zookeeper:
  image: zookeeper
  ports:
    - "2181:2181"
    - "2888:2888"
    - "3888:3888"
  hostname: zookeeper1
  volumes:
    - /data/zookeeper/data:/data
    - /data/zookeeper/datalog:/datalog
  environment:
    - ZOO_MY_ID=1
    - ZOO_SERVERS=server.1=0.0.0.0:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
  extra_hosts:
    - zookeeper1:10.0.0.21
    - zookeeper2:10.0.0.22
    - zookeeper3:10.0.0.23
  restart: always