kubespray/roles/download/tasks/download_container.yml

---
- block:
    - name: set default values for flag variables
      set_fact:
        image_is_cached: false
        image_changed: false
        pull_required: "{{ download_always_pull }}"
      tags:
        - facts

    - name: download_container | Set a few facts
      import_tasks: set_container_facts.yml
      tags:
        - facts

    - name: download_container | Prepare container download
      include_tasks: check_pull_required.yml
      when:
        - not download_always_pull

    - debug:
        msg: "Pull {{ image_reponame }} required is: {{ pull_required }}"

    - name: download_container | Determine if image is in cache
      stat:
        path: "{{ image_path_cached }}"
      delegate_to: localhost
      delegate_facts: no
      register: cache_image
      changed_when: false
      become: false
      when:
        - download_force_cache

    - name: download_container | Set fact indicating if image is in cache
      set_fact:
        image_is_cached: "{{ cache_image.stat.exists }}"
      tags:
        - facts
      when:
        - download_force_cache

    - name: Stop if image not in cache on ansible host when download_force_cache=true
      assert:
        that: image_is_cached
        msg: "Image cache file {{ image_path_cached }} not found for {{ image_reponame }} on localhost"
      when:
        - download_force_cache
        - not download_run_once

    - name: download_container | Download image if required
      command: "{{ image_pull_command_on_localhost if download_localhost else image_pull_command }} {{ image_reponame }}"
      delegate_to: "{{ download_delegate if download_run_once else inventory_hostname }}"
      delegate_facts: yes
      run_once: "{{ download_run_once }}"
      register: pull_task_result
      until: pull_task_result is succeeded
      delay: "{{ retry_stagger | random + 3 }}"
      retries: 4
      become: "{{ user_can_become_root | default(false) or not download_localhost }}"
      when:
        - pull_required
        - not image_is_cached

    - name: download_container | Save and compress image
      shell: "{{ image_save_command_on_localhost if download_localhost else image_save_command }}"
      delegate_to: "{{ download_delegate }}"
      delegate_facts: no
      register: container_save_status
      failed_when: container_save_status.stderr
      run_once: true
      become: "{{ user_can_become_root | default(false) or not download_localhost }}"
      when:
        - not image_is_cached
        - download_run_once

    - name: download_container | Copy image to ansible host cache
      synchronize:
        src: "{{ image_path_final }}"
        dest: "{{ image_path_cached }}"
        use_ssh_args: "{{ has_bastion | default(false) }}"
        mode: pull
      when:
        - not image_is_cached
        - download_run_once
        - not download_localhost
        - download_delegate == inventory_hostname

    - name: download_container | Upload image to node if it is cached
      synchronize:
        src: "{{ image_path_cached }}"
        dest: "{{ image_path_final }}"
        use_ssh_args: "{{ has_bastion | default(false) }}"
        mode: push
      delegate_facts: no
      register: upload_image
      failed_when: not upload_image
      until: upload_image is succeeded
      retries: 4
      delay: "{{ retry_stagger | random + 3 }}"
      when:
        - pull_required
        - download_force_cache

    - name: download_container | Load image into docker
      shell: "{{ image_load_command }}"
      register: container_load_status
      failed_when: container_load_status is failed
      when:
        - pull_required
        - download_force_cache

    - name: download_container | Remove container image from cache
      file:
        state: absent
        path: "{{ image_path_final }}"
      when:
        - not download_keep_remote_cache
  tags:
    - download