kubespray/roles/download/tasks/sync_container.yml

---
- name: container_download | Make download decision if pull is required by tag or sha256
  include: set_docker_image_facts.yml
  delegate_to: "{{ download_delegate if download_run_once or omit }}"
  delegate_facts: no
  run_once: "{{ download_run_once }}"
  when:
    - download.enabled
    - download.container
  tags:
    - facts

- set_fact:
    fname: "{{local_release_dir}}/containers/{{download.repo|regex_replace('/|\0|:', '_')}}:{{download.tag|default(download.sha256)|regex_replace('/|\0|:', '_')}}.tar"
  run_once: true
  when:
    - download.enabled
    - download.container
    - download_run_once
  tags:
    - facts

- name: "container_download | Set default value for 'container_changed' to false"
  set_fact:
    container_changed: "{{pull_required|default(false)}}"
  when:
    - download.enabled
    - download.container
    - download_run_once

- name: "container_download | Update the 'container_changed' fact"
  set_fact:
    container_changed: "{{ pull_required|default(false) or not 'up to date' in pull_task_result.stdout }}"
  when:
    - download.enabled
    - download.container
    - download_run_once
    - pull_required|default(download_always_pull)
  run_once: "{{ download_run_once }}"
  tags:
    - facts

- name: container_download | Stat saved container image
  stat:
    path: "{{fname}}"
  register: img
  changed_when: false
  delegate_to: "{{ download_delegate }}"
  delegate_facts: no
  become: false
  run_once: true
  when:
    - download.enabled
    - download.container
    - download_run_once
  tags:
    - facts

- name: container_download | save container images
  shell: "{{ docker_bin_dir }}/docker save {{ pull_args }} | gzip -{{ download_compress }} > {{ fname }}"
  delegate_to: "{{ download_delegate }}"
  delegate_facts: no
  register: saved
  run_once: true
  when:
    - download.enabled
    - download.container
    - download_run_once
    - (ansible_os_family not in ["CoreOS", "Container Linux by CoreOS"] or download_delegate == "localhost")
    - (container_changed or not img.stat.exists)

- name: container_download | copy container images to ansible host
  synchronize:
    src: "{{ fname }}"
    dest: "{{ fname }}"
    use_ssh_args: "{{ has_bastion | default(false) }}"
    mode: pull
  delegate_to: localhost
  delegate_facts: no
  run_once: true
  become: false
  when:
    - download.enabled
    - download.container
    - download_run_once
    - ansible_os_family not in ["CoreOS", "Container Linux by CoreOS"]
    - inventory_hostname == download_delegate
    - download_delegate != "localhost"
    - saved.changed

- name: container_download | upload container images to nodes
  synchronize:
    src: "{{ fname }}"
    dest: "{{ fname }}"
    use_ssh_args: "{{ has_bastion | default(false) }}"
    mode: push
  delegate_to: localhost
  delegate_facts: no
  become: false
  register: get_task
  until: get_task|succeeded
  retries: 4
  delay: "{{ retry_stagger | random + 3 }}"
  when:
    - download.enabled
    - download.container
    - download_run_once
    - (ansible_os_family not in ["CoreOS", "Container Linux by CoreOS"] and
      inventory_hostname != download_delegate or
      download_delegate == "localhost")
  tags:
    - upload
    - upgrade

- name: container_download | load container images
  shell: "{{ docker_bin_dir }}/docker load < {{ fname }}"
  when:
    - download.enabled
    - download.container
    - download_run_once
    - (ansible_os_family not in ["CoreOS", "Container Linux by CoreOS"] and
      inventory_hostname != download_delegate or download_delegate == "localhost")
  tags:
    - upload
    - upgrade