playbook.yml

---
- name: Create a partition of 40GB for Docker and install Docker
  hosts: docker_swarm_manager, docker_swarm_worker
  become: true
  tasks:
    - name: Make sure Docker daemon starts automatically at system startup
      service:
        name: docker
        state: started
        enabled: true
  roles:
    - ansible-role-partition
    - ansible-role-docker

- name: Securely expose the Docker Daemon REST APIs
  hosts: docker_swarm_manager, docker_swarm_worker
  roles:
    - role: ansible-role-docker-remote-api
      docker_remote_client_use_certs_as_default: true
      docker_remote_server_force_deploy: true
      docker_remote_client_become: true
      docker_remote_certs_server_additional_subjects:
        - "DNS:{{ ansible_hostname }}"
        - "IP:{{ ip }}"

- name: Set up a Docker Swarm on VMs
  hosts: docker_swarm_manager, docker_swarm_worker
  become: true
  roles:
    - ansible-dockerswarm
  vars:
    docker_swarm_interface: "eth1"

- name: Create a test service "web1" from the local machine to the Docker Swarm
  hosts: localhost
  tasks:
    - name: Check if the service "web1" already exists
      shell: docker service ls -f name=web1 | grep '\sweb1\s' | awk '{ print $1 }'
      environment:
        DOCKER_HOST: "tcp://192.168.77.21:2376"
        DOCKER_TLS_VERIFY: 1
      register: service_exists
      changed_when: false
    - name: Create a nginx service "web1" on the Docker Swarm
      command: docker service create --replicas 2 -p 80:80 --name web1 nginx
      environment:
        DOCKER_HOST: "tcp://192.168.77.21:2376"
        DOCKER_TLS_VERIFY: 1
      register: docker_service_deploy_result
      when: service_exists.stdout | length == 0
    - name: Show the result
      debug:
        var: docker_service_deploy_result