Working around the ansible "python2 yum module is needed for this module" error


During a playbook run I was presented with the following error:

failed: [localhost] (item=[u'yum']) => {"failed": true, "item": ["yum"], "msg": "python2 yum module is needed for this module"}

The role that was executing had a task similar to the following:

- name: Install rsyslog packages
  yum: pkg={{item}} state=installed update_cache=false
  with_items:
    - rsyslog
  notify: Restart rsyslog service

The OS on the system I was trying to update was running Fedora 26 which uses the dnf package manager. Dnf is built on top of Python3 and Fedora 26 no longer includes the yum Python 2 bindings by default (if you want to use the ansible yum module you can create a task to install the yum package). Switching the task to use package instead of yum remedied this issue. Here is the updated task:

- name: Install rsyslog packages
  package: pkg={{item}} state=installed
  with_items:
    - rsyslog
  notify: Restart rsyslog service

The issue was easy to recognize after reading through the yum module source code. Posting this here in case it helps others.

This article was posted by Matty on 2017-09-27 15:59:00 -0400 EDT