ansible/docs/docsite/rst/plugins/strategy.rst

Strategy Plugins

Strategy plugins control the flow of play execution by handling task and host scheduling.

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 ansible.cfg <ansible_configuration_settings>.

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 linear <linear_strategy> plugin. You can change this default in Ansible configuration <ansible_configuration_settings> using an environment variable:

export ANSIBLE_STRATEGY=free

or in the ansible.cfg file:

[defaults]
strategy=linear

You can also specify the strategy plugin in the play via the 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

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.

maxdepth

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strategy/*

about_playbooks

An introduction to playbooks

inventory_plugins

Ansible inventory plugins

callback_plugins

Ansible callback plugins

playbooks_filters

Jinja2 filter plugins

playbooks_tests

Jinja2 test plugins

playbooks_lookups

Jinja2 lookup plugins

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