community.docker/tests/integration/targets/setup_docker/tasks/main.yml

---
####################################################################
# WARNING: These are designed specifically for Ansible tests       #
# and should not be used as examples of how to write Ansible roles #
####################################################################

- name: Setup Docker
  when: ansible_facts.distribution ~ ansible_facts.distribution_major_version not in  ['CentOS6', 'RedHat6']
  block:
    - name: Detect whether we are running inside a container
      current_container_facts:

    - name: Look for marker whether Docker was already set up
      stat:
        path: /root/community.docker-docker-is-set-up
      register: docker_setup_marker

    - when: not docker_setup_marker.stat.exists
      block:
        - name: Determine whether Docker Daemon needs to be installed
          set_fact:
            needs_docker_daemon: '{{ not ansible_module_running_in_container }}'

        - name: Include distribution specific variables
          include_vars: "{{ lookup('first_found', params) }}"
          vars:
            params:
              files:
                - "{{ ansible_facts.distribution }}-{{ ansible_facts.distribution_major_version }}.yml"
                - "{{ ansible_facts.os_family }}-{{ ansible_facts.distribution_major_version }}.yml"
                - "{{ ansible_facts.distribution }}.yml"
                - "{{ ansible_facts.os_family }}.yml"
                - default.yml
              paths:
                - "{{ role_path }}/vars"

        - name: Include distribution specific tasks
          include_tasks: "{{ lookup('first_found', params) }}"
          vars:
            params:
              files:
                - "{{ ansible_facts.distribution }}-{{ ansible_facts.distribution_major_version }}.yml"
                - "{{ ansible_facts.os_family }}-{{ ansible_facts.distribution_major_version }}.yml"
                - "{{ ansible_facts.distribution }}.yml"
                - "{{ ansible_facts.os_family }}.yml"
              paths:
                - "{{ role_path }}/tasks"

        - name: Make sure that docker is running
          service:
            name: docker
            state: started
          when: not ansible_module_running_in_container

        - name: Set marker that Docker was already set up
          file:
            path: /root/community.docker-docker-is-set-up
            state: touch
          when: docker_skip_cleanup

    # Detect docker API version
    - name: Check Docker API version
      command: "docker version -f {% raw %}'{{(index .Server.Components 0).Details.ApiVersion}}'{% endraw %}"
      register: docker_api_version_stdout
      ignore_errors: yes

    # Detect docker CLI version
    - name: Check Docker CLI version
      command: "docker version -f {% raw %}'{{.Client.Version}}'{% endraw %}"
      register: docker_cli_version_stdout
      ignore_errors: yes

    - set_fact:
        docker_cli_version: "{{ docker_cli_version_stdout.stdout | default('0.0') }}"
        docker_api_version: "{{ docker_api_version_stdout.stdout | default('0.0') }}"

    - debug:
        msg: "Docker CLI version: {{ docker_cli_version }}; Docker API version: {{ docker_api_version }}"

    - block:
      # Cleanup docker daemon
      - command: 'docker ps --no-trunc --format {% raw %}"{{.Names}}"{% endraw %}'

      - name: "Remove all ansible-docker-test-* docker containers"
        shell: 'docker ps --no-trunc --format {% raw %}"{{.Names}}"{% endraw %} | grep "^ansible-docker-test-" | xargs -r docker rm -f'
        register: docker_containers
        retries: 3
        delay: 3
        until: docker_containers is success
        ignore_errors: yes

      - name: "Remove all ansible-docker-test-* docker volumes"
        shell: 'docker volume ls --format {% raw %}"{{.Name}}"{% endraw %} | grep "^ansible-docker-test-" | xargs -r docker volume rm -f'
        register: docker_volumes
        ignore_errors: yes

      - name: "Remove all ansible-docker-test-* docker networks"
        shell: 'docker network ls --no-trunc --format {% raw %}"{{.Name}}"{% endraw %} | grep "^ansible-docker-test-" | xargs -r docker network rm'
        register: docker_networks
        ignore_errors: yes

      - name: Cleaned docker resources
        debug:
          var: docker_resources
        vars:
          docker_resources:
            containers: "{{ docker_containers.stdout_lines | default([]) }}"
            volumes: "{{ docker_volumes.stdout_lines | default([]) }}"
            networks: "{{ docker_networks.stdout_lines | default([]) }}"

      # List all existing docker resources
      - name: List all docker containers
        command: docker ps --no-trunc -a
        register: docker_containers
        ignore_errors: yes

      - name: List all docker volumes
        command: docker volume ls
        register: docker_volumes
        ignore_errors: yes

      - name: List all docker networks
        command: docker network ls --no-trunc
        register: docker_networks
        ignore_errors: yes

      - name: List all docker images
        command: docker images --no-trunc -a
        register: docker_images
        ignore_errors: yes

      - name: Still existing docker resources
        debug:
          var: docker_resources
        vars:
          docker_resources:
            containers: "{{ docker_containers.stdout_lines | default([]) }}"
            volumes: "{{ docker_volumes.stdout_lines | default([]) }}"
            networks: "{{ docker_networks.stdout_lines | default([]) }}"
            images: "{{ docker_images.stdout_lines | default([]) }}"

      when: docker_cli_version is version('0.0', '>')