---
- name: Check for available port for cAdvisor
  shell: |
    for port in 8080 8081 8082 8083 8084 8085; do
      if ! ss -tulpn | grep -q ":${port} "; then
        echo "${port}"
        break
      fi
    done
  args:
    executable: /bin/bash
  register: available_port
  changed_when: false
  tags: cadvisor

- name: Ensure Docker container for cAdvisor is running
  docker_container:
    name: cadvisor
    image: gcr.io/cadvisor/cadvisor:latest
    state: started
    restart_policy: always
    ports:
      - "{{ available_port.stdout | default('8084') }}:8080"
    volumes:
      - "/:/rootfs:ro"
      - "/var/run:/var/run:ro"
      - "/sys:/sys:ro"
      - "/var/lib/docker/:/var/lib/docker:ro"
      - "/dev/disk/:/dev/disk:ro"
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
    privileged: true
    devices:
      - "/dev/kmsg:/dev/kmsg"
    cgroup_parent: "docker.slice"
  tags: cadvisor

- name: Display cAdvisor access info
  debug:
    msg: |
      cAdvisor is available at:
      - Web UI: http://{{ inventory_hostname }}:{{ available_port.stdout | default('8084') }}
      - Metrics: http://{{ inventory_hostname }}:{{ available_port.stdout | default('8084') }}/metrics
  tags: cadvisor