mirror of https://github.com/ansible/ansible.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
1.8 KiB
ReStructuredText
32 lines
1.8 KiB
ReStructuredText
.. _implicit_localhost:
|
|
|
|
Implicit 'localhost'
|
|
====================
|
|
|
|
When you try to reference a ``localhost`` and you don't have it defined in inventory, Ansible will create an implicit one for you.::
|
|
|
|
- hosts: all
|
|
tasks:
|
|
- name: check that i have log file for all hosts on my local machine
|
|
stat: path=/var/log/hosts/{{inventory_hostname}}.log
|
|
delegate_to: localhost
|
|
|
|
In a case like this (or ``local_action``) when Ansible needs to contact a 'localhost' but you did not supply one, we create one for you. This host is defined with specific connection variables equivalent to this in an inventory::
|
|
|
|
...
|
|
|
|
hosts:
|
|
localhost:
|
|
vars:
|
|
ansible_connection: local
|
|
ansible_python_interpreter: "{{ansible_playbook_python}}"
|
|
|
|
This ensures that the proper connection and Python are used to execute your tasks locally.
|
|
You can override the built-in implicit version by creating a ``localhost`` host entry in your inventory. At that point, all implicit behaviors are ignored; the ``localhost`` in inventory is treated just like any other host. Group and host vars will apply, including connection vars, which includes the ``ansible_python_interpreter`` setting. This will also affect ``delegate_to: localhost`` and ``local_action``, the latter being an alias to the former.
|
|
|
|
.. note::
|
|
- This host is not targetable via any group, however it will use vars from ``host_vars`` and from the 'all' group.
|
|
- This implicit host also gets triggered by using ``127.0.0.1`` or ``::1`` as they are the IPv4 and IPv6 representations of 'localhost'.
|
|
- Even though there are many ways to create it, there will only ever be ONE implicit localhost, using the name first used to create it.
|
|
- Having ``connection: local`` does NOT trigger an implicit localhost, you are just changing the connection for the ``inventory_hostname``.
|