deploy-overlay.yml

--- 
- name: Setup registry and prepare the application image
  gather_facts: no
  hosts: localhost
  environment:
    DOCKER_HOST: "{{ DOCKER_HOST_IP }}:2375"
  tasks:
    - name: Fetch the up-to-date Consul image from DockerHub
      docker_image:
        name: consul
        tag: latest
        pull: yes

    - name: Ensure the Consul master container is up and running
      docker_container:
        name: dev-consul
        image: consul
        state: started
        network_mode: host
        command: [consul, agent, "-data-dir=/consul/data/", -server, -bootstrap, "-bind={{ DOCKER_HOST_IP }}"]

    - name: Setup an overlay network master
      docker_network:
        name: test_overlay
        driver: overlay
        ipam_options:
          subnet: '10.10.10.0/24'

    - name: Ensure the registry container is up and running
      docker_container:
        name: registry
        image: registry:2
        state: started
        ports:
          - "5000:5000"

    - name: Build an image and push it to the registry
      docker_image:
        path: ../docker-compose
        name: "{{ REGISTRY_URL }}/{{ IMAGE_NAME }}"
        tag: "{{ IMAGE_TAG }}"
        push: yes


- name: Deploy application image
  gather_facts: yes
  hosts: back
  tasks:
    - name: Copy requirements.txt to remote hosts
      copy:
        src: requirements.txt
        dest: /tmp/requirements.txt

    - name: Make sure python requirements are met
      pip:
        requirements: /tmp/requirements.txt
        extra_args: --disable-pip-version-check

    - name: Fetch the up-to-date Consul image from DockerHub
      docker_image:
        name: consul
        tag: latest
        pull: yes

    - name: Ensure the Consul container is up and running in client mode
      docker_container:
        name: consul-client
        image: consul
        state: started
        network_mode: host
        command: [consul, agent, "-data-dir=/consul/data/", "-bind={{ ansible_default_ipv4.address }}", "-retry-join={{ DOCKER_HOST_IP }}"]
        env:
          CONSUL_LOCAL_CONFIG: {"leave_on_terminate": true}

    - name: Pull the docker image from the registry
      docker_image:
        name: "{{ REGISTRY_URL }}/{{ IMAGE_NAME }}:{{ IMAGE_TAG }}"
        repository: "{{ REGISTRY_URL }}"
        use_tls: no
        state: present

    - name: Setup an overlay network
      docker_network:
        name: test_overlay
        driver: overlay
        ipam_options:
          subnet: '10.10.10.0/24'

    - name: Create the web container and run it
      docker_container:
        name: "app_example_web-{{ ansible_hostname }}"
        image: "{{ REGISTRY_URL }}/{{ IMAGE_NAME }}:{{ IMAGE_TAG }}"
        state: started
        restart: yes
        purge_networks: yes
        networks:
          - name: test_overlay
        ports:
          - "80:8000"

    - name: Create the nodes container and run it
      docker_container:
        name: "app_example_nodes-{{ ansible_hostname }}"
        image: "{{ REGISTRY_URL }}/{{ IMAGE_NAME }}:{{ IMAGE_TAG }}"
        state: started
        restart: yes
        purge_networks: yes
        networks:
          - name: test_overlay
        ports:
          - 239.255.0.42:8000:8000


- name: Shutdown the registry
  gather_facts: no
  hosts: localhost
  environment:
    DOCKER_HOST: "{{ DOCKER_HOST_IP }}:2375"
  tasks:
    - name: Shutdown and remove the registry container
      docker_container:
        name: registry
        state: absent