.. _strategy_plugins:
Strategy Plugins
================
.. contents ::
:local:
:depth: 2
Strategy plugins control the flow of play execution by handling task and host scheduling.
.. _enable_strategy:
Enabling strategy plugins
-------------------------
All strategy plugins shipped with Ansible are enabled by default. You can enable a custom strategy plugin by
putting it in one of the lookup directory sources configured in :ref: `ansible.cfg <ansible_configuration_settings>` .
.. _using_strategy:
Using strategy plugins
----------------------
Only one strategy plugin can be used in a play, but you can use different ones for each play in a playbook or ansible run.
The default is the :ref: `linear <linear_strategy>` plugin. You can change this default in Ansible :ref: `configuration <ansible_configuration_settings>` using an environment variable:
.. code-block :: shell
export ANSIBLE_STRATEGY=free
or in the `ansible.cfg`
.. code-block :: ini
[defaults]
strategy=linear
You can also specify the strategy plugin in the play via the :ref: `strategy keyword <playbook_keywords>` in a play::
- hosts: all
strategy: debug
tasks:
- copy: src=myhosts dest=/etc/hosts
notify: restart_tomcat
- package: name=tomcat state=present
handlers:
- name: restart_tomcat
service: name=tomcat state=restarted
.. _strategy_plugin_list:
Plugin list
-----------
You can use `` ansible-doc -t strategy -l `` to see the list of available plugins.
Use `` ansible-doc -t strategy <plugin name> `` to see plugin-specific specific documentation and examples.
.. seealso ::
:ref: `about_playbooks`
An introduction to playbooks
:ref: `inventory_plugins`
Ansible inventory plugins
:ref: `callback_plugins`
Ansible callback plugins
:ref: `playbooks_filters`
Jinja2 filter plugins
:ref: `playbooks_tests`
Jinja2 test plugins
:ref: `playbooks_lookups`
Jinja2 lookup plugins
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