Old entries in recipient_canonical_maps/sender_canonical_maps/aliases are not cleaned up

[adborden]

If I run the playbook with:

recipient_canonical_maps:
  - recipient: root
  - rewrite: me@example.com

Then I run the playbook with:

recipient_canonical_maps:
  - recipient: postmaster
  - rewrite: me@example.com

And then I inspect /etc/postfix/recipient_canonical_maps

$ cat /etc/postfix/recipient_canonical_maps
root me@example.com
postmaster me@example.com

[racke]

That's indeed a problem. Using the lineinfile module is not appropriate here. copy with content parameter or template would work better. Also both of these are more efficient for a larger number of entries in the list.

[racke]

For example:

- name: configure recipient canonical maps
  copy:
    dest: "{{ postfix_recipient_canonical_maps_file }}"
    content: |
      {% for item in postfix_recipient_canonical_maps %}
      {{ item.recipient }} {{ item.rewrite }}
      {% endfor %}
    owner: root
    group: root
    mode: 0644

Disadvantage: leaves an empty line in the file when the value is an empty array.

[tersmitten]

@racke Maybe add a when: postfix_recipient_canonical_maps | lenght

[racke]

I thought about that, but if we do that it is still possible that we get stale entries from previous runs. I think it should be possible to use the same template for all of these tasks (instead of using copy).

[tersmitten]

I guess I prefer a template too

[GarrisonD]

I faced this today but with ..._generic_maps 😢
I couldn't understand where the issue was for quite some time.

lineinfile-based implementation for stuff like this (with user-provided keys) gives more cons than pros.

[racke]

Definitely ... and the performance will suffer for a large number of entries.

[tersmitten]

Feel free to create a PR