version: '2'
services:
  # MongoDB: https://hub.docker.com/_/mongo/
  mongodb:
    image: mongo:4.0
    volumes:
      - mongo_data:/data/db
  # Elasticsearch: https://www.elastic.co/guide/en/elasticsearch/reference/6.x/docker.html
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.8.5
    volumes:
      - es_data:/usr/share/elasticsearch/data
    environment:
      - http.host=0.0.0.0
      - transport.host=localhost
      - network.host=graylog.example.com
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    mem_limit: 1g
  # Graylog: https://hub.docker.com/r/graylog/graylog/
  graylog:
    image: graylog/graylog:3.2.2
    volumes:
      - graylog_journal:/usr/share/graylog/data/journal
    volumes:
      - ./certs/graylog.crt:/certs/graylog.crt
      - ./certs/graylog.key:/certs/graylog.key
      - ./config/hosts:/etc/hosts
    logging:
      driver: syslog
    environment:
      # CHANGE ME (must be at least 16 characters)!
      - GRAYLOG_PASSWORD_SECRET=graylogserverforaws
      # Password: admin
      - GRAYLOG_ROOT_PASSWORD_SHA2=c674ad0246d53361ee006b2ab11ae465331d387e7aea1ea4b2a25a75f038b69e
      - GRAYLOG_HTTP_EXTERNAL_URI=https://graylog.example.com:9000/
      - GRAYLOG_HTTP_PUBLISH_URI=https://graylog.example.com:9000/
      - GRAYLOG_HTTP_ENABLE_TLS=true
      - GRAYLOG_HTTP_TLS_CERT_FILE=/certs/graylog.crt
      - GRAYLOG_HTTP_TLS_KEY_FILE=/certs/graylog.key
    links:
      - mongodb:mongo
      - elasticsearch
    depends_on:
      - mongodb
      - elasticsearch
    ports:
      # Graylog web interface and REST API
      - 9000:9000
      - 443:9000
      # Syslog TCP
      - 1514:1514
      # Syslog UDP
      - 1514:1514/udp
      # GELF TCP
      - 12201:12201
      # GELF UDP
      - 12201:12201/udp
# Volumes for persisting data, see https://docs.docker.com/engine/admin/volumes/volumes/
volumes:
  mongo_data:
    driver: local
  es_data:
    driver: local
  graylog_journal:
    driver: local