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107 lines
3.6 KiB
ReStructuredText
107 lines
3.6 KiB
ReStructuredText
Ansible Modules
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===============
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.. contents::
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:depth: 2
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:backlinks: top
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Introduction
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````````````
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Ansible ships with a number of modules (called the 'module library')
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that can be executed directly on remote hosts or through :doc:`playbooks`.
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Users can also write their own modules. These modules can control system
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resources, like services, packages, or files (anything really), or
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handle executing system commands.
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Let's review how we execute three different modules from the command line::
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ansible webservers -m service -a "name=httpd state=running"
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ansible webservers -m ping
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ansible webservers -m command -a "/sbin/reboot -t now"
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Each module supports taking arguments. Nearly all modules take ``key=value``
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arguments, space delimited. Some modules take no arguments, and the
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command/shell modules simply take the string of the command you want to run.
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From playbooks, Ansible modules are executed in a very similar way::
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- name: reboot the servers
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action: command /sbin/reboot -t now
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All modules technically return JSON format data, though if you are using the
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command line or playbooks, you don't really need to know much about
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that. If you're writing your own module, you care, and this means you do
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not have to write modules in any particular language -- you get to choose.
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Modules are `idempotent`, meaning they will seek to avoid changes to the system unless a change needs to be made. When using Ansible
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playbooks, these modules can trigger 'change events' in the form of notifying 'handlers'
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to run additional tasks.
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Let's see what's available in the Ansible module library, out of the box:
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.. include:: modules/apt_repository.rst
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.. include:: modules/apt.rst
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.. include:: modules/assemble.rst
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.. include:: modules/authorized_key.rst
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.. include:: modules/command.rst
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.. include:: modules/copy.rst
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.. include:: modules/easy_install.rst
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.. include:: modules/facter.rst
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.. include:: modules/fetch.rst
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.. include:: modules/file.rst
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.. include:: modules/get_url.rst
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.. include:: modules/git.rst
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.. include:: modules/group.rst
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.. include:: modules/mount.rst
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.. include:: modules/mysql_db.rst
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.. include:: modules/mysql_user.rst
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.. include:: modules/nagios.rst
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.. include:: modules/ohai.rst
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.. include:: modules/ping.rst
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.. include:: modules/pip.rst
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.. include:: modules/postgresql_db.rst
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.. include:: modules/postgresql_user.rst
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.. include:: modules/raw.rst
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.. include:: modules/service.rst
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.. include:: modules/setup.rst
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.. include:: modules/shell.rst
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.. include:: modules/subversion.rst
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.. include:: modules/supervisorctl.rst
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.. include:: modules/template.rst
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.. include:: modules/user.rst
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.. include:: modules/virt.rst
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.. include:: modules/yum.rst
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Additional Contrib Modules
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``````````````````````````
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In addition to the following built-in modules, community modules are available at `Ansible Resources <http://github.com/ansible/ansible-resources>`_.
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Writing your own modules
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````````````````````````
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See :doc:`moduledev`.
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.. seealso::
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`Ansible Resources (Contrib) <https://github.com/ansible/ansible-resources>`_
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User contributed playbooks, modules, and articles
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:doc:`examples`
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Examples of using modules in /usr/bin/ansible
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:doc:`playbooks`
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Examples of using modules with /usr/bin/ansible-playbook
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:doc:`moduledev`
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How to write your own modules
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:doc:`api`
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Examples of using modules with the Python API
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`Mailing List <http://groups.google.com/group/ansible-project>`_
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Questions? Help? Ideas? Stop by the list on Google Groups
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`irc.freenode.net <http://irc.freenode.net>`_
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#ansible IRC chat channel
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