docker-compose.yml

version: "3"

volumes:
    prometheus_data: {}
    grafana_data: {}

networks:
  monitor-net:
    driver: bridge

services:
  #
  # The container names share a common prefix "omon" to avoid conflict
  # with pre existing containers on the system.
  #
  # Also, the port numbers were chosen for the same reason.
  #

  opengrok:
    # Runs mirroring + indexing.
    container_name: omon-opengrok
    image: opengrok/docker:latest
    ports:
      - "7777:8080/tcp"
    environment:
      REINDEX: '5'
      INDEXER_OPT: '-R /opengrok/etc/opengrok-statsd.xml'
    # Volumes store your data between container upgrades.
    volumes:
       - './opengrok/src/:/opengrok/src/'
       - './opengrok/data/:/opengrok/data/'
       - './opengrok/etc/:/opengrok/etc/'
    networks:
      - monitor-net
    restart: unless-stopped

  statsd_exporter:
    # Collects statsd metrics and converts them into Prometheus metrics.
    container_name: omon-statsd-exporter
    image: prom/statsd-exporter
    networks:
      - monitor-net
    restart: unless-stopped
    ports:
      - "9123:9102"
      - "8125:8125/udp"
    volumes:
      - './mapping.yml:/tmp/mapping.yml'
    command:
      - '--statsd.mapping-config=/tmp/mapping.yml'
      - '--statsd.listen-udp=:8125'
      - '--web.listen-address=:9102'

  prometheus:
    # Collects metrics by scraping:
    #   - the OpenGrok /metrics/prometheus endpoint
    #   - statsd exporter 9123 TCP port
    container_name: omon-prometheus
    image: prom/prometheus
    expose:
      - 9999
    networks:
      - monitor-net
    depends_on:
      - statsd_exporter
    volumes:
      - prometheus_data:/prometheus
      - './prometheus.yml:/etc/prometheus/prometheus.yml'
    command:
      - '--config.file=/etc/prometheus/prometheus.yml'
      - '--web.listen-address=:9999'
    restart: unless-stopped

  grafana:
    # Displays the metrics retrieved from Prometheus.
    container_name: omon-grafana
    image: grafana/grafana
    depends_on:
      - prometheus
    ports:
      - "3333:3000/tcp"
    volumes:
      - grafana_data:/var/lib/grafana
      - './grafana/provisioning:/etc/grafana/provisioning'
    networks:
      - monitor-net
    environment:
      - GF_SECURITY_ADMIN_USER=${ADMIN_USER}
      - GF_SECURITY_ADMIN_PASSWORD=${ADMIN_PASSWORD}
      - GF_USERS_ALLOW_SIGN_UP=false
    restart: unless-stopped