Ansible: insert a single word on an existing line in a file

Question

I have to use Ansible modules in order to edit the /etc/ssh/sshd_config file - every time I create a new user I want to append it at these two lines:

AllowUs         


        

Answer 1

I had the same problem. I needed add user to sudoers group, let's say 'testuser' to line:

User_Alias SOMEADMIN = smoeuser1, someuser2, someuser3

This worked well for me:

- name: add testuser to end of line
      lineinfile:
        dest: /etc/sudoers.d/somegroup
        state: present
        regexp: '^(User_Alias(.*)$)'
        backrefs: yes
        line: '\1, testuser'

The point is that if I had '^User_Alias(..)$'* in regexp and not '^(User_Alias(..)$)'* it didn't work and whole line was replaced. With () arround searched text the result was OK:

User_Alias SOMEADMIN = smoeuser1, someuser2, someuser3, testuser

So then anything can work in line:, included ansible variables like "{{ usernames | join(', ') }}"