ansible-nas/roles/stats/tasks/prometheus.yml

---
- name: Start Prometheus
  block:
    - name: Create Prometheus Config Directory
      ansible.builtin.file:
        path: "{{ item }}"
        state: directory
      with_items:
        - "{{ stats_prometheus_data_directory }}"
        - "{{ stats_prometheus_config_directory }}"

    - name: Create Prometheus Data Directory
      ansible.builtin.file:
        path: "{{ item }}"
        state: directory
        mode: 0777
      with_items:
        - "{{ stats_prometheus_data_directory }}"
        - "{{ stats_prometheus_config_directory }}"

    - name: Template Prometheus config
      ansible.builtin.template:
        src: prometheus.yml.j2
        dest: "{{ stats_prometheus_config_directory }}/prometheus.yml"
      register: prometheus_config

    - name: Prometheus Docker Container
      community.docker.docker_container:
        name: "{{ stats_prometheus_container_name }}"
        image: "{{ stats_prometheus_image_name }}:{{ stats_prometheus_image_version }}"
        pull: true
        volumes:
          - "{{ stats_prometheus_config_directory }}/prometheus.yml:/etc/prometheus/prometheus.yml:ro"
          - "{{ stats_prometheus_data_directory }}:/prometheus:rw"
          - "/etc/timezone:/etc/timezone:ro"
        ports:
          - "{{ stats_prometheus_port }}:9090"
        restart_policy: unless-stopped
        memory: "{{ stats_prometheus_memory }}"
        restart: "{{ prometheus_config is changed }}"
        command: "--config.file=/etc/prometheus/prometheus.yml --storage.tsdb.retention.size={{ stats_prometheus_retention_size }} --storage.tsdb.retention.time={{ stats_prometheus_retention_time }}"
        labels:
          traefik.enable: "{{ stats_prometheus_available_externally | string }}"
          traefik.http.routers.prometheus.rule: "Host(`{{ stats_prometheus_hostname }}.{{ ansible_nas_domain }}`)"
          traefik.http.routers.prometheus.tls.certresolver: "letsencrypt"
          traefik.http.routers.prometheus.tls.domains[0].main: "{{ ansible_nas_domain }}"
          traefik.http.routers.prometheus.tls.domains[0].sans: "*.{{ ansible_nas_domain }}"
          traefik.http.services.prometheus.loadbalancer.server.port: "9090"
  when: stats_enabled is true

- name: Stop Prometheus
  block:
    - name: Stop Prometheus
      community.docker.docker_container:
        name: "{{ stats_prometheus_container_name }}"
        state: absent
  when: stats_enabled is false