Docker Compose configuration for Graylog

docker-compose.yml

version: '2'
services:
  # MongoDB: https://hub.docker.com/_/mongo/
  mongo:
    image: mongo:3
    # Persistent Logs
    volumes:
      - mongo_data:/data/db
  # Elasticsearch: https://www.elastic.co/guide/en/elasticsearch/reference/5.5/docker.html
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:5.5.2
    # Persistent Logs
    volumes:
      - es_data:/usr/share/elasticsearch/data
    environment:
      - http.host=0.0.0.0
      # Disable X-Pack security: https://www.elastic.co/guide/en/elasticsearch/reference/5.5/security-settings.html#general-security-settings
      - xpack.security.enabled=false
      - "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:2.3.2-1
    # Persistent Logs
    volumes:
      - graylog_journal:/usr/share/graylog/data/journal
    environment:
      - GRAYLOG_PASSWORD_SECRET=**PASSWORD_SECRET**
      - GRAYLOG_ROOT_PASSWORD_SHA2=**PASSWORD_SHA2**
      - GRAYLOG_WEB_ENDPOINT_URI=http://**SERVER_IP**:9000/api
      - GRAYLOG_REST_TRANSPORT_URI=http://**SERVER_IP**:9000
    links:
      - mongo
      - elasticsearch
    ports:
      # Graylog web interface and REST API
      - 9000:9000
      # Syslog TCP
      - 514:514
      # Syslog UDP
      - 514:514/udp
      # GELF TCP
      - 13999:13999
# 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