- name: Set up Prometheus
  hosts: lotus-land-story
  vars_files:
    - vars.yml
  tasks:

    - name: Install host exporters
      ansible.builtin.apt:
        pkg:
          - prometheus-node-exporter
          - prometheus-postgres-exporter
        state: present

    - name: Configure node-exporter
      ansible.builtin.lineinfile:
        dest: /etc/default/prometheus-node-exporter
        regexp: '^ARGS='
        # Include filesystems under /mnt
        line: ARGS='--collector.filesystem.ignored-mount-points="^/(dev|proc|run|sys|media|var/lib/docker/.+)($|/)"'
        state: present

    # /usr/share/doc/prometheus-postgres-exporter/README.Debian
    - name: Configure postgres-exporter
      ansible.builtin.lineinfile:
        dest: /etc/default/prometheus-postgres-exporter
        regexp: '^DATA_SOURCE_NAME='
        line: "DATA_SOURCE_NAME='user=prometheus host=/run/postgresql dbname=postgres'"
        state: present

    - name: Create Prometheus dir
      ansible.builtin.file:
        path: /mnt/lotus-land-story/prometheus
        state: directory
        owner: prometheus
        group: prometheus
        mode: "0755"

    - name: Prometheus config
      ansible.builtin.template:
        dest: /mnt/lotus-land-story/prometheus/prometheus.yml
        src: templates/prometheus.yml
        owner: prometheus
        group: prometheus
        mode: "0600"

    - name: Create Prometheus volume
      community.docker.docker_volume:
        name: prometheus

    - name: Get prometheus user info
      ansible.builtin.user:
        name: prometheus
      register: prometheus_user

    - name: Run Prometheus
      community.docker.docker_container:
        # recreate: true
        # restart: true
        name: prometheus
        image: prom/prometheus:v2.43.0
        command:
          - --config.file=/etc/prometheus/prometheus.yml
          - --storage.tsdb.retention.size=5GB
          - --log.format=json
        restart: true
        user: "{{ prometheus_user.uid }}"
        groups: "{{ prometheus_user.group }}"
        volumes:
          - /mnt/lotus-land-story/prometheus:/etc/prometheus
          - prometheus:/prometheus
        restart_policy: unless-stopped
        networks:
          - name: lotus_land_story
        etc_hosts:
          host.docker.internal: host-gateway

# vim: ft=yaml.ansible