c12s-kubespray/roles/download/tasks/prep_download.yml

---
- name: prep_download | Set a few facts
  set_fact:
    download_force_cache: "{{ true if download_run_once else download_force_cache }}"
  tags:
    - facts

# The docker image_info_command might seems weird but we are using raw/endraw and `{{ `{{` }}` to manage the double jinja2 processing
# done here and when `image_info_command` is used (first the raw/endraw allow to store the command, then the second processing replace `{{`
- name: prep_download | Set image pull/info command for docker
  set_fact:
    image_pull_command: "{{ docker_bin_dir }}/docker pull"
    image_info_command: "{{ docker_bin_dir }}/docker images -q | xargs -i {{ '{{' }} docker_bin_dir }}/docker inspect -f {% raw %}'{{ '{{' }} if .RepoTags }}{{ '{{' }} join .RepoTags \",\" }}{{ '{{' }} end }}{{ '{{' }} if .RepoDigests }},{{ '{{' }} join .RepoDigests \",\" }}{{ '{{' }} end }}' {% endraw %} {} | tr '\n' ','"
  when: container_manager == 'docker'

- name: prep_download | Set image pull/info command for containerd
  set_fact:
    image_info_command: "{{ bin_dir }}/nerdctl -n k8s.io images --format '{% raw %}{{ '{{' }} .Repository {{ '}}' }}:{{ '{{' }} .Tag {{ '}}' }}{% endraw %}' 2>/dev/null | grep -v ^:$ | tr '\n' ','"
    image_pull_command: "{{ bin_dir }}/nerdctl -n k8s.io pull --quiet{{ nerdctl_extra_flags }}"
  when: container_manager == 'containerd'

- name: prep_download | Set image pull/info command for crio
  set_fact:
    image_info_command: "{{ bin_dir }}/crictl images --verbose | awk -F ': ' '/RepoTags|RepoDigests/ {print $2}' | tr '\n' ','"
    image_pull_command: "{{ bin_dir }}/crictl pull"
  when: container_manager == 'crio'

- name: prep_download | Set image pull/info command for docker on localhost
  set_fact:
    image_pull_command_on_localhost: "{{ docker_bin_dir }}/docker pull"
    image_info_command_on_localhost: "{{ docker_bin_dir }}/docker images"
  when: container_manager_on_localhost == 'docker'

- name: prep_download | Set image pull/info command for containerd on localhost
  set_fact:
    image_info_command_on_localhost: "{{ bin_dir }}/nerdctl -n k8s.io images --format '{% raw %}{{ '{{' }} .Repository {{ '}}' }}:{{ '{{' }} .Tag {{ '}}' }}{% endraw %}' 2>/dev/null | grep -v ^:$ | tr '\n' ','"
    image_pull_command_on_localhost: "{{ bin_dir }}/nerdctl -n k8s.io pull --quiet{{ nerdctl_extra_flags }}"
  when: container_manager_on_localhost == 'containerd'

- name: prep_download | Set image pull/info command for crio on localhost
  set_fact:
    image_info_command_on_localhost: "{{ bin_dir }}/crictl images --verbose | awk -F ': ' '/RepoTags|RepoDigests/ {print $2}' | tr '\n' ','"
    image_pull_command_on_localhost: "{{ bin_dir }}/crictl pull"
  when: container_manager_on_localhost == 'crio'

- name: prep_download | On localhost, check if passwordless root is possible
  command: "true"
  delegate_to: localhost
  connection: local
  run_once: true
  register: test_become
  changed_when: false
  ignore_errors: true  # noqa ignore-errors
  become: true
  when:
    - download_localhost
  tags:
    - localhost
    - asserts

- name: prep_download | On localhost, check if user has access to the container runtime without using sudo
  shell: "{{ image_info_command_on_localhost }}"  # noqa 305 image_info_command_on_localhost contains pipe, therefore requires shell
  delegate_to: localhost
  connection: local
  run_once: true
  register: test_docker
  changed_when: false
  ignore_errors: true  # noqa ignore-errors
  become: false
  when:
    - download_localhost
  tags:
    - localhost
    - asserts

- name: prep_download | Parse the outputs of the previous commands
  set_fact:
    user_in_docker_group: "{{ not test_docker.failed }}"
    user_can_become_root: "{{ not test_become.failed }}"
  when:
    - download_localhost
  tags:
    - localhost
    - asserts

- name: prep_download | Check that local user is in group or can become root
  assert:
    that: "user_in_docker_group or user_can_become_root"
    msg: >-
      Error: User is not in docker group and cannot become root. When download_localhost is true, at least one of these two conditions must be met.      
  when:
    - download_localhost
  tags:
    - localhost
    - asserts

- name: prep_download | Register docker images info
  shell: "{{ image_info_command }}"  # noqa 305 image_info_command contains pipe therefore requires shell
  no_log: true
  register: docker_images
  failed_when: false
  changed_when: false
  check_mode: no
  when: download_container

- name: prep_download | Create staging directory on remote node
  file:
    path: "{{ local_release_dir }}/images"
    state: directory
    recurse: yes
    mode: 0755
    owner: "{{ ansible_ssh_user | default(ansible_user_id) }}"
  when:
    - ansible_os_family not in ["Flatcar", "Flatcar Container Linux by Kinvolk"]

- name: prep_download | Create local cache for files and images on control node
  file:
    path: "{{ download_cache_dir }}/images"
    state: directory
    recurse: yes
    mode: 0755
  delegate_to: localhost
  connection: local
  delegate_facts: no
  run_once: true
  become: false
  when:
    - download_force_cache
  tags:
    - localhost