At 2013-08-13 20:33:12 -0400, [email protected] wrote:
>
> However, there's no way to run just *one* task in check mode, so it
> seems this is a feature request for check at task level.
>
> apt: ...
> check_mode: True
Hi.
I'm sorry it's taken so long, but here's a pull request that allows
individual tasks to be run in check mode:
https://github.com/ansible/ansible/pull/7439
The patch was written by my colleague Carlos Chapi (Cc:ed) and tested by
me (the original motivation for this feature was to find out if the apt
module would install certain packages, so as to take some extra actions
before and afterwards only if something's going to be installed).
For example (since the original context was so long ago):
- name: Check if Postgres needs to be installed
apt: name=postgresql-9.3 state=installed
check_mode: True
register: wouldinstall
- name: Suppress autostart with policy-rc.d
copy:
content="#!/bin/bash\nexit 101\n"
dest=/usr/sbin/policy-rc.d mode=0755
when: wouldinstall.changed
- name: Install Postgres
apt: name=postgresql-9.3 state=installed
when: wouldinstall.changed
register: install
- name: Remove policy-rc.d
file: path=/usr/sbin/policy-rc.d state=absent
when: install.changed
(My original proposal involved an "apt-wouldinstall" module, but Michael
suggested the much more sensible per-task check_mode setting.)
I can imagine many other "do x if y would happen" use-cases for this.
Thanks.
-- ams
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