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---
module: set_fact
short_description: Set host facts from a task
version_added: "1.2"
description:
- This module allows setting new variables.
- Variables are set on a host-by-host basis just like facts discovered by the setup module.
- These variables will be available to subsequent plays during an ansible-playbook run.
- Set C(cacheable) to C(yes) to save variables across executions
using a fact cache. Variables created with set_fact have different precedence depending on whether they are or are not cached.
- Per the standard Ansible variable precedence rules, many other types of variables have a higher priority, so this value may be overridden.
- This module is also supported for Windows targets.
options:
key_value:
description:
- The C(set_fact) module takes key=value pairs as variables to set
in the playbook scope. Or alternatively, accepts complex arguments
using the C(args:) statement.
required: true
cacheable:
description:
- This boolean converts the variable into an actual 'fact' which will also be added to the fact cache, if fact caching is enabled.
- Normally this module creates 'host level variables' and has much higher precedence, this option changes the nature and precedence
(by 7 steps) of the variable created.
https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable
- "This actually creates 2 copies of the variable, a normal 'set_fact' host variable with high precedence and
a lower 'ansible_fact' one that is available for persistance via the facts cache plugin.
This creates a possibly confusing interaction with C(meta: clear_facts) as it will remove the 'ansible_fact' but not the host variable."
type: bool
default: no
version_added: "2.4"
notes:
- "The C(var=value) notation can only create strings or booleans.
If you want to create lists/arrays or dictionary/hashes use C(var: [val1, val2])."
- Since 'cacheable' is now a module param, 'cacheable' is no longer a valid fact name as of Ansible 2.4.
- This module is also supported for Windows targets.
seealso:
- module: include_vars
- ref: ansible_variable_precedence
description: More information related to variable precedence and which type of variable wins over others.
author:
- Dag Wieers (@dagwieers)
sX
# Example setting host facts using key=value pairs, note that this always creates strings or booleans
- set_fact: one_fact="something" other_fact="{{ local_var }}"
# Example setting host facts using complex arguments
- set_fact:
one_fact: something
other_fact: "{{ local_var * 2 }}"
another_fact: "{{ some_registered_var.results | map(attribute='ansible_facts.some_fact') | list }}"
# Example setting facts so that they will be persisted in the fact cache
- set_fact:
one_fact: something
other_fact: "{{ local_var * 2 }}"
cacheable: yes
# As of Ansible 1.8, Ansible will convert boolean strings ('true', 'false', 'yes', 'no')
# to proper boolean values when using the key=value syntax, however it is still
# recommended that booleans be set using the complex argument style:
- set_fact:
one_fact: yes
other_fact: no
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