ansible.builtin.pipe lookup – read output from a command

Note

This lookup plugin is part of ansible-core and included in all Ansible installations. In most cases, you can use the short plugin name pipe even without specifying the collections: keyword. However, we recommend you use the FQCN for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same lookup plugin name.

New in version 0.9: of ansible.builtin

Synopsis

  • Run a command and return the output.

Parameters

Parameter

Comments

_terms

string / required

command(s) to run.

Notes

Note

  • Like all lookups this runs on the Ansible controller and is unaffected by other keywords, such as become, so if you need to different permissions you must change the command or run Ansible as another user.

  • Alternatively you can use a shell/command task that runs against localhost and registers the result.

  • Pipe lookup internally invokes Popen with shell=True (this is required and intentional). This type of invocation is considered as security issue if appropriate care is not taken to sanitize any user provided or variable input. It is strongly recommended to pass user input or variable input via quote filter before using with pipe lookup. See example section for this. Read more about this Bandit B602 docs

Examples

- name: raw result of running date command"
  ansible.builtin.debug:
    msg: "{{ lookup('ansible.builtin.pipe', 'date') }}"

- name: Always use quote filter to make sure your variables are safe to use with shell
  ansible.builtin.debug:
    msg: "{{ lookup('ansible.builtin.pipe', 'getent passwd ' + myuser | quote ) }}"

Return Values

Common return values are documented here, the following are the fields unique to this lookup:

Key

Description

_string

list / elements=string

stdout from command

Returned: success

Authors

  • Daniel Hokka Zakrisson

Hint

Configuration entries for each entry type have a low to high priority order. For example, a variable that is lower in the list will override a variable that is higher up.