rolling_update_zdm_proxy.yml

---
- name: Install Docker Python module
  hosts: proxies
  become: yes

  tasks:
    - name: Ensure Docker Ansible module is installed - Debian/Ubuntu
      include_tasks: tasks/install_docker_ansible_module.yml
      vars:
        - install_packages: false
      when: ansible_os_family == "Debian"
    - name: Ensure Docker Ansible module is installed - RedHat
      include_tasks: tasks/install_docker_ansible_module-centos.yml
      vars:
        - install_packages: false
      when: ansible_os_family == "RedHat" or ansible_os_family == "Rocky"

- name: Create ZDM proxy configuration env file based on the latest configuration
  hosts: proxies
  vars_files:
    - vars/zdm_proxy_container_config.yml
    - vars/zdm_proxy_cluster_config.yml
    - vars/zdm_proxy_core_config.yml
    - vars/zdm_proxy_advanced_config.yml
    - vars/zdm_playbook_internal_config.yml

  tasks:
    - name: Generate configuration file from template for mutable configuration
      template:
        src: "{{ 'zdm_proxy_mutable_config_env_vars.j2' if zdm_proxy_config_mode == 'env_vars' else 'zdm_proxy_mutable_config_file.j2' }}"
        dest: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_config_fragments_dir_name }}/{{ zdm_proxy_mutable_config_fragment_file_name }}"
    - name: Merge the immutable and mutable configuration files into a single one
      assemble:
        src: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_config_fragments_dir_name }}"
        dest: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_environment_config_file_name if zdm_proxy_config_mode == 'env_vars' else (zdm_proxy_shared_assets_dir_name + '/' + zdm_proxy_config_file_name) }}"

- name: Configure and restart each ZDM proxy in a rolling fashion
  hosts: proxies
  serial: 1
  become: yes
  vars_files:
    - vars/zdm_proxy_container_config.yml
    - vars/zdm_proxy_advanced_config.yml  # needed for the metrics_port variable
    - vars/zdm_playbook_internal_config.yml
    - vars/zdm_proxy_cluster_config.yml
    - vars/zdm_proxy_core_config.yml  # this inclusion is for backward compatibility and will be removed in the future

  tasks:
    - name: Create ZDM proxy container with updated env vars
      when: "zdm_proxy_config_mode == 'env_vars'"
      docker_container:
        name: "{{ zdm_proxy_container_name }}"
        image: "{{ zdm_proxy_image }}"
        env_file: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_environment_config_file_name }}"
        env:
          ZDM_ORIGIN_USERNAME: "{{ origin_username | default('') }}"
          ZDM_ORIGIN_PASSWORD: "{{ origin_password | default('') }}"
          ZDM_TARGET_USERNAME: "{{ target_username | default('') }}"
          ZDM_TARGET_PASSWORD: "{{ target_password | default('') }}"
        mounts:
          - source: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_shared_assets_dir_name }}"
            target: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_shared_assets_dir_name }}"
            type: bind
        network_mode: host
        restart_policy: unless-stopped
        restart: yes
        state: started
      vars:
        ansible_python_interpreter: python3

    - name: Create ZDM proxy container with updated configuration file
      when: "zdm_proxy_config_mode == 'conf_file'"
      docker_container:
        name: "{{ zdm_proxy_container_name }}"
        image: "{{ zdm_proxy_image }}"
        command:
          - "--config={{ zdm_proxy_home_dir }}/{{ zdm_proxy_shared_assets_dir_name }}/{{zdm_proxy_config_file_name}}"
        mounts:
          - source: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_shared_assets_dir_name }}"
            target: "{{ zdm_proxy_home_dir }}/{{ zdm_proxy_shared_assets_dir_name }}"
            type: bind
        network_mode: host
        restart_policy: unless-stopped
        restart: yes
        state: started
      vars:
        ansible_python_interpreter: python3

    - name: Wait for this ZDM proxy to come up
      uri:
        url: "http://{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}:{{ metrics_port }}/health/readiness"
        status_code: 200
      register: result
      until: result.status == 200
      retries: 6
      delay: 5
    - pause:
        prompt: "Pause for {{ pause_between_restarts_in_seconds }} seconds after restarting this ZDM proxy instance"
        seconds: "{{ pause_between_restarts_in_seconds }}"