Support list style labels

[niwla23]

SUMMARY

Allow specifying labels as list like in docker-compose.

    - name: Create Traefik labels's dictionary
      ansible.builtin.set_fact:
        my_labels: "{{ my_labels | default({}) | combine ({ item.key : item.value }) }}"
      with_items:
        - { 'key': 'traefik.enable', 'value': 'true'}
        - { 'key': 'traefik.http.routers.{{ project_name }}.rule', 'value': 'Host(`{{ traefik_host }}`)'}
        - { 'key': 'traefik.http.routers.{{ project_name }}.tls.certresolver', 'value': 'le_main'}
        - { 'key': 'traefik.http.services.{{ project_name }}.loadbalancer.server.port', 'value': '80'}

ISSUE TYPE

• Feature Idea

COMPONENT NAME

community.docker.docker_container

ADDITIONAL INFORMATION

Allows to use templating in keys which is useful, e.g for traefik.

Example:
Currently this VERY ugly workaround has to be used:

    - name: Create app container
      community.docker.docker_container:
        name: "{{ project_name }}_app"
        image: "vaultwarden/server:1.25.1"
        labels:
          - "traefik.enable=true"
          - "traefik.http.routers.wekan.rule=Host(`{{ traefik_host }}`)"
          - "traefik.http.routers.wekan.entrypoints=web"
          - "traefik.http.routers.wekan.tls.certresolver=le_main"
          - "traefik.http.routers.wekan.entrypoints=websecure"

[felixfontein]

I'm not 100% sure how you prefer to provide the labels (list of dictionaries? list of strings?), but both ways can easily be converted to a dictionary:

- hosts: localhost
  gather_facts: false
  tasks:
    - debug:
        msg: "{{ labels_list | items2dict }}"
      vars:
        labels_list:
          - key: foo
            value: bar
          - key: 1
            value: 2
    - debug:
        msg: "{{ dict(labels_list | map('split', '=', 1)) }}"
      vars:
        labels_list:
          - foo=bar=baz
          - 1=2

Output:

PLAY [localhost] *************************************************************************************************

TASK [debug] *****************************************************************************************************
ok: [localhost] => {
    "msg": {
        "foo": "bar",
        "1": 2
    }
}

TASK [debug] *****************************************************************************************************
ok: [localhost] => {
    "msg": {
        "1": "2",
        "foo": "bar=baz"
    }
}

PLAY RECAP *******************************************************************************************************
localhost                  : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   

[niwla23]

@felixfontein Thanks, that already looks a lot better, but still a bit hacky IMO.