I use docker-compose build a es cluster, how to connect it?

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I used docker-compose build a es cluster and reference official documents。 link:Install Elasticsearch with Docker | Elasticsearch Guide [8.11] | Elastic
I found that each of the docker-container Ip are automatically generated, and we are in the same network, we can't connect es cluster, I would like to ask this is because I configuration wrong?

docker-compose.yml 设置：

version: '2'
services:
  es_balance:
    image: elasticsearch_master:2.0
    container_name: es_balance
    environment:
      - cluster.name=elasticsearch-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - node.master=false 
      - node.data=false 
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536
        hard: 65536
    mem_limit: 1g
    cap_add:
      - IPC_LOCK
    ports:
      - 9200:9200
    networks:
      - esnet
  es_cluster:
    image: elasticsearch_slave:2.0
    environment:
      - cluster.name=elasticsearch-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=es_balance"
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536
        hard: 65536
    mem_limit: 1g
    cap_add:
      - IPC_LOCK
    networks:
      - esnet
networks:
  esnet:
    driver: bridge

visit http://local:9200/_cat/nodes?v
https://cloud.githubusercontent.com/assets/20079928/23781270/0dba057c-0587-11e7-944f-2897be43b6dd.png

visit http://local:9200/_cat/indices?v
https://cloud.githubusercontent.com/assets/20079928/23781330/8625640c-0587-11e7-984d-52ad3b242d64.png

JavaCode:

String masterHost = "172.18.0.3";

String bakHost = "172.18.0.2";

// on startup

Settings settings = Settings.builder().put("cluster.name", "elasticsearch-cluster").build();

TransportClient client = new PreBuiltTransportClient(settings)

.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(masterHost), 9300));

//.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(bakHost), 9300));

//Get API

GetResponse response = client.prepareGet("face", "summary", "AVqxwjBi2zdNu9G4HdIc").get();

Map<String, Object> source = response.getSource();

source.forEach((k,v)->System.out.println("------"+k));

Exception :

Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{BrxMkowhS9S9dZwmZcaEWg}{bigdata4.gds.com}{192.168.0.204:9300}]]
at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:344)
at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:242)
at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:59)
at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:356)
at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:403)
at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:80)
at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:54)
at org.elasticsearch.action.ActionRequestBuilder.get(ActionRequestBuilder.java:62)
at gds.bigdata.elk.TestAPIDemo.main(TestAPIDemo.java:26)

I think this is network problem? please give me some suguestion. 3Q!
all of docker-compose.yml use image is official image, I renamed it !

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at last, I used jest to operate es cluster，I don't know if there is any problem with this