version: '3.4'

services:
  prometheus:
    image: 'prom/prometheus:v2.31.1'
    user: root

    deploy:
      mode: 'replicated'
      replicas: 1

      placement:
        constraints:
          - 'node.labels.class == admin'
    
    configs:
      - source: prometheus_v6
        target: /etc/prometheus/prometheus.yml
    networks:
      - 'default'
      - 'monitoring'
    volumes:
      - 'prometheus:/prometheus'
      - '/var/run/docker.sock:/var/run/docker.sock'

  cadvisor:
    image: 'gcr.io/cadvisor/cadvisor:v0.38.8'

    deploy:
      mode: 'global'
        
    networks:
      - 'monitoring'
    volumes:
      - '/:/rootfs:ro'
      - '/var/run:/var/run:ro'
      - '/sys:/sys:ro'
      - '/var/lib/docker:/var/lib/docker:ro'
      - '/dev/disk:/dev/disk:ro'
      - '/var/run/docker.sock:/var/run/docker.sock:ro'


  grafana:
    image: 'grafana/grafana:8.2.5'

    deploy:
      mode: 'replicated'
      replicas: 1
      placement:
        constraints:
          - 'node.labels.class == admin'
      labels:
        - 'traefik.enable=true'
        - 'traefik.http.routers.grafana.rule=Host(`mon.rustybever.be`)'
        - 'traefik.http.routers.grafana.tls=true'
        - 'traefik.http.routers.grafana.tls.certresolver=letsEncrypt'
        - 'traefik.http.services.grafana.loadbalancer.server.port=3000'

    networks:
      - 'default'
      - 'public'
    volumes:
      - 'grafana:/var/lib/grafana'

  node-exporter:
    image: 'prom/node-exporter:v1.3.1'
    command:
      - '--path.procfs=/host/proc'
      - '--path.rootfs=/rootfs'
      - '--path.sysfs=/host/sys'
      - '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'

    deploy:
      mode: 'global'

    networks:
      - 'monitoring'
    volumes:
      - '/proc:/host/proc:ro'
      - '/sys:/host/sys:ro'
      - '/:/rootfs:ro'
      # Hopefully causes node-exporter to show the correct hostname
      - '/etc/hostname:/etc/hostname:ro'

configs:
  prometheus_v6:
    external: true

networks:
  public:
    external: true
  monitoring:
    external: true

volumes:
  prometheus:
  grafana: