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community.general/docs/docsite/rst/reference_appendices/special_variables.rst
Matt Martz 9007dbec2f
Add info about loop based on jinja2 loop var (#42134)
* Add info about loop based on jinja2 loop var

* ansible_loop

* Update test count

* Add extended loop_control that defines whether ansible_loop should be added

* Extended needs to be defaulted

* Revert "Update test count"

This reverts commit f1e93ee469825f4cdcd90fb28667d29aa088275c.

* Add docs about loop_control.extended

* Add revindex and revindex0

* Document ansible_loop in special vars

* Add changelog fragment

* Add tests, change items to allitems so that dot notation works, fix logic error with previtem
2018-12-07 13:49:50 -06:00

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.. _special_variables:
Special Variables
=================
Magic
-----
These variables cannot be set directly by the user; Ansible will always override them to reflect internal state.
ansible_check_mode
Boolean that indicates if we are in check mode or not
ansible_dependent_role_names
The names of the roles currently imported into the current play as dependencies of other plays
ansible_diff_mode
Boolean that indicates if we are in diff mode or not
ansible_forks
Integer reflecting the number of maximum forks available to this run
ansible_inventory_sources
List of sources used as inventory
ansible_limit
Contents of the ``--limit`` CLI option for the current execution of Ansible
ansible_loop
A dictionary/map containing extended loop information when enabled via ``loop_control.extended``
ansible_play_batch
List of active hosts in the current play run limited by the serial, aka 'batch'. Failed/Unreachable hosts are not considered 'active'.
ansible_play_hosts
The same as ansible_play_batch
ansible_play_hosts_all
List of all the hosts that were targeted by the play
ansible_play_role_names
The names of the roles currently imported into the current play. This list does **not** contain the role names that are
implicitly included via dependencies.
ansible_playbook_python
The path to the python interpreter being used by Ansible on the controller
ansible_role_names
The names of the roles currently imported into the current play, or roles referenced as dependencies of the roles
imported into the current play.
ansible_run_tags
Contents of the ``--tags`` CLI option, which specifies which tags will be included for the current run.
ansible_search_path
Current search path for action plugins and lookups, i.e where we search for relative paths when you do ``template: src=myfile``
ansible_skip_tags
Contents of the ``--skip_tags`` CLI option, which specifies which tags will be skipped for the current run.
ansible_verbosity
Current verbosity setting for Ansible
ansible_version
Dictionary/map that contains information about the current running version of ansible, it has the following keys: full, major, minor, revision and string.
group_names
List of groups the current host is part of
groups
A dictionary/map with all the groups in inventory and each group has the list of hosts that belong to it
hostvars
A dictionary/map with all the hosts in inventory and variables assigned to them
inventory_hostname
The inventory name for the 'current' host being iterated over in the play
inventory_hostname_short
The short version of `inventory_hostname`
inventory_dir
The directory of the inventory source in which the `inventory_hostname` was first defined
inventory_file
The file name of the inventory source in which the `inventory_hostname` was first defined
omit
Special variable that allows you to 'omit' an option in a task, i.e ``- user: name=bob home={{ bobs_home|default(omit) }}``
play_hosts
Deprecated, the same as ansible_play_batch
ansible_play_name
The name of the currently executed play. Added in ``2.8``.
playbook_dir
The path to the directory of the playbook that was passed to the ``ansible-playbook`` command line.
role_name
The name of the currently executed role
role_names
Deprecated, the same as ansible_play_role_names
role_path
The path to the dir of the currently running role
Facts
-----
These are variables that contain information pertinent to the current host (`inventory_hostname`). They are only available if gathered first.
ansible_facts
Contains any facts gathered or cached for the `inventory_hostname`
Facts are normally gathered by the :ref:`setup <setup_module>` module automatically in a play, but any module can return facts.
ansible_local
Contains any 'local facts' gathered or cached for the `inventory_hostname`.
The keys available depend on the custom facts created.
See the :ref:`setup <setup_module>` module for more details.
Connection variables
---------------------
Connection variables are normally used to set the specifics on how to execute actions on a target. Most of them correspond to connection plugins, but not all are specific to them; other plugins like shell, terminal and become are normally involved.
Only the common ones are described as each connection/become/shell/etc plugin can define its own overrides and specific variables.
ansible_become_user
The user Ansible 'becomes' after using privilege escalation. This must be available to the 'login user'.
ansible_connecion
The connection plugin actually used for the task on the target host.
ansible_host
The ip/name of the target host to use instead of `inventory_hostname`.
ansible_python_interpreter
The path to the Python executable Ansible should use on the target host.
ansible_user
The user Ansible 'logs in' as.