upload-images.yml

# This playbook requires `mc` the minio client (not to be confused
# with `mc` the terminal file manager.
---
- hosts: localhost
  gather_facts: false

  vars_files:
    - images.yml

  vars:
    mc_alias: moc

  tasks:
    # This should also trigger failure if `mc` is not the
    # `mc` we expect.
    - name: ensure the mc configuration is correct
      command: >-
        mc --quiet alias ls {{ mc_alias }}
      changed_when: false

    - name: ensure cache directory exists
      file:
        path: ./cache
        state: directory

    - name: check if target image exists
      command: >-
        mc stat {{ mc_alias }}/images/{{ item.name }}
      loop: "{{ images }}"
      register: image_check
      failed_when: false
      changed_when: image_check.rc != 0

    - name: check if we have a new source_url
      command: >-
        mc tag list "{{ mc_alias }}/images/{{ image.name }}" --json
      register: url_check
      failed_when: false
      changed_when: >-
        (url_check.stdout|from_json).tagset is not defined or
        (url_check.stdout|from_json).tagset.source_url != image.url
      when: item is not changed
      vars:
        image: "{{ item.item }}"
      loop: "{{ image_check.results }}"
      loop_control:
        label: "{{ image }}"

    - name: download image to local cache
      get_url:
        url: "{{ image.url }}"
        dest: "./cache/{{ image.url|hash('sha256') }}"
      vars:
        image: "{{ item.0.item }}"
      when: item.0 is changed or item.1 is changed
      loop: "{{ image_check.results|zip(url_check.results)|list }}"
      loop_control:
        label: "{{ image }}"

    - name: upload image to registry
      command: >-
        mc cp ./cache/{{ image.url|hash('sha256') }}
        {{ mc_alias }}/images/{{ image.name }}
      vars:
        image: "{{ item.0.item }}"
      when: item.0 is changed or item.1 is changed
      loop: "{{ image_check.results|zip(url_check.results)|list }}"
      loop_control:
        label: "{{ image }}"

    - name: set image tags
      tags: [tag]
      command: >-
        mc tag set moc/images/{{ image.name }} "source_url={{ image.url }}"
      vars:
        image: "{{ item.0.item }}"
      when: item.0 is changed or item.1 is changed
      loop: "{{ image_check.results|zip(url_check.results)|list }}"
      loop_control:
        label: "{{ image }}"