- name: Set up Prometheus
  hosts: lotus-land-story
  vars_files:
    - vars.yml
  vars:
    prometheus_version: v2.54.1
    cadvisor_version: v0.51.0
  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:
        name: prometheus
        image: prom/prometheus:{{ prometheus_version }}
        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

    - name: Run cAdvisor
      community.docker.docker_container:
        name: cadvisor
        image: gcr.io/cadvisor/cadvisor:{{ cadvisor_version }}
        restart: true
        command:
          #https://github.com/google/cadvisor/issues/2523#issuecomment-2258042352
          - "--housekeeping_interval=30s"
          - "--docker_only=true"
          - "--store_container_labels=false"
        volumes:
          - /:/rootfs:ro
          - /var/run:/var/run:rw
          - /sys:/sys:ro
          - /var/lib/docker/:/var/lib/docker:ro
          - /etc/machine-id:/etc/machine-id:ro
        restart_policy: unless-stopped
        networks:
          - name: lotus_land_story

# vim: ft=yaml.ansible