from watcher.common import nova_helper
+from watcher.decision_engine.model import hypervisor_state as hstate
+
+
+class ChangeNovaServiceState(base.BaseAction):
+    """Disables or enables the nova-compute service, deployed on a host
+
+    By using this action, you will be able to update the state of a
+    nova-compute service. A disabled nova-compute service can not be selected
+    by the nova scheduler for future deployment of server.
+
+    The action schema is::
+
+        schema = Schema({
+         'resource_id': str,
+         'state': str,
+        })
+
+    The `resource_id` references a nova-compute service name (list of available
+    nova-compute services is returned by this command: ``nova service-list
+    --binary nova-compute``).
+    The `state` value should either be `ONLINE` or `OFFLINE`.
+    """
+
+    STATE = 'state'
+
+    @property
+    def schema(self):
+        return voluptuous.Schema({
+            voluptuous.Required(self.RESOURCE_ID):
+                voluptuous.All(
+                    voluptuous.Any(*six.string_types),
+                    voluptuous.Length(min=1)),
+            voluptuous.Required(self.STATE):
+                voluptuous.Any(*[state.value
+                                 for state in list(hstate.HypervisorState)]),
+        })
+
+    @property
+    def host(self):
+        return self.resource_id
+
+    @property
+    def state(self):
+        return self.input_parameters.get(self.STATE)
+
+    def execute(self):
+        target_state = None
+        if self.state == hstate.HypervisorState.DISABLED.value:
+            target_state = False
+        elif self.state == hstate.HypervisorState.ENABLED.value:
+            target_state = True
+        return self._nova_manage_service(target_state)
+
+    def revert(self):
+        target_state = None
+        if self.state == hstate.HypervisorState.DISABLED.value:
+            target_state = True
+        elif self.state == hstate.HypervisorState.ENABLED.value:
+            target_state = False
+        return self._nova_manage_service(target_state)
+
+    def _nova_manage_service(self, state):
+        if state is None:
+            raise exception.IllegalArgumentException(
+                message=_("The target state is not defined"))
+
+        nova = nova_helper.NovaHelper(osc=self.osc)
+        if state is True:
+            return nova.enable_service_nova_compute(self.host)
+        else:
+            return nova.disable_service_nova_compute(self.host)
+
+    def precondition(self):
+        pass
+
+    def postcondition(self):
+        pass

watcher/applier/actions/factory.py

@@ -0,0 +1,42 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2016 b<>com
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import unicode_literals
+
+from oslo_log import log
+
+from watcher.applier.actions.loading import default
+
+LOG = log.getLogger(__name__)
+
+
+class ActionFactory(object):
+    def __init__(self):
+        self.action_loader = default.DefaultActionLoader()
+
+    def make_action(self, object_action, osc=None):
+        LOG.debug("Creating instance of %s", object_action.action_type)
+        loaded_action = self.action_loader.load(name=object_action.action_type,
+                                                osc=osc)
+        loaded_action.input_parameters = object_action.input_parameters
+        LOG.debug("Checking the input parameters")
+        # NOTE(jed) if we change the schema of an action and we try to reload
+        # an older version of the Action, the validation can fail.
+        # We need to add the versioning of an Action or a migration tool.
+        # We can also create an new Action which extends the previous one.
+        loaded_action.validate_parameters()
+        return loaded_action

watcher/applier/actions/loading/default.py

@@ -1,8 +1,6 @@
 # -*- encoding: utf-8 -*-
 # Copyright (c) 2015 b<>com
 #
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -17,10 +15,15 @@
 # limitations under the License.
 #
 
+from __future__ import unicode_literals
 
-from watcher.decision_engine.actions.base import BaseAction
+from oslo_log import log
+
+from watcher.common.loader import default
+
+LOG = log.getLogger(__name__)
 
 
-class Nop(BaseAction):
+class DefaultActionLoader(default.DefaultLoader):
-    def __str__(self):
+    def __init__(self):
-        return "Nop"
+        super(DefaultActionLoader, self).__init__(namespace='watcher_actions')

watcher/applier/actions/migration.py

@@ -0,0 +1,159 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from oslo_log import log
+import six
+import voluptuous
+
+from watcher._i18n import _, _LC
+from watcher.applier.actions import base
+from watcher.common import exception
+from watcher.common import nova_helper
+from watcher.common import utils
+
+LOG = log.getLogger(__name__)
+
+
+class Migrate(base.BaseAction):
+    """Live-Migrates a server to a destination nova-compute host
+
+    This action will allow you to migrate a server to another compute
+    destination host. As of now, only live migration can be performed using
+    this action.
+    .. If either host uses shared storage, you can use ``live``
+    .. as ``migration_type``. If both source and destination hosts provide
+    .. local disks, you can set the block_migration parameter to True (not
+    .. supported for yet).
+
+    The action schema is::
+
+        schema = Schema({
+         'resource_id': str,  # should be a UUID
+         'migration_type': str,  # choices -> "live" only
+         'dst_hypervisor': str,
+         'src_hypervisor': str,
+        })
+
+    The `resource_id` is the UUID of the server to migrate. Only live migration
+    is supported.
+    The `src_hypervisor` and `dst_hypervisor` parameters are respectively the
+    source and the destination compute hostname (list of available compute
+    hosts is returned by this command: ``nova service-list --binary
+    nova-compute``).
+    """
+
+    # input parameters constants
+    MIGRATION_TYPE = 'migration_type'
+    LIVE_MIGRATION = 'live'
+    DST_HYPERVISOR = 'dst_hypervisor'
+    SRC_HYPERVISOR = 'src_hypervisor'
+
+    def check_resource_id(self, value):
+        if (value is not None and
+                len(value) > 0 and not
+                utils.is_uuid_like(value)):
+            raise voluptuous.Invalid(_("The parameter"
+                                       " resource_id is invalid."))
+
+    @property
+    def schema(self):
+        return voluptuous.Schema({
+            voluptuous.Required(self.RESOURCE_ID): self.check_resource_id,
+            voluptuous.Required(self.MIGRATION_TYPE,
+                                default=self.LIVE_MIGRATION):
+                                    voluptuous.Any(*[self.LIVE_MIGRATION]),
+            voluptuous.Required(self.DST_HYPERVISOR):
+                voluptuous.All(voluptuous.Any(*six.string_types),
+                               voluptuous.Length(min=1)),
+            voluptuous.Required(self.SRC_HYPERVISOR):
+                voluptuous.All(voluptuous.Any(*six.string_types),
+                               voluptuous.Length(min=1)),
+        })
+
+    @property
+    def instance_uuid(self):
+        return self.resource_id
+
+    @property
+    def migration_type(self):
+        return self.input_parameters.get(self.MIGRATION_TYPE)
+
+    @property
+    def dst_hypervisor(self):
+        return self.input_parameters.get(self.DST_HYPERVISOR)
+
+    @property
+    def src_hypervisor(self):
+        return self.input_parameters.get(self.SRC_HYPERVISOR)
+
+    def _live_migrate_instance(self, nova, destination):
+        result = None
+        try:
+            result = nova.live_migrate_instance(instance_id=self.instance_uuid,
+                                                dest_hostname=destination)
+        except nova_helper.nvexceptions.ClientException as e:
+            if e.code == 400:
+                LOG.debug("Live migration of instance %s failed. "
+                          "Trying to live migrate using block migration."
+                          % self.instance_uuid)
+                result = nova.live_migrate_instance(
+                    instance_id=self.instance_uuid,
+                    dest_hostname=destination,
+                    block_migration=True)
+            else:
+                LOG.debug("Nova client exception occured while live migrating "
+                          "instance %s.Exception: %s" %
+                          (self.instance_uuid, e))
+        except Exception:
+            LOG.critical(_LC("Unexpected error occured. Migration failed for"
+                             "instance %s. Leaving instance on previous "
+                             "host."), self.instance_uuid)
+
+        return result
+
+    def migrate(self, destination):
+        nova = nova_helper.NovaHelper(osc=self.osc)
+        LOG.debug("Migrate instance %s to %s", self.instance_uuid,
+                  destination)
+        instance = nova.find_instance(self.instance_uuid)
+        if instance:
+            if self.migration_type == 'live':
+                return self._live_migrate_instance(nova, destination)
+            else:
+                raise exception.Invalid(
+                    message=(_('Migration of type %(migration_type)s is not '
+                               'supported.') %
+                             {'migration_type': self.migration_type}))
+        else:
+            raise exception.InstanceNotFound(name=self.instance_uuid)
+
+    def execute(self):
+        return self.migrate(destination=self.dst_hypervisor)
+
+    def revert(self):
+        return self.migrate(destination=self.src_hypervisor)
+
+    def precondition(self):
+        # todo(jed) check if the instance exist/ check if the instance is on
+        # the src_hypervisor
+        pass
+
+    def postcondition(self):
+        # todo(jed) we can image to check extra parameters (nework reponse,ect)
+        pass

watcher/applier/actions/nop.py

@@ -0,0 +1,67 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from oslo_log import log
+import six
+import voluptuous
+
+from watcher.applier.actions import base
+
+
+LOG = log.getLogger(__name__)
+
+
+class Nop(base.BaseAction):
+    """logs a message
+
+    The action schema is::
+
+        schema = Schema({
+         'message': str,
+        })
+
+    The `message` is the actual message that will be logged.
+    """
+
+    MESSAGE = 'message'
+
+    @property
+    def schema(self):
+        return voluptuous.Schema({
+            voluptuous.Required(self.MESSAGE): voluptuous.Any(
+                voluptuous.Any(*six.string_types), None)
+        })
+
+    @property
+    def message(self):
+        return self.input_parameters.get(self.MESSAGE)
+
+    def execute(self):
+        LOG.debug("executing action NOP message:%s ", self.message)
+        return True
+
+    def revert(self):
+        LOG.debug("revert action NOP")
+        return True
+
+    def precondition(self):
+        pass
+
+    def postcondition(self):
+        pass

watcher/applier/actions/sleep.py

@@ -0,0 +1,68 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import time
+
+
+from oslo_log import log
+import voluptuous
+
+from watcher.applier.actions import base
+
+LOG = log.getLogger(__name__)
+
+
+class Sleep(base.BaseAction):
+    """Makes the executor of the action plan wait for a given duration
+
+    The action schema is::
+
+        schema = Schema({
+         'duration': float,
+        })
+
+    The `duration` is expressed in seconds.
+    """
+
+    DURATION = 'duration'
+
+    @property
+    def schema(self):
+        return voluptuous.Schema({
+            voluptuous.Required(self.DURATION, default=1):
+                voluptuous.All(float, voluptuous.Range(min=0))
+        })
+
+    @property
+    def duration(self):
+        return int(self.input_parameters.get(self.DURATION))
+
+    def execute(self):
+        LOG.debug("Starting action Sleep duration:%s ", self.duration)
+        time.sleep(self.duration)
+        return True
+
+    def revert(self):
+        LOG.debug("revert action Sleep")
+        return True
+
+    def precondition(self):
+        pass
+
+    def postcondition(self):
+        pass

watcher/applier/base.py

@@ -17,6 +17,14 @@
 # limitations under the License.
 #
 
+"""
+This component is in charge of executing the
+:ref:`Action Plan <action_plan_definition>` built by the
+:ref:`Watcher Decision Engine <watcher_decision_engine_definition>`.
+
+See: :doc:`../architecture` for more details on this component.
+"""
+
 import abc
 import six
 

watcher/applier/default.py

@@ -16,25 +16,49 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+from oslo_config import cfg
+from oslo_log import log
 
-from watcher.applier.base import BaseApplier
+from watcher.applier import base
-from watcher.applier.execution.executor import ActionPlanExecutor
+from watcher.applier.workflow_engine.loading import default
-from watcher.objects import Action
+from watcher import objects
-from watcher.objects import ActionPlan
+
+LOG = log.getLogger(__name__)
+CONF = cfg.CONF
 
 
-class DefaultApplier(BaseApplier):
+class DefaultApplier(base.BaseApplier):
-    def __init__(self, manager_applier, context):
+    def __init__(self, context, applier_manager):
         super(DefaultApplier, self).__init__()
-        self.manager_applier = manager_applier
+        self._applier_manager = applier_manager
-        self.context = context
+        self._loader = default.DefaultWorkFlowEngineLoader()
-        self.executor = ActionPlanExecutor(manager_applier, context)
+        self._engine = None
+        self._context = context
+
+    @property
+    def context(self):
+        return self._context
+
+    @property
+    def applier_manager(self):
+        return self._applier_manager
+
+    @property
+    def engine(self):
+        if self._engine is None:
+            selected_workflow_engine = CONF.watcher_applier.workflow_engine
+            LOG.debug("Loading workflow engine %s ", selected_workflow_engine)
+            self._engine = self._loader.load(
+                name=selected_workflow_engine,
+                context=self.context,
+                applier_manager=self.applier_manager)
+        return self._engine
 
     def execute(self, action_plan_uuid):
-        action_plan = ActionPlan.get_by_uuid(self.context, action_plan_uuid)
+        LOG.debug("Executing action plan %s ", action_plan_uuid)
+        action_plan = objects.ActionPlan.get_by_uuid(self.context,
+                                                     action_plan_uuid)
         # todo(jed) remove direct access to dbapi need filter in object
-        actions = Action.dbapi.get_action_list(self.context,
+        filters = {'action_plan_id': action_plan.id}
-                                               filters={
+        actions = objects.Action.dbapi.get_action_list(self.context, filters)
-                                                   'action_plan_id':
+        return self.engine.execute(actions)
-                                                       action_plan.id})
-        return self.executor.execute(actions)

watcher/applier/execution/deploy_phase.py

@@ -1,56 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-from oslo_log import log
-
-LOG = log.getLogger(__name__)
-
-
-class DeployPhase(object):
-    def __init__(self, executor):
-        # todo(jed) oslo_conf 10 secondes
-        self._max_timeout = 100000
-        self._actions = []
-        self._executor = executor
-
-    @property
-    def actions(self):
-        return self._actions
-
-    @property
-    def max_timeout(self):
-        return self._max_timeout
-
-    @max_timeout.setter
-    def max_timeout(self, m):
-        self._max_timeout = m
-
-    def populate(self, action):
-        self._actions.append(action)
-
-    def execute_primitive(self, primitive):
-        future = primitive.execute(primitive)
-        return future.result(self.max_timeout)
-
-    def rollback(self):
-        reverted = sorted(self.actions, reverse=True)
-        for primitive in reverted:
-            try:
-                self.execute_primitive(primitive)
-            except Exception as e:
-                LOG.error(e)

watcher/applier/execution/executor.py

@@ -1,76 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-from oslo_log import log
-from watcher.applier.execution.deploy_phase import DeployPhase
-from watcher.applier.mapping.default import DefaultActionMapper
-from watcher.applier.messaging.events import Events
-from watcher.common.messaging.events.event import Event
-from watcher.objects import Action
-from watcher.objects.action_plan import Status
-
-LOG = log.getLogger(__name__)
-
-
-class ActionPlanExecutor(object):
-    def __init__(self, manager_applier, context):
-        self.manager_applier = manager_applier
-        self.context = context
-        self.deploy = DeployPhase(self)
-        self.mapper = DefaultActionMapper()
-
-    def get_primitive(self, action):
-        return self.mapper.build_primitive_from_action(action)
-
-    def notify(self, action, state):
-        db_action = Action.get_by_uuid(self.context, action.uuid)
-        db_action.state = state
-        db_action.save()
-        event = Event()
-        event.type = Events.LAUNCH_ACTION
-        event.data = {}
-        payload = {'action_uuid': action.uuid,
-                   'action_state': state}
-        self.manager_applier.topic_status.publish_event(event.type.name,
-                                                        payload)
-
-    def execute(self, actions):
-        for action in actions:
-            try:
-                self.notify(action, Status.ONGOING)
-                primitive = self.get_primitive(action)
-                result = self.deploy.execute_primitive(primitive)
-                if result is False:
-                    self.notify(action, Status.FAILED)
-                    self.deploy.rollback()
-                    return False
-                else:
-                    self.deploy.populate(primitive)
-                    self.notify(action, Status.SUCCEEDED)
-            except Exception as e:
-                LOG.debug(
-                    'The applier module failed to execute the action{0}  with '
-                    'the exception {1} '.format(
-                        action,
-                        unicode(e)))
-
-                LOG.error("Trigger a rollback")
-                self.notify(action, Status.FAILED)
-                self.deploy.rollback()
-                return False
-        return True

watcher/applier/manager.py

@@ -16,26 +16,30 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-from concurrent.futures import ThreadPoolExecutor
 
 from oslo_config import cfg
 from oslo_log import log
 
-from watcher.applier.messaging.trigger import TriggerActionPlan
+from watcher.applier.messaging import trigger
-from watcher.common.messaging.messaging_core import MessagingCore
+from watcher.common.messaging import messaging_core
 
 LOG = log.getLogger(__name__)
 CONF = cfg.CONF
 
+
 # Register options
 APPLIER_MANAGER_OPTS = [
-    cfg.IntOpt('applier_worker', default='1', help='The number of worker'),
+    cfg.IntOpt('workers',
-    cfg.StrOpt('topic_control',
+               default='1',
+               min=1,
+               required=True,
+               help='Number of workers for applier, default value is 1.'),
+    cfg.StrOpt('conductor_topic',
                default='watcher.applier.control',
                help='The topic name used for'
                     'control events, this topic '
                     'used for rpc call '),
-    cfg.StrOpt('topic_status',
+    cfg.StrOpt('status_topic',
                default='watcher.applier.status',
                help='The topic name used for '
                     'status events, this topic '
@@ -45,7 +49,11 @@ APPLIER_MANAGER_OPTS = [
     cfg.StrOpt('publisher_id',
                default='watcher.applier.api',
                help='The identifier used by watcher '
-                    'module on the message broker')
+                    'module on the message broker'),
+    cfg.StrOpt('workflow_engine',
+               default='taskflow',
+               required=True,
+               help='Select the engine to use to execute the workflow')
 ]
 
 opt_group = cfg.OptGroup(name='watcher_applier',
@@ -55,19 +63,17 @@ CONF.register_group(opt_group)
 CONF.register_opts(APPLIER_MANAGER_OPTS, opt_group)
 
 
-class ApplierManager(MessagingCore):
+class ApplierManager(messaging_core.MessagingCore):
     def __init__(self):
         super(ApplierManager, self).__init__(
             CONF.watcher_applier.publisher_id,
-            CONF.watcher_applier.topic_control,
+            CONF.watcher_applier.conductor_topic,
-            CONF.watcher_applier.topic_status,
+            CONF.watcher_applier.status_topic,
             api_version=self.API_VERSION,
         )
-        # shared executor of the workflow
+        self.conductor_topic_handler.add_endpoint(
-        self.executor = ThreadPoolExecutor(max_workers=1)
+            trigger.TriggerActionPlan(self))
-        # trigger action_plan
-        self.topic_control.add_endpoint(TriggerActionPlan(self))
 
     def join(self):
-        self.topic_control.join()
+        self.conductor_topic_handler.join()
-        self.topic_status.join()
+        self.status_topic_handler.join()

watcher/applier/mapping/base.py

@@ -1,33 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-import abc
-import six
-
-
-@six.add_metaclass(abc.ABCMeta)
-class BaseActionMapper(object):
-    @abc.abstractmethod
-    def build_primitive_from_action(self, action):
-        """Transform an action to a primitive
-
-        :type action: watcher.decision_engine.action.BaseAction
-        :return: the associated Primitive
-        """
-        raise NotImplementedError()

watcher/applier/mapping/default.py

@@ -1,47 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from watcher.applier.mapping.base import BaseActionMapper
-from watcher.applier.primitives.change_nova_service_state import \
-    ChangeNovaServiceState
-from watcher.applier.primitives.migration import Migrate
-from watcher.applier.primitives.nop import Nop
-from watcher.applier.primitives.power_state import ChangePowerState
-from watcher.common.exception import ActionNotFound
-from watcher.decision_engine.planner.default import Primitives
-
-
-class DefaultActionMapper(BaseActionMapper):
-    def build_primitive_from_action(self, action):
-        if action.action_type == Primitives.COLD_MIGRATE.value:
-            return Migrate(action.applies_to, Primitives.COLD_MIGRATE,
-                           action.src,
-                           action.dst)
-        elif action.action_type == Primitives.LIVE_MIGRATE.value:
-            return Migrate(action.applies_to, Primitives.COLD_MIGRATE,
-                           action.src,
-                           action.dst)
-        elif action.action_type == Primitives.HYPERVISOR_STATE.value:
-            return ChangeNovaServiceState(action.applies_to, action.parameter)
-        elif action.action_type == Primitives.POWER_STATE.value:
-            return ChangePowerState()
-        elif action.action_type == Primitives.NOP.value:
-            return Nop()
-        else:
-            raise ActionNotFound()

watcher/applier/messaging/event_types.py

@@ -17,9 +17,9 @@
 # limitations under the License.
 #
 
-from enum import Enum
+import enum
 
 
-class Events(Enum):
+class EventTypes(enum.Enum):
     LAUNCH_ACTION_PLAN = "launch_action_plan"
     LAUNCH_ACTION = "launch_action"

watcher/applier/messaging/trigger.py

@@ -16,30 +16,35 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+from concurrent import futures
+
+from oslo_config import cfg
 from oslo_log import log
 
-from watcher.applier.action_plan.default import DefaultActionPlanHandler
+from watcher.applier.action_plan import default
 
 LOG = log.getLogger(__name__)
+CONF = cfg.CONF
 
 
 class TriggerActionPlan(object):
-    def __init__(self, manager_applier):
+    def __init__(self, applier_manager):
-        self.manager_applier = manager_applier
+        self.applier_manager = applier_manager
+        workers = CONF.watcher_applier.workers
+        self.executor = futures.ThreadPoolExecutor(max_workers=workers)
 
     def do_launch_action_plan(self, context, action_plan_uuid):
         try:
-            cmd = DefaultActionPlanHandler(context,
+            cmd = default.DefaultActionPlanHandler(context,
-                                           self.manager_applier,
+                                                   self.applier_manager,
                                                    action_plan_uuid)
             cmd.execute()
         except Exception as e:
             LOG.exception(e)
 
     def launch_action_plan(self, context, action_plan_uuid):
-        LOG.debug("Trigger ActionPlan %s" % action_plan_uuid)
+        LOG.debug("Trigger ActionPlan %s", action_plan_uuid)
         # submit
-        self.manager_applier.executor.submit(self.do_launch_action_plan,
+        self.executor.submit(self.do_launch_action_plan, context,
-                                             context,
                              action_plan_uuid)
         return action_plan_uuid

watcher/applier/primitives/change_nova_service_state.py

@@ -1,83 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-
-from oslo_config import cfg
-
-
-from watcher._i18n import _
-from watcher.applier.primitives.base import BasePrimitive
-from watcher.applier.promise import Promise
-from watcher.common.exception import IllegalArgumentException
-from watcher.common.keystone import KeystoneClient
-from watcher.common.nova import NovaClient
-from watcher.decision_engine.model.hypervisor_state import HypervisorState
-
-CONF = cfg.CONF
-
-
-class ChangeNovaServiceState(BasePrimitive):
-    def __init__(self, host, state):
-        """This class allows us to change the state of nova-compute service.
-
-        :param host: the uuid of the host
-        :param state: (enabled/disabled)
-        """
-        super(BasePrimitive, self).__init__()
-        self._host = host
-        self._state = state
-
-    @property
-    def host(self):
-        return self._host
-
-    @property
-    def state(self):
-        return self._state
-
-    @Promise
-    def execute(self):
-        target_state = None
-        if self.state == HypervisorState.OFFLINE.value:
-            target_state = False
-        elif self.status == HypervisorState.ONLINE.value:
-            target_state = True
-        return self.nova_manage_service(target_state)
-
-    @Promise
-    def undo(self):
-        target_state = None
-        if self.state == HypervisorState.OFFLINE.value:
-            target_state = True
-        elif self.state == HypervisorState.ONLINE.value:
-            target_state = False
-        return self.nova_manage_service(target_state)
-
-    def nova_manage_service(self, state):
-        if state is None:
-            raise IllegalArgumentException(
-                _("The target state is not defined"))
-
-        keystone = KeystoneClient()
-        wrapper = NovaClient(keystone.get_credentials(),
-                             session=keystone.get_session())
-        if state is True:
-            return wrapper.enable_service_nova_compute(self.host)
-        else:
-            return wrapper.disable_service_nova_compute(self.host)

watcher/applier/primitives/migration.py

@@ -1,88 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from keystoneclient.auth.identity import v3
-from keystoneclient import session
-from oslo_config import cfg
-
-from watcher.applier.primitives.base import BasePrimitive
-from watcher.applier.promise import Promise
-from watcher.common.keystone import KeystoneClient
-from watcher.common.nova import NovaClient
-from watcher.decision_engine.planner.default import Primitives
-
-CONF = cfg.CONF
-
-
-class Migrate(BasePrimitive):
-    def __init__(self, vm_uuid=None,
-                 migration_type=None,
-                 source_hypervisor=None,
-                 destination_hypervisor=None):
-        super(BasePrimitive, self).__init__()
-        self.instance_uuid = vm_uuid
-        self.migration_type = migration_type
-        self.source_hypervisor = source_hypervisor
-        self.destination_hypervisor = destination_hypervisor
-
-    def migrate(self, destination):
-        keystone = KeystoneClient()
-        wrapper = NovaClient(keystone.get_credentials(),
-                             session=keystone.get_session())
-        instance = wrapper.find_instance(self.instance_uuid)
-        if instance:
-            project_id = getattr(instance, "tenant_id")
-
-            creds2 = \
-                {'auth_url': CONF.keystone_authtoken.auth_uri,
-                 'username': CONF.keystone_authtoken.admin_user,
-                 'password': CONF.keystone_authtoken.admin_password,
-                 'project_id': project_id,
-                 'user_domain_name': "default",
-                 'project_domain_name': "default"}
-            auth2 = v3.Password(auth_url=creds2['auth_url'],
-                                username=creds2['username'],
-                                password=creds2['password'],
-                                project_id=creds2['project_id'],
-                                user_domain_name=creds2[
-                                    'user_domain_name'],
-                                project_domain_name=creds2[
-                                    'project_domain_name'])
-            sess2 = session.Session(auth=auth2)
-            wrapper2 = NovaClient(creds2, session=sess2)
-
-            # todo(jed) remove Primitves
-            if self.migration_type is Primitives.COLD_MIGRATE:
-                return wrapper2.live_migrate_instance(
-                    instance_id=self.instance_uuid,
-                    dest_hostname=destination,
-                    block_migration=True)
-            elif self.migration_type is Primitives.LIVE_MIGRATE:
-                return wrapper2.live_migrate_instance(
-                    instance_id=self.instance_uuid,
-                    dest_hostname=destination,
-                    block_migration=False)
-
-    @Promise
-    def execute(self):
-        return self.migrate(self.destination_hypervisor)
-
-    @Promise
-    def undo(self):
-        return self.migrate(self.source_hypervisor)

watcher/applier/primitives/nop.py

@@ -1,40 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from oslo_log import log
-
-
-from watcher.applier.primitives.base import BasePrimitive
-from watcher.applier.promise import Promise
-
-
-LOG = log.getLogger(__name__)
-
-
-class Nop(BasePrimitive):
-
-    @Promise
-    def execute(self):
-        LOG.debug("executing NOP command")
-        return True
-
-    @Promise
-    def undo(self):
-        LOG.debug("undo NOP command")
-        return True

watcher/applier/primitives/power_state.py

@@ -1,32 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from watcher.applier.primitives.base import BasePrimitive
-from watcher.applier.promise import Promise
-
-
-class ChangePowerState(BasePrimitive):
-
-    @Promise
-    def execute(self):
-        raise NotImplementedError  # pragma:no cover
-
-    @Promise
-    def undo(self):
-        raise NotImplementedError  # pragma:no cover

watcher/applier/promise.py

@@ -1,50 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from concurrent.futures import Future
-from concurrent.futures import ThreadPoolExecutor
-
-
-class Promise(object):
-    executor = ThreadPoolExecutor(
-        max_workers=10)
-
-    def __init__(self, func):
-        self.func = func
-
-    def resolve(self, *args, **kwargs):
-        resolved_args = []
-        resolved_kwargs = {}
-
-        for i, arg in enumerate(args):
-            if isinstance(arg, Future):
-                resolved_args.append(arg.result())
-            else:
-                resolved_args.append(arg)
-
-        for kw, arg in kwargs.items():
-            if isinstance(arg, Future):
-                resolved_kwargs[kw] = arg.result()
-            else:
-                resolved_kwargs[kw] = arg
-
-        return self.func(*resolved_args, **resolved_kwargs)
-
-    def __call__(self, *args, **kwargs):
-        return self.executor.submit(self.resolve, *args, **kwargs)

watcher/applier/rpcapi.py

@@ -23,8 +23,8 @@ import oslo_messaging as om
 from watcher.applier.manager import APPLIER_MANAGER_OPTS
 from watcher.applier.manager import opt_group
 from watcher.common import exception
-from watcher.common.messaging.messaging_core import MessagingCore
+from watcher.common.messaging import messaging_core
-from watcher.common.messaging.notification_handler import NotificationHandler
+from watcher.common.messaging import notification_handler as notification
 from watcher.common import utils
 
 
@@ -34,22 +34,22 @@ CONF.register_group(opt_group)
 CONF.register_opts(APPLIER_MANAGER_OPTS, opt_group)
 
 
-class ApplierAPI(MessagingCore):
+class ApplierAPI(messaging_core.MessagingCore):
 
     def __init__(self):
         super(ApplierAPI, self).__init__(
             CONF.watcher_applier.publisher_id,
-            CONF.watcher_applier.topic_control,
+            CONF.watcher_applier.conductor_topic,
-            CONF.watcher_applier.topic_status,
+            CONF.watcher_applier.status_topic,
             api_version=self.API_VERSION,
         )
-        self.handler = NotificationHandler(self.publisher_id)
+        self.handler = notification.NotificationHandler(self.publisher_id)
         self.handler.register_observer(self)
-        self.topic_status.add_endpoint(self.handler)
+        self.status_topic_handler.add_endpoint(self.handler)
         transport = om.get_transport(CONF)
 
         target = om.Target(
-            topic=CONF.watcher_applier.topic_control,
+            topic=CONF.watcher_applier.conductor_topic,
             version=self.API_VERSION,
         )
 
@@ -63,10 +63,3 @@ class ApplierAPI(MessagingCore):
         return self.client.call(
             context.to_dict(), 'launch_action_plan',
             action_plan_uuid=action_plan_uuid)
-
-    def event_receive(self, event):
-        try:
-            pass
-        except Exception as e:
-            LOG.exception(e)
-            raise

watcher/applier/workflow_engine/base.py

@@ -0,0 +1,70 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2016 b<>com
+#
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import abc
+
+import six
+
+from watcher.applier.actions import factory
+from watcher.applier.messaging import event_types
+from watcher.common import clients
+from watcher.common.messaging.events import event
+from watcher import objects
+
+
+@six.add_metaclass(abc.ABCMeta)
+class BaseWorkFlowEngine(object):
+    def __init__(self, context=None, applier_manager=None):
+        self._context = context
+        self._applier_manager = applier_manager
+        self._action_factory = factory.ActionFactory()
+        self._osc = None
+
+    @property
+    def context(self):
+        return self._context
+
+    @property
+    def osc(self):
+        if not self._osc:
+            self._osc = clients.OpenStackClients()
+        return self._osc
+
+    @property
+    def applier_manager(self):
+        return self._applier_manager
+
+    @property
+    def action_factory(self):
+        return self._action_factory
+
+    def notify(self, action, state):
+        db_action = objects.Action.get_by_uuid(self.context, action.uuid)
+        db_action.state = state
+        db_action.save()
+        ev = event.Event()
+        ev.type = event_types.EventTypes.LAUNCH_ACTION
+        ev.data = {}
+        payload = {'action_uuid': action.uuid,
+                   'action_state': state}
+        self.applier_manager.status_topic_handler.publish_event(
+            ev.type.name, payload)
+
+    @abc.abstractmethod
+    def execute(self, actions):
+        raise NotImplementedError()

watcher/applier/workflow_engine/default.py

@@ -0,0 +1,162 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2016 b<>com
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from oslo_log import log
+from taskflow import engines
+from taskflow.patterns import graph_flow as gf
+from taskflow import task
+
+from watcher._i18n import _LE, _LW, _LC
+from watcher.applier.workflow_engine import base
+from watcher.common import exception
+from watcher.objects import action as obj_action
+
+LOG = log.getLogger(__name__)
+
+
+class DefaultWorkFlowEngine(base.BaseWorkFlowEngine):
+    """Taskflow as a workflow engine for Watcher
+
+    Full documentation on taskflow at
+    http://docs.openstack.org/developer/taskflow/
+    """
+
+    def decider(self, history):
+        # FIXME(jed) not possible with the current Watcher Planner
+        #
+        # decider – A callback function that will be expected to
+        # decide at runtime whether v should be allowed to execute
+        # (or whether the execution of v should be ignored,
+        # and therefore not executed). It is expected to take as single
+        # keyword argument history which will be the execution results of
+        # all u decideable links that have v as a target. It is expected
+        # to return a single boolean
+        # (True to allow v execution or False to not).
+        return True
+
+    def execute(self, actions):
+        try:
+            # NOTE(jed) We want to have a strong separation of concern
+            # between the Watcher planner and the Watcher Applier in order
+            # to us the possibility to support several workflow engine.
+            # We want to provide the 'taskflow' engine by
+            # default although we still want to leave the possibility for
+            # the users to change it.
+            # todo(jed) we need to change the way the actions are stored.
+            # The current implementation only use a linked list of actions.
+            # todo(jed) add olso conf for retry and name
+            flow = gf.Flow("watcher_flow")
+            previous = None
+            for a in actions:
+                task = TaskFlowActionContainer(a, self)
+                flow.add(task)
+                if previous is None:
+                    previous = task
+                    # we have only one Action in the Action Plan
+                    if len(actions) == 1:
+                        nop = TaskFlowNop()
+                        flow.add(nop)
+                        flow.link(previous, nop)
+                else:
+                    # decider == guard (UML)
+                    flow.link(previous, task, decider=self.decider)
+                    previous = task
+
+            e = engines.load(flow)
+            e.run()
+
+        except Exception as e:
+            raise exception.WorkflowExecutionException(error=e)
+
+
+class TaskFlowActionContainer(task.Task):
+    def __init__(self, db_action, engine):
+        name = "action_type:{0} uuid:{1}".format(db_action.action_type,
+                                                 db_action.uuid)
+        super(TaskFlowActionContainer, self).__init__(name=name)
+        self._db_action = db_action
+        self._engine = engine
+        self.loaded_action = None
+
+    @property
+    def action(self):
+        if self.loaded_action is None:
+            action = self.engine.action_factory.make_action(
+                self._db_action,
+                osc=self._engine.osc)
+            self.loaded_action = action
+        return self.loaded_action
+
+    @property
+    def engine(self):
+        return self._engine
+
+    def pre_execute(self):
+        try:
+            self.engine.notify(self._db_action,
+                               obj_action.State.ONGOING)
+            LOG.debug("Precondition action %s", self.name)
+            self.action.precondition()
+        except Exception as e:
+            LOG.exception(e)
+            self.engine.notify(self._db_action,
+                               obj_action.State.FAILED)
+            raise
+
+    def execute(self, *args, **kwargs):
+        try:
+            LOG.debug("Running action %s", self.name)
+
+            self.action.execute()
+            self.engine.notify(self._db_action,
+                               obj_action.State.SUCCEEDED)
+        except Exception as e:
+            LOG.exception(e)
+            LOG.error(_LE('The WorkFlow Engine has failed '
+                          'to execute the action %s'), self.name)
+
+            self.engine.notify(self._db_action,
+                               obj_action.State.FAILED)
+            raise
+
+    def post_execute(self):
+        try:
+            LOG.debug("postcondition action %s", self.name)
+            self.action.postcondition()
+        except Exception as e:
+            LOG.exception(e)
+            self.engine.notify(self._db_action,
+                               obj_action.State.FAILED)
+            raise
+
+    def revert(self, *args, **kwargs):
+        LOG.warning(_LW("Revert action %s"), self.name)
+        try:
+            # todo(jed) do we need to update the states in case of failure ?
+            self.action.revert()
+        except Exception as e:
+            LOG.exception(e)
+            LOG.critical(_LC("Oops! We need disaster recover plan"))
+
+
+class TaskFlowNop(task.Task):
+    """This class is use in case of the workflow have only one Action.
+
+    We need at least two atoms to create a link
+    """
+    def execute(self):
+        pass

watcher/applier/workflow_engine/loading/default.py

@@ -0,0 +1,30 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import unicode_literals
+
+from oslo_log import log
+
+from watcher.common.loader import default
+
+LOG = log.getLogger(__name__)
+
+
+class DefaultWorkFlowEngineLoader(default.DefaultLoader):
+    def __init__(self):
+        super(DefaultWorkFlowEngineLoader, self).__init__(
+            namespace='watcher_workflow_engines')

watcher/cmd/applier.py

@@ -25,7 +25,7 @@ from oslo_config import cfg
 from oslo_log import log as logging
 
 from watcher import _i18n
-from watcher.applier.manager import ApplierManager
+from watcher.applier import manager
 from watcher.common import service
 
 LOG = logging.getLogger(__name__)
@@ -40,6 +40,6 @@ def main():
     LOG.debug("Configuration:")
     cfg.CONF.log_opt_values(LOG, std_logging.DEBUG)
 
-    server = ApplierManager()
+    server = manager.ApplierManager()
     server.connect()
     server.join()