a4bbe7f893
Changed the header in the documentation to reflect that the docs are covered under the CCBY 3.0 license. Change-Id: I29f3f1a2491c28b1a4ee12a7b97a7ab00c919867 Closes-Bug: 1526331
122 lines
3.7 KiB
ReStructuredText
122 lines
3.7 KiB
ReStructuredText
..
|
|
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/
|
|
|
|
.. _user-guide:
|
|
|
|
=================================
|
|
Welcome to the Watcher User Guide
|
|
=================================
|
|
|
|
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.
|
|
|
|
|
|
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>`.
|
|
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:
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher help COMMAND
|
|
|
|
Seeing what the Watcher CLI can do ?
|
|
------------------------------------
|
|
We can see all of the commands available with Watcher CLI by running the
|
|
watcher binary without options.
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher
|
|
|
|
How do I run an audit of my cluster ?
|
|
-------------------------------------
|
|
|
|
First, you need to create an :ref:`audit template <audit_template_definition>`.
|
|
An :ref:`audit template <audit_template_definition>` defines an optimization
|
|
:ref:`goal <goal_definition>` to achieve (i.e. the settings of your audit).
|
|
This goal should be declared in the Watcher service configuration file
|
|
**/etc/watcher/watcher.conf**.
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher audit-template-create my_first_audit SERVERS_CONSOLIDATION
|
|
|
|
If you get "*You must provide a username via either --os-username or via
|
|
env[OS_USERNAME]*" you may have to verify your credentials.
|
|
|
|
Then, you can create an audit. An audit is a request for optimizing your
|
|
cluster depending on the specified :ref:`goal <goal_definition>`.
|
|
|
|
You can launch an audit on your cluster by referencing the
|
|
:ref:`audit template <audit_template_definition>` (i.e. the settings of your
|
|
audit) that you want to use.
|
|
|
|
- Get the :ref:`audit template <audit_template_definition>` UUID:
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher audit-template-list
|
|
|
|
- Start an audit based on this :ref:`audit template
|
|
<audit_template_definition>` settings:
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher audit-create -a <your_audit_template_uuid>
|
|
|
|
|
|
Watcher service will compute an :ref:`Action Plan <action_plan_definition>`
|
|
composed of a list of potential optimization :ref:`actions <action_definition>`
|
|
(instance migration, disabling of an hypervisor, ...) according to the
|
|
:ref:`goal <goal_definition>` to achieve. You can see all of the goals
|
|
available in section ``[watcher_strategies]`` of the Watcher service
|
|
configuration file.
|
|
|
|
- Wait until the Watcher audit has produced a new :ref:`action plan
|
|
<action_plan_definition>`, and get it:
|
|
|
|
.. code:: bash
|
|
|
|
$ 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>`:
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher action-list --action-plan <the_action_plan_uuid>
|
|
|
|
|
|
Once you have learned how to create an :ref:`Action Plan
|
|
<action_plan_definition>`, it's time to go further by applying it to your
|
|
cluster:
|
|
|
|
- Execute the :ref:`action plan <action_plan_definition>`:
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher action-plan-start <the_action_plan_uuid>
|
|
|
|
You can follow the states of the :ref:`actions <action_definition>` by
|
|
periodically calling:
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher action-list
|
|
|
|
You can also obtain more detailed information about a specific action:
|
|
|
|
.. code:: bash
|
|
|
|
$ watcher action-show <the_action_uuid>
|