Fixed tempest test bug

has_audit_succeeded was not implemented so I added it back.

Change-Id: Ic567ff56ea6d513c32fbe7ad08cca96b5dfb15e8
Closes-Bug: #1537144

.gitignore

@@ -43,6 +43,7 @@ output/*/index.html
 
 # Sphinx
 doc/build
+doc/source/api
 
 # pbr generates these
 AUTHORS

devstack/lib/watcher

@@ -0,0 +1,258 @@
+#!/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
+    if [[  ! -d $WATCHER_CONF_DIR  ]]; then
+        sudo mkdir -p $WATCHER_CONF_DIR
+        sudo chown $STACK_USER $WATCHER_CONF_DIR
+    fi
+
+    install_default_policy watcher
+
+    # Rebuild the config file from scratch
+    create_watcher_conf
+}
+
+# create_watcher_accounts() - Set up common required watcher accounts
+#
+# Project              User         Roles
+# ------------------------------------------------------------------
+# SERVICE_TENANT_NAME  watcher      service
+function create_watcher_accounts {
+    create_service_user "watcher" "admin"
+
+    if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
+        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"
+    fi
+}
+
+# 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
+
+    iniset $WATCHER_CONF keystone_authtoken admin_user watcher
+    iniset $WATCHER_CONF keystone_authtoken admin_password $SERVICE_PASSWORD
+    iniset $WATCHER_CONF keystone_authtoken admin_tenant_name $SERVICE_TENANT_NAME
+
+    configure_auth_token_middleware $WATCHER_CONF watcher $WATCHER_AUTH_CACHE_DIR
+
+    iniset $WATCHER_CONF keystone_authtoken auth_uri $KEYSTONE_SERVICE_URI/v3
+    iniset $WATCHER_CONF keystone_authtoken auth_version v3
+
+    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 mkdir -p $WATCHER_AUTH_CACHE_DIR
+    sudo chown $STACK_USER $WATCHER_AUTH_CACHE_DIR
+    rm -f $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
-Watcher components.
+The AMQP message bus handles internal asynchronous communications between the
+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
 -----------
@@ -121,14 +129,14 @@ 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/>`_
 
-.. _watcher_database_definition:
+.. _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
-:ref:`Watcher CLI <watcher_cli_definition>`:
+by the :ref:`Watcher API <archi_watcher_api_definition>` or the
+:ref:`Watcher CLI <archi_watcher_cli_definition>`:
 
 -  :ref:`Audit templates <audit_template_definition>`
 -  :ref:`Audits <audit_definition>`
@@ -139,7 +147,7 @@ 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 +167,7 @@ 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 +177,197 @@ 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>`
-(e.g., the data stored in the Nova database)
+    :ref:`Managed resources <managed_resource_definition>`
+    (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
+-------------------
+
+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
+-------------------------
+
+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 +11,14 @@
 # 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 = [
     'sphinx.ext.autodoc',
-    # 'sphinx.ext.intersphinx',
     'sphinx.ext.viewcode',
     'sphinxcontrib.httpdomain',
     'sphinxcontrib.pecanwsme.rest',
@@ -46,8 +41,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'watcher'
-copyright = u'2015, OpenStack Foundation'
+project = u'Watcher'
+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 +57,14 @@ 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 +76,22 @@ 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/deploy/configuration.rst

@@ -318,3 +318,33 @@ 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 +38,8 @@ If you need help on a specific command, you can use:
 
   $ watcher help COMMAND
 
+.. _`installation guide`: https://factory.b-com.com/www/watcher/doc/python-watcherclient
+
 Seeing what the Watcher CLI can do ?
 ------------------------------------
 We can see all of the commands available with Watcher CLI by running the
@@ -90,7 +101,7 @@ 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 +130,4 @@ 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

doc/source/dev/devstack.rst

@@ -0,0 +1,133 @@
+..
+      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.  If you have no experience with DevStack, you
+should check out the `DevStack documentation`_ and be comfortable with the
+basics of DevStack before attempting to get a multinode DevStack setup with
+the Watcher plugin.
+
+You can set up the Watcher services quickly and easily using a Watcher
+DevStack plugin.  See `PluginModelDocs`_ for information on DevStack's plugin
+model.
+
+.. _DevStack documentation: http://docs.openstack.org/developer/devstack/
+.. _PluginModelDocs: http://docs.openstack.org/developer/devstack/plugins.html
+
+It is recommended that you build off of the provided example local.conf files
+(`local.conf.controller`_, `local.conf.compute`_).  You'll likely want to
+configure something to obtain metrics, such as Ceilometer.  Ceilometer is used
+in the example local.conf files.
+
+To configure the Watcher services 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
+
+Then run devstack normally::
+
+    cd /opt/stack/devstack
+    ./stack.sh
+
+.. _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.

doc/source/dev/environment.rst

@@ -4,9 +4,9 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-============================================
-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.
@@ -75,17 +75,13 @@ 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
 
-      $ 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
+    $ sudo yum install openssl-devel libffi-devel mysql-devel
 
 
 PyPi Packages and VirtualEnv
@@ -287,4 +283,3 @@ 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/strategy-plugin.rst

@@ -4,22 +4,20 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-===============
-Watcher plugins
-===============
+=================================
+Build a new optimization strategy
+=================================
 
-Writing a Watcher Decision Engine plugin
-========================================
-
-Watcher has an external :ref:`strategy <strategy_definition>` plugin interface
-which gives anyone the ability to integrate an external :ref:`strategy
-<strategy_definition>` in order to make use of placement algorithms.
+Watcher Decision Engine has an external :ref:`strategy <strategy_definition>`
+plugin interface 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
 Stategies 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
@@ -27,7 +25,7 @@ use your strategy.
 
 
 Creating a new plugin
----------------------
+=====================
 
 First of all you have to:
 
@@ -65,20 +63,21 @@ 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
+.. automodule:: watcher.decision_engine.strategy.strategies.base
     :noindex:
 
 .. autoclass:: 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
@@ -102,7 +101,7 @@ 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
@@ -127,18 +126,32 @@ 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.
+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.
 
-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.
+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
@@ -160,7 +173,7 @@ Using that you can now query the values for that specific metric:
  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.
 
@@ -169,6 +182,7 @@ Here below is the abstract ``BaseClusterHistory`` class of the Helper.
 
 .. autoclass:: BaseClusterHistory
     :members:
+    :noindex:
 
 
 The following snippet code shows how to create a Cluster History class:

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
-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>`
+.. watcher-term:: watcher.api.controllers.v1.action
 
 .. _action_plan_definition:
 
 Action Plan
 ===========
 
-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/>`_.
-
-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>`
+.. watcher-term:: watcher.api.controllers.v1.action_plan
 
 .. _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
-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>`
+.. watcher-term:: watcher.api.controllers.v1.audit
 
 .. _audit_template_definition:
 
 Audit Template
 ==============
 
-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.
+.. watcher-term:: watcher.api.controllers.v1.audit_template
 
 .. _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
-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, ...).
+.. watcher-term:: watcher.metrics_engine.cluster_model_collector.api
 
 .. _cluster_history_definition:
 
 Cluster History
 ===============
 
-The :ref:`Cluster History <cluster_history_definition>` contains all the
-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,...).
+.. watcher-term:: watcher.metrics_engine.cluster_history.api
 
 .. _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
-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, ...
+.. watcher-term:: watcher.api.controllers.v1.goal
 
 
 .. _host_aggregates_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
-: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.
+.. watcher-term:: watcher.decision_engine.solution.base
 
 .. _strategy_definition:
 
 Strategy
 ========
 
-A :ref:`Strategy <strategy_definition>` is an algorithm implementation which is
-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-term::  watcher.decision_engine.strategy.strategies.base
 
 .. _watcher_applier_definition:
 
 Watcher Applier
 ===============
 
-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.
+.. watcher-term:: watcher.applier.base
 
 .. _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
-: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-term::  watcher.decision_engine.manager
 
 .. _watcher_planner_definition:
 
 Watcher Planner
 ===============
 
-The :ref:`Watcher Planner <watcher_planner_definition>` is part of the
-: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.
+.. watcher-term:: watcher.decision_engine.planner.base
 

doc/source/image_src/plantuml/action_plan_state_machine.txt

@@ -0,0 +1,16 @@
+@startuml
+
+[*] --> RECOMMENDED: The Watcher Planner\ncreates the Action Plan
+RECOMMENDED --> TRIGGERED: Administrator launches\nthe Action Plan
+TRIGGERED --> 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
+TRIGGERED --> 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

doc/source/images/architecture.svg

@@ -41,36 +41,31 @@
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   </g>
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doc/source/images/functional_data_model.svg

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+  <g>
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+    <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>
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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="219.217" y="61">Consumes resources</text>
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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>
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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="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>
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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="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>
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+</svg>

doc/source/index.rst

@@ -4,20 +4,32 @@
 
           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
-on-the-go.
+Watcher project consists of several source code repositories:
 
-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.
+
+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/
+
 Developer Guide
 ===============
 
@@ -29,9 +41,18 @@ Introduction
 
   glossary
   architecture
-  dev/environment
   dev/contributing
-  dev/plugins
+
+
+Getting Started
+---------------
+
+.. toctree::
+  :maxdepth: 1
+
+  dev/environment
+  dev/devstack
+  deploy/configuration
 
 
 API References
@@ -42,25 +63,44 @@ API References
 
   webapi/v1
 
+Plugins
+-------
+
+.. toctree::
+  :maxdepth: 1
+
+  dev/strategy-plugin
+
+
 Admin Guide
 ===========
 
-Overview
---------
+Introduction
+------------
 
 .. toctree::
   :maxdepth: 1
 
-  deploy/user-guide
   deploy/installation
+  deploy/user-guide
 
-Commands
---------
+Watcher Manual Pages
+====================
 
 .. toctree::
-  :maxdepth: 1
+   :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

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 +4,15 @@
 
           https://creativecommons.org/licenses/by/3.0/
 
-=====================
- RESTful Web API (v1)
-=====================
+====================
+RESTful Web API (v1)
+====================
 
 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 +20,6 @@ Audit Templates
 .. autotype:: watcher.api.controllers.v1.audit_template.AuditTemplate
    :members:
 
-
 Audits
 ======
 
@@ -33,24 +32,22 @@ Audits
 .. autotype:: watcher.api.controllers.v1.audit.Audit
    :members:
 
-
 Links
 =====
 
 .. autotype:: watcher.api.controllers.link.Link
    :members:
 
-
-ActionPlans
-===========
+Action Plans
+============
 
 .. 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:
 
 

requirements.txt

@@ -26,4 +26,5 @@ python-openstackclient>=1.5.0
 six>=1.9.0
 SQLAlchemy>=0.9.9,<1.1.0
 stevedore>=1.5.0    # Apache-2.0
+taskflow>=1.25.0 # Apache-2.0
 WSME>=0.7

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
 
@@ -46,6 +50,28 @@ watcher_strategies =
     basic = watcher.decision_engine.strategy.strategies.basic_consolidation:BasicConsolidation
     outlet_temp_control = watcher.decision_engine.strategy.strategies.outlet_temp_control:OutletTempControl
 
+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]
+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
 build-dir = doc/build
@@ -66,6 +92,6 @@ 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

test-requirements.txt

@@ -4,9 +4,11 @@
 
 coverage>=3.6
 discover
+doc8 # Apache-2.0
 hacking>=0.10.2,<0.11
 mock>=1.2
 oslotest>=1.10.0  # Apache-2.0
+os-testr>=0.1.0
 python-subunit>=0.0.18
 testrepository>=0.0.18
 testscenarios>=0.4
@@ -19,3 +21,4 @@ sphinxcontrib-pecanwsme>=0.8
 
 # For PyPI distribution
 twine
+

tox.ini

@@ -14,19 +14,25 @@ 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}'
 
 [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}
@@ -42,10 +48,8 @@ commands =
                         --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/
 
@@ -59,3 +63,8 @@ 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

watcher/api/controllers/v1/action.py

@@ -15,6 +15,42 @@
 # 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>`
+"""
+
 import datetime
 
 import pecan
@@ -87,9 +123,6 @@ 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"""
 
@@ -99,17 +132,11 @@ class Action(base.APIBase):
     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
-    """Additionnal parameter"""
+    input_parameters = wtypes.DictType(wtypes.text, wtypes.text)
+    """One or more key/value pairs """
 
     next_uuid = wsme.wsproperty(types.uuid, _get_next_uuid,
                                 _set_next_uuid,

watcher/api/controllers/v1/action_plan.py

@@ -15,6 +15,60 @@
 # 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/>`_.
+
+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>`
+"""  # noqa
+
 import datetime
 
 import pecan
@@ -23,21 +77,45 @@ 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):
@@ -230,9 +308,9 @@ class ActionPlansController(rest.RestController):
             sort_key=sort_key,
             sort_dir=sort_dir)
 
-    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, types.uuid,
-                         int, wtypes.text, wtypes.text, types.uuid)
-    def get_all(self, action_plan_uuid=None, marker=None, limit=None,
+    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, int, wtypes.text,
+                         wtypes.text, types.uuid)
+    def get_all(self, marker=None, limit=None,
                 sort_key='id', sort_dir='asc', audit_uuid=None):
         """Retrieve a list of action plans.
 
@@ -241,25 +319,23 @@ class ActionPlansController(rest.RestController):
         :param sort_key: column to sort results by. Default: id.
         :param sort_dir: direction to sort. "asc" or "desc". Default: asc.
         :param audit_uuid: Optional UUID of an audit, to get only actions
-        for that audit.
+            for that audit.
         """
         return self._get_action_plans_collection(
             marker, limit, sort_key, sort_dir, audit_uuid=audit_uuid)
 
-    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, types.uuid,
-                         int, wtypes.text, wtypes.text, types.uuid)
-    def detail(self, action_plan_uuid=None, marker=None, limit=None,
+    @wsme_pecan.wsexpose(ActionPlanCollection, types.uuid, int, wtypes.text,
+                         wtypes.text, types.uuid)
+    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.
         :param sort_dir: direction to sort. "asc" or "desc". Default: asc.
         :param audit_uuid: Optional UUID of an audit, to get only actions
-        for that audit.
+            for that audit.
         """
         # NOTE(lucasagomes): /detail should only work agaist collections
         parent = pecan.request.path.split('/')[:-1][-1]
@@ -302,10 +378,10 @@ 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 patch: a json PATCH document to apply to this audit template.
+        :param action_plan_uuid: UUID of a action plan.
+        :param patch: a json PATCH document to apply to this action plan.
         """
         launch_action_plan = True
         if self.from_actionsPlans:
@@ -322,6 +398,34 @@ 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.TRIGGERED),
+            (ap_objects.State.RECOMMENDED,
+             ap_objects.State.CANCELLED),
+            (ap_objects.State.ONGOING,
+             ap_objects.State.CANCELLED),
+            (ap_objects.State.TRIGGERED,
+             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.TRIGGERED:
+                launch_action_plan = True
+
         # Update only the fields that have changed
         for field in objects.ActionPlan.fields:
             try:
@@ -334,13 +438,14 @@ 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.TRIGGERED):
                 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 +15,40 @@
 # 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>`.
+
+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>`
+"""
+
 import datetime
 
 import pecan
@@ -23,6 +57,7 @@ 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
@@ -181,6 +216,7 @@ class AuditCollection(collection.Collection):
     """A list containing audits objects"""
 
     def __init__(self, **kwargs):
+        super(AuditCollection, self).__init__()
         self._type = 'audits'
 
     @staticmethod
@@ -257,10 +293,9 @@ class AuditsController(rest.RestController):
                                                   sort_key=sort_key,
                                                   sort_dir=sort_dir)
 
-    @wsme_pecan.wsexpose(AuditCollection, types.uuid,
-                         types.uuid, int, wtypes.text,
+    @wsme_pecan.wsexpose(AuditCollection, 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 +310,12 @@ class AuditsController(rest.RestController):
                                            sort_dir,
                                            audit_template=audit_template)
 
-    @wsme_pecan.wsexpose(AuditCollection, types.uuid,
-                         types.uuid, int, wtypes.text, wtypes.text)
-    def detail(self, audit_uuid=None, marker=None, limit=None,
+    @wsme_pecan.wsexpose(AuditCollection, types.uuid, int, wtypes.text,
+                         wtypes.text)
+    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 +354,11 @@ 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)

watcher/api/controllers/v1/audit_template.py

@@ -15,6 +15,39 @@
 # 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
 
 import pecan
@@ -131,6 +164,7 @@ class AuditTemplateCollection(collection.Collection):
     """A list containing audit templates objects"""
 
     def __init__(self, **kwargs):
+        super(AuditTemplateCollection, self).__init__()
         self._type = 'audit_templates'
 
     @staticmethod

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

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

watcher/applier/actions/base.py

@@ -16,30 +16,47 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+
 import abc
 
 import six
-from watcher.decision_engine.strategy.common.level import StrategyLevel
 
 
 @six.add_metaclass(abc.ABCMeta)
 class BaseAction(object):
     def __init__(self):
-        self._level = StrategyLevel.conservative
-        self._priority = 0
+        self._input_parameters = {}
+        self._applies_to = ""
 
     @property
-    def level(self):
-        return self._level
+    def input_parameters(self):
+        return self._input_parameters
 
-    @level.setter
-    def level(self, l):
-        self._level = l
+    @input_parameters.setter
+    def input_parameters(self, p):
+        self._input_parameters = p
 
     @property
-    def priority(self):
-        return self._priority
+    def applies_to(self):
+        return self._applies_to
 
-    @priority.setter
-    def priority(self, p):
-        self._priority = p
+    @applies_to.setter
+    def applies_to(self, a):
+        self._applies_to = a
+
+    @abc.abstractmethod
+    def execute(self):
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def revert(self):
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def precondition(self):
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def postcondition(self):
+        raise NotImplementedError()

watcher/applier/actions/change_nova_service_state.py

@@ -18,66 +18,55 @@
 #
 
 
-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
+from watcher.applier.actions import base
+from watcher.common import exception
+from watcher.common import keystone as kclient
+from watcher.common import nova as nclient
+from watcher.decision_engine.model import hypervisor_state as hstate
 
 
-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
+class ChangeNovaServiceState(base.BaseAction):
 
     @property
     def host(self):
-        return self._host
+        return self.applies_to
 
     @property
     def state(self):
-        return self._state
+        return self.input_parameters.get('state')
 
-    @Promise
     def execute(self):
         target_state = None
-        if self.state == HypervisorState.OFFLINE.value:
+        if self.state == hstate.HypervisorState.OFFLINE.value:
             target_state = False
-        elif self.status == HypervisorState.ONLINE.value:
+        elif self.status == hstate.HypervisorState.ONLINE.value:
             target_state = True
         return self.nova_manage_service(target_state)
 
-    @Promise
-    def undo(self):
+    def revert(self):
         target_state = None
-        if self.state == HypervisorState.OFFLINE.value:
+        if self.state == hstate.HypervisorState.OFFLINE.value:
             target_state = True
-        elif self.state == HypervisorState.ONLINE.value:
+        elif self.state == hstate.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"))
+            raise exception.IllegalArgumentException(
+                message=_("The target state is not defined"))
 
-        keystone = KeystoneClient()
-        wrapper = NovaClient(keystone.get_credentials(),
-                             session=keystone.get_session())
+        keystone = kclient.KeystoneClient()
+        wrapper = nclient.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)
+
+    def precondition(self):
+        pass
+
+    def postcondition(self):
+        pass

watcher/applier/actions/factory.py

@@ -0,0 +1,36 @@
+# -*- 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):
+        LOG.debug("Creating instance of %s", object_action.action_type)
+        loaded_action = self.action_loader.load(name=object_action.action_type)
+        loaded_action.input_parameters = object_action.input_parameters
+        loaded_action.applies_to = object_action.applies_to
+        return loaded_action

watcher/applier/actions/loading/default.py

@@ -13,12 +13,17 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from watcher.decision_engine.solution.default import DefaultSolution
-from watcher.tests import base
+#
+
+from __future__ import unicode_literals
+
+from oslo_log import log
+
+from watcher.common.loader import default
+
+LOG = log.getLogger(__name__)
 
 
-class TestDefaultSolution(base.BaseTestCase):
-    def test_default_solution(self):
-        solution = DefaultSolution()
-        solution.add_change_request("BLA")
-        self.assertEqual(solution.actions[0], "BLA")
+class DefaultActionLoader(default.DefaultLoader):
+    def __init__(self):
+        super(DefaultActionLoader, self).__init__(namespace='watcher_actions')

watcher/applier/actions/migration.py

@@ -0,0 +1,76 @@
+# -*- 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.actions import base
+from watcher.common import exception
+from watcher.common import keystone as kclient
+from watcher.common import nova as nclient
+
+LOG = log.getLogger(__name__)
+
+
+class Migrate(base.BaseAction):
+    @property
+    def instance_uuid(self):
+        return self.applies_to
+
+    @property
+    def migration_type(self):
+        return self.input_parameters.get('migration_type')
+
+    @property
+    def dst_hypervisor(self):
+        return self.input_parameters.get('dst_hypervisor')
+
+    @property
+    def src_hypervisor(self):
+        return self.input_parameters.get('src_hypervisor')
+
+    def migrate(self, destination):
+        keystone = kclient.KeystoneClient()
+        wrapper = nclient.NovaClient(keystone.get_credentials(),
+                                     session=keystone.get_session())
+        LOG.debug("Migrate instance %s to %s  ", self.instance_uuid,
+                  destination)
+        instance = wrapper.find_instance(self.instance_uuid)
+        if instance:
+            if self.migration_type == 'live':
+                return wrapper.live_migrate_instance(
+                    instance_id=self.instance_uuid, dest_hostname=destination)
+            else:
+                raise exception.InvalidParameterValue(err=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

@@ -19,22 +19,28 @@
 
 from oslo_log import log
 
-
-from watcher.applier.primitives.base import BasePrimitive
-from watcher.applier.promise import Promise
+from watcher.applier.actions import base
 
 
 LOG = log.getLogger(__name__)
 
 
-class Nop(BasePrimitive):
+class Nop(base.BaseAction):
+
+    @property
+    def message(self):
+        return self.input_parameters.get('message')
 
-    @Promise
     def execute(self):
-        LOG.debug("executing NOP command")
+        LOG.debug("executing action NOP message:%s ", self.message)
         return True
 
-    @Promise
-    def undo(self):
-        LOG.debug("undo NOP command")
+    def revert(self):
+        LOG.debug("revert action NOP")
         return True
+
+    def precondition(self):
+        pass
+
+    def postcondition(self):
+        pass

watcher/applier/actions/sleep.py

@@ -16,17 +16,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+import time
 
-from watcher.applier.primitives.base import BasePrimitive
-from watcher.applier.promise import Promise
+from oslo_log import log
+
+from watcher.applier.actions import base
 
 
-class ChangePowerState(BasePrimitive):
+LOG = log.getLogger(__name__)
+
+
+class Sleep(base.BaseAction):
+
+    @property
+    def duration(self):
+        return int(self.input_parameters.get('duration'))
 
-    @Promise
     def execute(self):
-        raise NotImplementedError  # pragma:no cover
+        LOG.debug("Starting action Sleep duration:%s ", self.duration)
+        time.sleep(self.duration)
+        return True
 
-    @Promise
-    def undo(self):
-        raise NotImplementedError  # pragma:no cover
+    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 +16,48 @@
 # 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.execution.executor import ActionPlanExecutor
-from watcher.objects import Action
-from watcher.objects import ActionPlan
+from watcher.applier import base
+from watcher.applier.workflow_engine.loading import default
+from watcher import objects
+
+LOG = log.getLogger(__name__)
+CONF = cfg.CONF
 
 
-class DefaultApplier(BaseApplier):
-    def __init__(self, manager_applier, context):
+class DefaultApplier(base.BaseApplier):
+    def __init__(self, applier_manager, context):
         super(DefaultApplier, self).__init__()
-        self.manager_applier = manager_applier
-        self.context = context
-        self.executor = ActionPlanExecutor(manager_applier, context)
+        self._applier_manager = applier_manager
+        self._loader = default.DefaultWorkFlowEngineLoader()
+        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)
+            self._engine.context = self.context
+            self._engine.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})
-        return self.executor.execute(actions)
+        filters = {'action_plan_id': action_plan.id}
+        actions = objects.Action.dbapi.get_action_list(self.context, filters)
+        return self.engine.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

@@ -16,20 +16,24 @@
 # 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.common.messaging.messaging_core import MessagingCore
+from watcher.applier.messaging import trigger
+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',
+               default='1',
+               min=1,
+               required=True,
+               help='Number of workers for applier, default value is 1.'),
     cfg.StrOpt('topic_control',
                default='watcher.applier.control',
                help='The topic name used for'
@@ -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',
@@ -55,7 +63,7 @@ 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,
@@ -63,10 +71,7 @@ class ApplierManager(MessagingCore):
             CONF.watcher_applier.topic_status,
             api_version=self.API_VERSION,
         )
-        # shared executor of the workflow
-        self.executor = ThreadPoolExecutor(max_workers=1)
-        # trigger action_plan
-        self.topic_control.add_endpoint(TriggerActionPlan(self))
+        self.topic_control.add_endpoint(trigger.TriggerActionPlan(self))
 
     def join(self):
         self.topic_control.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):
-        self.manager_applier = manager_applier
+    def __init__(self, applier_manager):
+        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,
-                                           self.manager_applier,
-                                           action_plan_uuid)
+            cmd = default.DefaultActionPlanHandler(context,
+                                                   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,
-                                             context,
-                                             action_plan_uuid)
+        self.executor.submit(self.do_launch_action_plan, context,
+                             action_plan_uuid)
         return action_plan_uuid

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/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.notification_handler import NotificationHandler
+from watcher.common.messaging import messaging_core
+from watcher.common.messaging import notification_handler as notification
 from watcher.common import utils
 
 
@@ -34,7 +34,7 @@ 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__(
@@ -43,7 +43,7 @@ class ApplierAPI(MessagingCore):
             CONF.watcher_applier.topic_status,
             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)
         transport = om.get_transport(CONF)

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.messaging.events import event
+from watcher import objects
+
+
+@six.add_metaclass(abc.ABCMeta)
+class BaseWorkFlowEngine(object):
+    def __init__(self):
+        self._applier_manager = None
+        self._context = None
+        self._action_factory = factory.ActionFactory()
+
+    @property
+    def context(self):
+        return self._context
+
+    @context.setter
+    def context(self, c):
+        self._context = c
+
+    @property
+    def applier_manager(self):
+        return self._applier_manager
+
+    @applier_manager.setter
+    def applier_manager(self, a):
+        self._applier_manager = a
+
+    @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.topic_status.publish_event(ev.type.name,
+                                                        payload)
+
+    @abc.abstractmethod
+    def execute(self, actions):
+        raise NotImplementedError()

watcher/applier/workflow_engine/default.py

@@ -0,0 +1,159 @@
+# -*- 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.objects import action as obj_action
+
+LOG = log.getLogger(__name__)
+
+
+class DefaultWorkFlowEngine(base.BaseWorkFlowEngine):
+    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()
+            return True
+        except Exception as e:
+            LOG.exception(e)
+            return False
+
+
+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)
+            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)
+
+            # todo(jed) remove return (true or false) raise an Exception
+            result = self.action.execute()
+            if result is not True:
+                self.engine.notify(self._db_action,
+                                   obj_action.State.FAILED)
+            else:
+                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/common/ceilometer.py

@@ -49,12 +49,12 @@ class CeilometerClient(object):
         This query can be then used for querying resources, meters and
         statistics.
         :Parameters:
-          - `user_id`: user_id, has a priority over list of ids
-          - `tenant_id`: tenant_id, has a priority over list of ids
-          - `resource_id`: resource_id, has a priority over list of ids
-          - `user_ids`: list of user_ids
-          - `tenant_ids`: list of tenant_ids
-          - `resource_ids`: list of resource_ids
+        - `user_id`: user_id, has a priority over list of ids
+        - `tenant_id`: tenant_id, has a priority over list of ids
+        - `resource_id`: resource_id, has a priority over list of ids
+        - `user_ids`: list of user_ids
+        - `tenant_ids`: list of tenant_ids
+        - `resource_ids`: list of resource_ids
         """
 
         user_ids = user_ids or []

watcher/common/exception.py

@@ -40,20 +40,15 @@ CONF = cfg.CONF
 CONF.register_opts(exc_log_opts)
 
 
-def _cleanse_dict(original):
-    """Strip all admin_password, new_pass, rescue_pass keys from a dict"""
-    return dict((k, v) for k, v in six.iteritems(original) if "_pass" not in k)
-
-
 class WatcherException(Exception):
     """Base Watcher Exception
 
     To correctly use this class, inherit from it and define
-    a 'message' property. That message will get printf'd
+    a 'msg_fmt' property. That msg_fmt will get printf'd
     with the keyword arguments provided to the constructor.
 
     """
-    message = _("An unknown exception occurred")
+    msg_fmt = _("An unknown exception occurred")
     code = 500
     headers = {}
     safe = False
@@ -69,20 +64,19 @@ class WatcherException(Exception):
 
         if not message:
             try:
-                message = self.message % kwargs
-
+                message = self.msg_fmt % kwargs
             except Exception as e:
-                # kwargs doesn't match a variable in the message
+                # kwargs doesn't match a variable in msg_fmt
                 # log the issue and the kwargs
                 LOG.exception(_LE('Exception in string format operation'))
-                for name, value in six.iteritems(kwargs):
+                for name, value in kwargs.items():
                     LOG.error("%s: %s", name, value)
 
                 if CONF.fatal_exception_format_errors:
                     raise e
                 else:
-                    # at least get the core message out if something happened
-                    message = self.message
+                    # at least get the core msg_fmt out if something happened
+                    message = self.msg_fmt
 
         super(WatcherException, self).__init__(message)
 
@@ -94,7 +88,7 @@ class WatcherException(Exception):
             return self.args[0]
 
     def __unicode__(self):
-        return self.message
+        return unicode(self.args[0])
 
     def format_message(self):
         if self.__class__.__name__.endswith('_Remote'):
@@ -104,114 +98,114 @@ class WatcherException(Exception):
 
 
 class NotAuthorized(WatcherException):
-    message = _("Not authorized")
+    msg_fmt = _("Not authorized")
     code = 403
 
 
 class OperationNotPermitted(NotAuthorized):
-    message = _("Operation not permitted")
+    msg_fmt = _("Operation not permitted")
 
 
 class Invalid(WatcherException):
-    message = _("Unacceptable parameters")
+    msg_fmt = _("Unacceptable parameters")
     code = 400
 
 
 class ObjectNotFound(WatcherException):
-    message = _("The %(name)s %(id)s could not be found")
+    msg_fmt = _("The %(name)s %(id)s could not be found")
 
 
 class Conflict(WatcherException):
-    message = _('Conflict')
+    msg_fmt = _('Conflict')
     code = 409
 
 
 class ResourceNotFound(ObjectNotFound):
-    message = _("The %(name)s resource %(id)s could not be found")
+    msg_fmt = _("The %(name)s resource %(id)s could not be found")
     code = 404
 
 
 class InvalidIdentity(Invalid):
-    message = _("Expected an uuid or int but received %(identity)s")
+    msg_fmt = _("Expected an uuid or int but received %(identity)s")
 
 
 class InvalidGoal(Invalid):
-    message = _("Goal %(goal)s is not defined in Watcher configuration file")
+    msg_fmt = _("Goal %(goal)s is not defined in Watcher configuration file")
 
 
 # Cannot be templated as the error syntax varies.
 # msg needs to be constructed when raised.
 class InvalidParameterValue(Invalid):
-    message = _("%(err)s")
+    msg_fmt = _("%(err)s")
 
 
 class InvalidUUID(Invalid):
-    message = _("Expected a uuid but received %(uuid)s")
+    msg_fmt = _("Expected a uuid but received %(uuid)s")
 
 
 class InvalidName(Invalid):
-    message = _("Expected a logical name but received %(name)s")
+    msg_fmt = _("Expected a logical name but received %(name)s")
 
 
 class InvalidUuidOrName(Invalid):
-    message = _("Expected a logical name or uuid but received %(name)s")
+    msg_fmt = _("Expected a logical name or uuid but received %(name)s")
 
 
 class AuditTemplateNotFound(ResourceNotFound):
-    message = _("AuditTemplate %(audit_template)s could not be found")
+    msg_fmt = _("AuditTemplate %(audit_template)s could not be found")
 
 
 class AuditTemplateAlreadyExists(Conflict):
-    message = _("An audit_template with UUID %(uuid)s or name %(name)s "
+    msg_fmt = _("An audit_template with UUID %(uuid)s or name %(name)s "
                 "already exists")
 
 
 class AuditTemplateReferenced(Invalid):
-    message = _("AuditTemplate %(audit_template)s is referenced by one or "
+    msg_fmt = _("AuditTemplate %(audit_template)s is referenced by one or "
                 "multiple audit")
 
 
 class AuditNotFound(ResourceNotFound):
-    message = _("Audit %(audit)s could not be found")
+    msg_fmt = _("Audit %(audit)s could not be found")
 
 
 class AuditAlreadyExists(Conflict):
-    message = _("An audit with UUID %(uuid)s already exists")
+    msg_fmt = _("An audit with UUID %(uuid)s already exists")
 
 
 class AuditReferenced(Invalid):
-    message = _("Audit %(audit)s is referenced by one or multiple action "
+    msg_fmt = _("Audit %(audit)s is referenced by one or multiple action "
                 "plans")
 
 
 class ActionPlanNotFound(ResourceNotFound):
-    message = _("ActionPlan %(action plan)s could not be found")
+    msg_fmt = _("ActionPlan %(action plan)s could not be found")
 
 
 class ActionPlanAlreadyExists(Conflict):
-    message = _("An action plan with UUID %(uuid)s already exists")
+    msg_fmt = _("An action plan with UUID %(uuid)s already exists")
 
 
 class ActionPlanReferenced(Invalid):
-    message = _("Action Plan %(action_plan)s is referenced by one or "
+    msg_fmt = _("Action Plan %(action_plan)s is referenced by one or "
                 "multiple actions")
 
 
 class ActionNotFound(ResourceNotFound):
-    message = _("Action %(action)s could not be found")
+    msg_fmt = _("Action %(action)s could not be found")
 
 
 class ActionAlreadyExists(Conflict):
-    message = _("An action with UUID %(uuid)s already exists")
+    msg_fmt = _("An action with UUID %(uuid)s already exists")
 
 
 class ActionReferenced(Invalid):
-    message = _("Action plan %(action_plan)s is referenced by one or "
+    msg_fmt = _("Action plan %(action_plan)s is referenced by one or "
                 "multiple goals")
 
 
 class ActionFilterCombinationProhibited(Invalid):
-    message = _("Filtering actions on both audit and action-plan is "
+    msg_fmt = _("Filtering actions on both audit and action-plan is "
                 "prohibited")
 
 
@@ -220,84 +214,49 @@ class HTTPNotFound(ResourceNotFound):
 
 
 class PatchError(Invalid):
-    message = _("Couldn't apply patch '%(patch)s'. Reason: %(reason)s")
+    msg_fmt = _("Couldn't apply patch '%(patch)s'. Reason: %(reason)s")
 
 
 # decision engine
 
 
-class BaseException(Exception):
-
-    def __init__(self, desc=""):
-        if (not isinstance(desc, six.string_types)):
-            raise ValueError(_("Description must be an instance of str"))
-
-        desc = desc.strip()
-
-        self._desc = desc
-
-    def get_description(self):
-        return self._desc
-
-    def get_message(self):
-        return _("An exception occurred without a description")
-
-    def __str__(self):
-        return self.get_message()
+class IllegalArgumentException(WatcherException):
+    msg_fmt = _('Illegal argument')
 
 
-class IllegalArgumentException(BaseException):
-    def __init__(self, desc):
-        desc = desc or _("Description cannot be empty")
-        super(IllegalArgumentException, self).__init__(desc)
-
-    def get_message(self):
-        return self._desc
+class NoSuchMetric(WatcherException):
+    msg_fmt = _('No such metric')
 
 
-class NoSuchMetric(BaseException):
-    def __init__(self, desc):
-        desc = desc or _("No such metric")
-        super(NoSuchMetric, self).__init__(desc)
-
-    def get_message(self):
-        return self._desc
-
-
-class NoDataFound(BaseException):
-    def __init__(self, desc):
-        desc = desc or _("No rows were returned")
-        super(NoDataFound, self).__init__(desc)
-
-    def get_message(self):
-        return self._desc
+class NoDataFound(WatcherException):
+    msg_fmt = _('No rows were returned')
 
 
 class KeystoneFailure(WatcherException):
-    message = _("'Keystone API endpoint is missing''")
+    msg_fmt = _("'Keystone API endpoint is missing''")
 
 
 class ClusterEmpty(WatcherException):
-    message = _("The list of hypervisor(s) in the cluster is empty")
+    msg_fmt = _("The list of hypervisor(s) in the cluster is empty")
 
 
 class MetricCollectorNotDefined(WatcherException):
-    message = _("The metrics resource collector is not defined")
+    msg_fmt = _("The metrics resource collector is not defined")
 
 
 class ClusterStateNotDefined(WatcherException):
-    message = _("the cluster state is not defined")
+    msg_fmt = _("the cluster state is not defined")
 
 
 # Model
 
-class VMNotFound(WatcherException):
-    message = _("The VM could not be found")
+class InstanceNotFound(WatcherException):
+    msg_fmt = _("The instance '%(name)s' is not found")
 
 
 class HypervisorNotFound(WatcherException):
-    message = _("The hypervisor could not be found")
+    msg_fmt = _("The hypervisor is not found")
 
 
-class MetaActionNotFound(WatcherException):
-    message = _("The Meta-Action could not be found")
+class LoadingError(WatcherException):
+    msg_fmt = _("Error loading plugin '%(name)s'")

watcher/common/loader/base.py

@@ -1,13 +1,11 @@
 # -*- 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
+#    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,
@@ -15,20 +13,20 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-#
+
+from __future__ import unicode_literals
+
 import abc
 import six
-from watcher.applier.promise import Promise
 
 
 @six.add_metaclass(abc.ABCMeta)
-class BasePrimitive(object):
-    @Promise
+class BaseLoader(object):
+
     @abc.abstractmethod
-    def execute(self):
+    def list_available(self):
         raise NotImplementedError()
 
-    @Promise
     @abc.abstractmethod
-    def undo(self):
+    def load(self, name):
         raise NotImplementedError()

watcher/common/loader/default.py

@@ -0,0 +1,48 @@
+# -*- 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 stevedore.driver import DriverManager
+from stevedore import ExtensionManager
+
+from watcher.common import exception
+from watcher.common.loader.base import BaseLoader
+
+LOG = log.getLogger(__name__)
+
+
+class DefaultLoader(BaseLoader):
+    def __init__(self, namespace):
+        super(DefaultLoader, self).__init__()
+        self.namespace = namespace
+
+    def load(self, name):
+        try:
+            LOG.debug("Loading in namespace %s => %s ", self.namespace, name)
+            driver_manager = DriverManager(namespace=self.namespace,
+                                           name=name)
+            loaded = driver_manager.driver
+        except Exception as exc:
+            LOG.exception(exc)
+            raise exception.LoadingError(name=name)
+
+        return loaded()
+
+    def list_available(self):
+        extension_manager = ExtensionManager(namespace=self.namespace)
+        return {ext.name: ext.plugin for ext in extension_manager.extensions}

watcher/common/messaging/messaging_handler.py

@@ -94,7 +94,7 @@ class MessagingHandler(threading.Thread):
                 )
                 self.__server = self.build_server(target)
             else:
-                LOG.warn(
+                LOG.warning(
                     _LW("No endpoint defined; can only publish events"))
         except Exception as e:
             LOG.exception(e)

watcher/common/nova.py

@@ -76,9 +76,9 @@ class NovaClient(object):
 
         :param instance_id: the unique id of the instance to migrate.
         :param keep_original_image_name: flag indicating whether the
-        image name from which the original instance was built must be
-        used as the name of the intermediate image used for migration.
-        If this flag is False, a temporary image name is built
+            image name from which the original instance was built must be
+            used as the name of the intermediate image used for migration.
+            If this flag is False, a temporary image name is built
         """
 
         new_image_name = ""
@@ -328,7 +328,7 @@ class NovaClient(object):
         return False
 
     def live_migrate_instance(self, instance_id, dest_hostname,
-                              block_migration=True, retry=120):
+                              block_migration=False, retry=120):
         """This method does a live migration of a given instance
 
         This method uses the Nova built-in live_migrate()
@@ -438,13 +438,13 @@ class NovaClient(object):
 
         It waits for this image to be in 'active' state before returning.
         It returns the unique UUID of the created image if successful,
-        None otherwise
+        None otherwise.
 
         :param instance_id: the uniqueid of
-        the instance to backup as an image.
+            the instance to backup as an image.
         :param image_name: the name of the image to create.
         :param metadata: a dictionary containing the list of
-        key-value pairs to associate to the image as metadata.
+            key-value pairs to associate to the image as metadata.
         """
         if self.glance is None:
             glance_endpoint = self.keystone. \
@@ -568,7 +568,7 @@ class NovaClient(object):
 
         :param instance: instance object.
         :param status_list: tuple containing the list of
-        status we are waiting for
+            status we are waiting for
         :param retry: how many times to retry
         :param sleep: seconds to sleep between the retries
         """

watcher/common/utils.py

@@ -50,8 +50,9 @@ def safe_rstrip(value, chars=None):
 
     """
     if not isinstance(value, six.string_types):
-        LOG.warn(_LW("Failed to remove trailing character. Returning original "
-                     "object. Supplied object is not a string: %s,"), value)
+        LOG.warning(_LW(
+            "Failed to remove trailing character. Returning original object."
+            "Supplied object is not a string: %s,"), value)
         return value
 
     return value.rstrip(chars) or value

watcher/contrib/tempest/tempest/api/infra_optim/README.rst

@@ -1,31 +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/
-
-Tempest Field Guide to Infrastructure Optimization API tests
-============================================================
-
-
-What are these tests?
----------------------
-
-These tests stress the OpenStack Infrastructure Optimization API provided by
-Watcher.
-
-
-Why are these tests in tempest?
-------------------------------
-
-The purpose of these tests is to exercise the various APIs provided by Watcher
-for optimizing the infrastructure.
-
-
-Scope of these tests
---------------------
-
-The Infrastructure Optimization API test perform basic CRUD operations on the Watcher node
-inventory.  They do not actually perform placement or migration of virtual resources. It is important
-to note that all Watcher API actions are admin operations meant to be used
-either by cloud operators.

watcher/contrib/tempest/tempest/api/infra_optim/admin/base.py

@@ -1,130 +0,0 @@
-#    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 functools
-
-from tempest_lib.common.utils import data_utils
-from tempest_lib import exceptions as lib_exc
-
-from tempest import clients_infra_optim as clients
-from tempest.common import credentials
-from tempest import config
-from tempest import test
-
-CONF = config.CONF
-
-
-# Resources must be deleted in a specific order, this list
-# defines the resource types to clean up, and the correct order.
-RESOURCE_TYPES = ['audit_template']
-# RESOURCE_TYPES = ['action', 'action_plan', 'audit', 'audit_template']
-
-
-def creates(resource):
-    """Decorator that adds resources to the appropriate cleanup list."""
-
-    def decorator(f):
-        @functools.wraps(f)
-        def wrapper(cls, *args, **kwargs):
-            resp, body = f(cls, *args, **kwargs)
-
-            if 'uuid' in body:
-                cls.created_objects[resource].add(body['uuid'])
-
-            return resp, body
-        return wrapper
-    return decorator
-
-
-class BaseInfraOptimTest(test.BaseTestCase):
-    """Base class for Infrastructure Optimization API tests."""
-
-    @classmethod
-    # def skip_checks(cls):
-    #     super(BaseInfraOptimTest, cls).skip_checks()
-    #     if not CONF.service_available.watcher:
-    #         skip_msg = \
-    #             ('%s skipped as Watcher is not available' % cls.__name__)
-    #         raise cls.skipException(skip_msg)
-    @classmethod
-    def setup_credentials(cls):
-        super(BaseInfraOptimTest, cls).setup_credentials()
-        if (not hasattr(cls, 'isolated_creds') or
-                not cls.isolated_creds.name == cls.__name__):
-            cls.isolated_creds = credentials.get_isolated_credentials(
-                name=cls.__name__, network_resources=cls.network_resources)
-        cls.mgr = clients.Manager(cls.isolated_creds.get_admin_creds())
-
-    @classmethod
-    def setup_clients(cls):
-        super(BaseInfraOptimTest, cls).setup_clients()
-        cls.client = cls.mgr.io_client
-
-    @classmethod
-    def resource_setup(cls):
-        super(BaseInfraOptimTest, cls).resource_setup()
-
-        cls.created_objects = {}
-        for resource in RESOURCE_TYPES:
-            cls.created_objects[resource] = set()
-
-    @classmethod
-    def resource_cleanup(cls):
-        """Ensure that all created objects get destroyed."""
-
-        try:
-            for resource in RESOURCE_TYPES:
-                uuids = cls.created_objects[resource]
-                delete_method = getattr(cls.client, 'delete_%s' % resource)
-                for u in uuids:
-                    delete_method(u, ignore_errors=lib_exc.NotFound)
-        finally:
-            super(BaseInfraOptimTest, cls).resource_cleanup()
-
-    @classmethod
-    @creates('audit_template')
-    def create_audit_template(cls, description=None, expect_errors=False):
-        """Wrapper utility for creating test audit_template.
-
-        :param description: A description of the audit template.
-            if not supplied, a random value will be generated.
-        :return: Created audit template.
-        """
-
-        description = description or data_utils.rand_name(
-            'test-audit_template')
-        resp, body = cls.client.create_audit_template(description=description)
-        return resp, body
-
-    @classmethod
-    def delete_audit_template(cls, audit_template_id):
-        """Deletes a audit_template having the specified UUID.
-
-        :param uuid: The unique identifier of the audit_template.
-        :return: Server response.
-        """
-
-        resp, body = cls.client.delete_audit_template(audit_template_id)
-
-        if audit_template_id in cls.created_objects['audit_template']:
-            cls.created_objects['audit_template'].remove(audit_template_id)
-
-        return resp
-
-    def validate_self_link(self, resource, uuid, link):
-        """Check whether the given self link formatted correctly."""
-        expected_link = "{base}/{pref}/{res}/{uuid}".format(
-                        base=self.client.base_url,
-                        pref=self.client.uri_prefix,
-                        res=resource,
-                        uuid=uuid)
-        self.assertEqual(expected_link, link)

watcher/contrib/tempest/tempest/cli/README.rst

@@ -1,56 +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/
-
-.. _cli_field_guide:
-
-Tempest Field Guide to CLI tests
-================================
-
-
-What are these tests?
----------------------
-The cli tests test the various OpenStack command line interface tools
-to ensure that they minimally function. The current scope is read only
-operations on a cloud that are hard to test via unit tests.
-
-
-Why are these tests in tempest?
--------------------------------
-These tests exist here because it is extremely difficult to build a
-functional enough environment in the python-\*client unit tests to
-provide this kind of testing. Because we already put up a cloud in the
-gate with devstack + tempest it was decided it was better to have
-these as a side tree in tempest instead of another QA effort which
-would split review time.
-
-
-Scope of these tests
---------------------
-This should stay limited to the scope of testing the cli. Functional
-testing of the cloud should be elsewhere, this is about exercising the
-cli code.
-
-
-Example of a good test
-----------------------
-Tests should be isolated to a single command in one of the python
-clients.
-
-Tests should not modify the cloud.
-
-If a test is validating the cli for bad data, it should do it with
-assertRaises.
-
-A reasonable example of an existing test is as follows::
-
-    def test_admin_list(self):
-        self.nova('list')
-        self.nova('list', params='--all-tenants 1')
-        self.nova('list', params='--all-tenants 0')
-        self.assertRaises(subprocess.CalledProcessError,
-                          self.nova,
-                          'list',
-                          params='--all-tenants bad')

watcher/contrib/tempest/tempest/cli/__init__.py

@@ -1,126 +0,0 @@
-# Copyright 2013 OpenStack Foundation
-# All Rights Reserved.
-#
-#    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 functools
-
-from tempest_lib.cli import base
-from tempest_lib.cli import output_parser
-import testtools
-
-from tempest.common import credentials
-from tempest import config
-from tempest import exceptions
-from tempest.openstack.common import versionutils
-from tempest import test
-
-
-CONF = config.CONF
-
-
-def check_client_version(client, version):
-    """Checks if the client's version is compatible with the given version
-
-    @param client: The client to check.
-    @param version: The version to compare against.
-    @return: True if the client version is compatible with the given version
-             parameter, False otherwise.
-    """
-    current_version = base.execute(client, '', params='--version',
-                                   merge_stderr=True, cli_dir=CONF.cli.cli_dir)
-
-    if not current_version.strip():
-        raise exceptions.TempestException('"%s --version" output was empty' %
-                                          client)
-
-    return versionutils.is_compatible(version, current_version,
-                                      same_major=False)
-
-
-def min_client_version(*args, **kwargs):
-    """A decorator to skip tests if the client used isn't of the right version.
-
-    @param client: The client command to run. For python-novaclient, this is
-                   'nova', for python-cinderclient this is 'cinder', etc.
-    @param version: The minimum version required to run the CLI test.
-    """
-    def decorator(func):
-        @functools.wraps(func)
-        def wrapper(*func_args, **func_kwargs):
-            if not check_client_version(kwargs['client'], kwargs['version']):
-                msg = "requires %s client version >= %s" % (kwargs['client'],
-                                                            kwargs['version'])
-                raise testtools.TestCase.skipException(msg)
-            return func(*func_args, **func_kwargs)
-        return wrapper
-    return decorator
-
-
-class ClientTestBase(test.BaseTestCase):
-
-    @classmethod
-    def skip_checks(cls):
-        super(ClientTestBase, cls).skip_checks()
-        if not CONF.identity_feature_enabled.api_v2:
-            raise cls.skipException("CLI clients rely on identity v2 API, "
-                                    "which is configured as not available")
-
-    @classmethod
-    def resource_setup(cls):
-        if not CONF.cli.enabled:
-            msg = "cli testing disabled"
-            raise cls.skipException(msg)
-        super(ClientTestBase, cls).resource_setup()
-        cls.isolated_creds = credentials.get_isolated_credentials(cls.__name__)
-        cls.creds = cls.isolated_creds.get_admin_creds()
-
-    def _get_clients(self):
-        clients = base.CLIClient(self.creds.username,
-                                 self.creds.password,
-                                 self.creds.tenant_name,
-                                 CONF.identity.uri, CONF.cli.cli_dir)
-        return clients
-
-    # TODO(mtreinish): The following code is basically copied from tempest-lib.
-    # The base cli test class in tempest-lib 0.0.1 doesn't work as a mixin like
-    # is needed here. The code below should be removed when tempest-lib
-    # provides a way to provide this functionality
-    def setUp(self):
-        super(ClientTestBase, self).setUp()
-        self.clients = self._get_clients()
-        self.parser = output_parser
-
-    def assertTableStruct(self, items, field_names):
-        """Verify that all items has keys listed in field_names.
-
-        :param items: items to assert are field names in the output table
-        :type items: list
-        :param field_names: field names from the output table of the cmd
-        :type field_names: list
-        """
-        for item in items:
-            for field in field_names:
-                self.assertIn(field, item)
-
-    def assertFirstLineStartsWith(self, lines, beginning):
-        """Verify that the first line starts with a string
-
-        :param lines: strings for each line of output
-        :type lines: list
-        :param beginning: verify this is at the beginning of the first line
-        :type beginning: string
-        """
-        self.assertTrue(lines[0].startswith(beginning),
-                        msg=('Beginning of first line has invalid content: %s'
-                             % lines[:3]))

watcher/contrib/tempest/tempest/cli/simple_read_only/README.txt

@@ -1 +0,0 @@
-This directory consists of simple read only python client tests.

watcher/contrib/tempest/tempest/cli/simple_read_only/infra-optim/test_watcher.py

@@ -1,220 +0,0 @@
-# Copyright 2013 OpenStack Foundation
-# All Rights Reserved.
-#
-#    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 logging
-import re
-
-from tempest_lib import exceptions
-import testtools
-
-from tempest import cli
-from tempest import clients
-from tempest import config
-from tempest import test
-
-
-CONF = config.CONF
-LOG = logging.getLogger(__name__)
-
-
-class SimpleReadOnlyCinderClientTest(cli.ClientTestBase):
-    """Basic, read-only tests for Cinder CLI client.
-
-    Checks return values and output of read-only commands.
-    These tests do not presume any content, nor do they create
-    their own. They only verify the structure of output if present.
-    """
-
-    @classmethod
-    def resource_setup(cls):
-        # if not CONF.service_available.cinder:
-        #     msg = ("%s skipped as Cinder is not available" % cls.__name__)
-        #     raise cls.skipException(msg)
-        super(SimpleReadOnlyCinderClientTest, cls).resource_setup()
-        id_cl = clients.AdminManager().identity_client
-        tenant = id_cl.get_tenant_by_name(CONF.identity.admin_tenant_name)
-        cls.admin_tenant_id = tenant['id']
-
-    def cinder(self, *args, **kwargs):
-        return self.clients.cinder(*args,
-                                   endpoint_type=CONF.volume.endpoint_type,
-                                   **kwargs)
-
-    @test.idempotent_id('229bc6dc-d804-4668-b753-b590caf63061')
-    def test_cinder_fake_action(self):
-        self.assertRaises(exceptions.CommandFailed,
-                          self.cinder,
-                          'this-does-not-exist')
-
-    @test.idempotent_id('77140216-14db-4fc5-a246-e2a587e9e99b')
-    def test_cinder_absolute_limit_list(self):
-        roles = self.parser.listing(self.cinder('absolute-limits'))
-        self.assertTableStruct(roles, ['Name', 'Value'])
-
-    @test.idempotent_id('2206b9ce-1a36-4a0a-a129-e5afc7cee1dd')
-    def test_cinder_backup_list(self):
-        backup_list = self.parser.listing(self.cinder('backup-list'))
-        self.assertTableStruct(backup_list, ['ID', 'Volume ID', 'Status',
-                                             'Name', 'Size', 'Object Count',
-                                             'Container'])
-
-    @test.idempotent_id('c7f50346-cd99-4e0b-953f-796ff5f47295')
-    def test_cinder_extra_specs_list(self):
-        extra_specs_list = self.parser.listing(self.cinder('extra-specs-list'))
-        self.assertTableStruct(extra_specs_list, ['ID', 'Name', 'extra_specs'])
-
-    @test.idempotent_id('9de694cb-b40b-442c-a30c-5f9873e144f7')
-    def test_cinder_volumes_list(self):
-        list = self.parser.listing(self.cinder('list'))
-        self.assertTableStruct(list, ['ID', 'Status', 'Name', 'Size',
-                                      'Volume Type', 'Bootable',
-                                      'Attached to'])
-        self.cinder('list', params='--all-tenants 1')
-        self.cinder('list', params='--all-tenants 0')
-        self.assertRaises(exceptions.CommandFailed,
-                          self.cinder,
-                          'list',
-                          params='--all-tenants bad')
-
-    @test.idempotent_id('56f7c15c-ee82-4f23-bbe8-ce99b66da493')
-    def test_cinder_quota_class_show(self):
-        """This CLI can accept and string as param."""
-        roles = self.parser.listing(self.cinder('quota-class-show',
-                                                params='abc'))
-        self.assertTableStruct(roles, ['Property', 'Value'])
-
-    @test.idempotent_id('a919a811-b7f0-47a7-b4e5-f3eb674dd200')
-    def test_cinder_quota_defaults(self):
-        """This CLI can accept and string as param."""
-        roles = self.parser.listing(self.cinder('quota-defaults',
-                                                params=self.admin_tenant_id))
-        self.assertTableStruct(roles, ['Property', 'Value'])
-
-    @test.idempotent_id('18166673-ffa8-4df3-b60c-6375532288bc')
-    def test_cinder_quota_show(self):
-        """This CLI can accept and string as param."""
-        roles = self.parser.listing(self.cinder('quota-show',
-                                                params=self.admin_tenant_id))
-        self.assertTableStruct(roles, ['Property', 'Value'])
-
-    @test.idempotent_id('b2c66ed9-ca96-4dc4-94cc-8083e664e516')
-    def test_cinder_rate_limits(self):
-        rate_limits = self.parser.listing(self.cinder('rate-limits'))
-        self.assertTableStruct(rate_limits, ['Verb', 'URI', 'Value', 'Remain',
-                                             'Unit', 'Next_Available'])
-
-    @test.idempotent_id('7a19955b-807c-481a-a2ee-9d76733eac28')
-    @testtools.skipUnless(CONF.volume_feature_enabled.snapshot,
-                          'Volume snapshot not available.')
-    def test_cinder_snapshot_list(self):
-        snapshot_list = self.parser.listing(self.cinder('snapshot-list'))
-        self.assertTableStruct(snapshot_list, ['ID', 'Volume ID', 'Status',
-                                               'Name', 'Size'])
-
-    @test.idempotent_id('6e54ecd9-7ba9-490d-8e3b-294b67139e73')
-    def test_cinder_type_list(self):
-        type_list = self.parser.listing(self.cinder('type-list'))
-        self.assertTableStruct(type_list, ['ID', 'Name'])
-
-    @test.idempotent_id('2c363583-24a0-4980-b9cb-b50c0d241e82')
-    def test_cinder_list_extensions(self):
-        roles = self.parser.listing(self.cinder('list-extensions'))
-        self.assertTableStruct(roles, ['Name', 'Summary', 'Alias', 'Updated'])
-
-    @test.idempotent_id('691bd6df-30ad-4be7-927b-a02d62aaa38a')
-    def test_cinder_credentials(self):
-        credentials = self.parser.listing(self.cinder('credentials'))
-        self.assertTableStruct(credentials, ['User Credentials', 'Value'])
-
-    @test.idempotent_id('5c6d71a3-4904-4a3a-aec9-7fd4aa830e95')
-    def test_cinder_availability_zone_list(self):
-        zone_list = self.parser.listing(self.cinder('availability-zone-list'))
-        self.assertTableStruct(zone_list, ['Name', 'Status'])
-
-    @test.idempotent_id('9b0fd5a6-f955-42b9-a42f-6f542a80b9a3')
-    def test_cinder_endpoints(self):
-        out = self.cinder('endpoints')
-        tables = self.parser.tables(out)
-        for table in tables:
-            headers = table['headers']
-            self.assertTrue(2 >= len(headers))
-            self.assertEqual('Value', headers[1])
-
-    @test.idempotent_id('301b5ae1-9591-4e9f-999c-d525a9bdf822')
-    def test_cinder_service_list(self):
-        service_list = self.parser.listing(self.cinder('service-list'))
-        self.assertTableStruct(service_list, ['Binary', 'Host', 'Zone',
-                                              'Status', 'State', 'Updated_at'])
-
-    @test.idempotent_id('7260ae52-b462-461e-9048-36d0bccf92c6')
-    def test_cinder_transfer_list(self):
-        transfer_list = self.parser.listing(self.cinder('transfer-list'))
-        self.assertTableStruct(transfer_list, ['ID', 'Volume ID', 'Name'])
-
-    @test.idempotent_id('0976dea8-14f3-45a9-8495-3617fc4fbb13')
-    def test_cinder_bash_completion(self):
-        self.cinder('bash-completion')
-
-    @test.idempotent_id('b7c00361-be80-4512-8735-5f98fc54f2a9')
-    def test_cinder_qos_list(self):
-        qos_list = self.parser.listing(self.cinder('qos-list'))
-        self.assertTableStruct(qos_list, ['ID', 'Name', 'Consumer', 'specs'])
-
-    @test.idempotent_id('2e92dc6e-22b5-4d94-abfc-b543b0c50a89')
-    def test_cinder_encryption_type_list(self):
-        encrypt_list = self.parser.listing(self.cinder('encryption-type-list'))
-        self.assertTableStruct(encrypt_list, ['Volume Type ID', 'Provider',
-                                              'Cipher', 'Key Size',
-                                              'Control Location'])
-
-    @test.idempotent_id('0ee6cb4c-8de6-4811-a7be-7f4bb75b80cc')
-    def test_admin_help(self):
-        help_text = self.cinder('help')
-        lines = help_text.split('\n')
-        self.assertFirstLineStartsWith(lines, 'usage: cinder')
-
-        commands = []
-        cmds_start = lines.index('Positional arguments:')
-        cmds_end = lines.index('Optional arguments:')
-        command_pattern = re.compile('^ {4}([a-z0-9\-\_]+)')
-        for line in lines[cmds_start:cmds_end]:
-            match = command_pattern.match(line)
-            if match:
-                commands.append(match.group(1))
-        commands = set(commands)
-        wanted_commands = set(('absolute-limits', 'list', 'help',
-                               'quota-show', 'type-list', 'snapshot-list'))
-        self.assertFalse(wanted_commands - commands)
-
-    # Optional arguments:
-
-    @test.idempotent_id('2fd6f530-183c-4bda-8918-1e59e36c26b9')
-    def test_cinder_version(self):
-        self.cinder('', flags='--version')
-
-    @test.idempotent_id('306bac51-c443-4426-a6cf-583a953fcd68')
-    def test_cinder_debug_list(self):
-        self.cinder('list', flags='--debug')
-
-    @test.idempotent_id('6d97fcd2-5dd1-429d-af70-030c949d86cd')
-    def test_cinder_retries_list(self):
-        self.cinder('list', flags='--retries 3')
-
-    @test.idempotent_id('95a2850c-35b4-4159-bb93-51647a5ad232')
-    def test_cinder_region_list(self):
-        region = CONF.volume.region
-        if not region:
-            region = CONF.identity.region
-        self.cinder('list', flags='--os-region-name ' + region)

watcher/contrib/tempest/tempest/clients_infra_optim.py

@@ -1,42 +0,0 @@
-# Copyright 2014 Mirantis Inc.
-# All Rights Reserved.
-#
-#    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 tempest import clients
-from tempest.common import cred_provider
-from tempest import config
-from tempest.services.infra_optim.v1.json import infra_optim_client as ioc
-
-CONF = config.CONF
-
-
-class Manager(clients.Manager):
-    def __init__(self, credentials=None, service=None):
-        super(Manager, self).__init__(credentials, service)
-        self.io_client = ioc.InfraOptimClientJSON(self.auth_provider,
-                                                  'infra-optim',
-                                                  CONF.identity.region)
-
-
-class AltManager(Manager):
-    def __init__(self, service=None):
-        super(AltManager, self).__init__(
-            cred_provider.get_configured_credentials('alt_user'), service)
-
-
-class AdminManager(Manager):
-    def __init__(self, service=None):
-        super(AdminManager, self).__init__(
-            cred_provider.get_configured_credentials('identity_admin'),
-            service)

watcher/contrib/tempest/tempest/config_infra_optim.py

@@ -1,45 +0,0 @@
-# Copyright 2014 Mirantis Inc.
-# All Rights Reserved.
-#
-#    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 print_function
-
-from oslo_config import cfg
-
-from tempest import config  # noqa
-
-service_available_group = cfg.OptGroup(name="service_available",
-                                       title="Available OpenStack Services")
-
-ServiceAvailableGroup = [
-    cfg.BoolOpt("watcher",
-                default=True,
-                help="Whether or not watcher is expected to be available"),
-]
-
-
-class TempestConfigProxyWatcher(object):
-    """Wrapper over standard Tempest config that sets Watcher opts."""
-
-    def __init__(self):
-        self._config = config.CONF
-        config.register_opt_group(
-            cfg.CONF, service_available_group, ServiceAvailableGroup)
-        self._config.share = cfg.CONF.share
-
-    def __getattr__(self, attr):
-        return getattr(self._config, attr)
-
-
-CONF = TempestConfigProxyWatcher()