ansible#22579 workaround

ansible#22579 workaround.yml

---

### For details see https://github.com/ansible/ansible/issues/22579


### BEFORE

---
- name: Check freezer containers
  become: true
  kolla_docker:
    action: "compare_container"
    common_options: "{{ docker_common_options }}"
    name: "{{ item.value.container_name }}"
    image: "{{ item.value.image }}"
    volumes: "{{ item.value.volumes | reject('equalto', '') | list }}"
    dimensions: "{{ item.value.dimensions }}"
  when:
    - inventory_hostname in groups[item.value.group]
    - item.value.enabled | bool
  with_dict: "{{ freezer_services }}"
  notify:
    - "Restart {{ item.key }} container"


### AFTER (`notify` replaced by `register` and another task introduced)

---
- name: Check freezer containers
  become: true
  kolla_docker:
    action: "compare_container"
    common_options: "{{ docker_common_options }}"
    name: "{{ item.value.container_name }}"
    image: "{{ item.value.image }}"
    volumes: "{{ item.value.volumes | reject('equalto', '') | list }}"
    dimensions: "{{ item.value.dimensions }}"
  when:
    - inventory_hostname in groups[item.value.group]
    - item.value.enabled | bool
  with_dict: "{{ freezer_services }}"
  register: container_check

# NOTE(yoctozepto): Must be a separate task because one cannot see the whole
# result in the previous task and Ansible has a quirk regarding notifiers.
# For details see https://github.com/ansible/ansible/issues/22579
- name: Notify freezer containers for restart
  debug:
    msg: Ansible is quirky
  changed_when: container_check is changed
  notify: "{{ container_check.results | select('changed') | map(attribute='item') | map(attribute='key') | map('regex_replace', '^(.*)$', 'Restart \\1 container') | list }}"

I think you can to map(attribute='item.key')