geerlingguy.ansible-role-docker/molecule/default/verify.yml

---
- name: Verify Docker Role
  hosts: all
  tasks:
    - name: Verify Docker binary is available
      command: docker version
      register: docker_version_result
      changed_when: false
      failed_when: docker_version_result.rc != 0

    - name: Show Docker version details
      debug:
        msg: >
          Docker Version Output:
          {{ docker_version_result.stdout_lines | join('\n') }}          

    - name: Verify Docker service is running
      command: systemctl is-active docker
      register: docker_service_status
      when: ansible_service_mgr == 'systemd'
      changed_when: false
      failed_when: docker_service_status.stdout.strip() != "active"

    - name: Display Docker service status
      debug:
        msg: "Docker service is {{ docker_service_status.stdout.strip() }}"
      when: ansible_service_mgr == 'systemd'

    - name: Pull the 'hello-world' image
      command: docker pull hello-world
      register: docker_pull_result
      changed_when: true
      failed_when: docker_pull_result.rc != 0

    - name: Show result of pulling the 'hello-world' image
      debug:
        msg: >
          Pulling 'hello-world' completed with output:
          {{ docker_pull_result.stdout_lines | join('\n') }}          

    - name: Run a test container (hello-world)
      command: docker run --rm hello-world
      register: docker_run_result
      changed_when: true
      failed_when: docker_run_result.rc != 0

    - name: Display test container output
      debug:
        msg: >
          Running 'hello-world' container completed with output:
          {{ docker_run_result.stdout_lines | join('\n') }}