NoNodeAvailableException [没有已配置的节点可用]在Elasticsearch 5.1.2中

Question

在Google Compute Engine上，我创建了3个VM，并在其上安装了Elasticsearch 5.1.2 。 我安装了用于单播发现的GCE Discovery Plugin 。

从本地Web浏览器（Win7），我可以成功访问这些Elasticsearch节点。 在Google Cloud Platform上，我添加了接受tcp：9300，tcp：9200的防火墙规则。

现在，我想使用Java传输客户端与本地Java应用程序中的远程Elasticsearch节点通信。 我确定cluster.name是正确的。

代码和错误如下：

public class NativeClient {

    @SuppressWarnings({ "resource", "unchecked" })
    public static Client createTransportClient() throws UnknownHostException {

        Settings settings = Settings.builder().put("cluster.name", "elasticsearch").put("client.transport.sniff", true)
                .build();

        TransportClient client = new PreBuiltTransportClient(settings)
                .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("104.100.100.96"), 9300));

        return client;
    }

    private final Node node = null;
    private final Client client = null;
}


public class IndicesOperations {
    private final Client client;

    public IndicesOperations(Client client) {
        this.client = client;
    }

    public boolean checkIndexExists(String name){
        IndicesExistsResponse response=client.admin().indices().prepareExists(name).execute().actionGet();
        return response.isExists();
    }

    public static void main( String[] args ) throws InterruptedException, UnknownHostException {
        Client client =NativeClient.createTransportClient();
        IndicesOperations io=new IndicesOperations(client);
        String myIndex = "test";
        if(io.checkIndexExists(myIndex))
            io.deleteIndex(myIndex);
        io.createIndex(myIndex);
        Thread.sleep(1000);
        io.closeIndex(myIndex);
        io.openIndex(myIndex);
        io.deleteIndex(myIndex);
    }
}


Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{lu8DzekbSWOrNEgFgXxpgQ}{104.100.100.96}{104.100.100.96:9300}]]
    at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:328)
    at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:226)
    at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:59)
    at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:345)
    at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:403)
    at org.elasticsearch.client.support.AbstractClient$IndicesAdmin.execute(AbstractClient.java:1226)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:80)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:54)
    at com.packtpub.IndicesOperations.checkIndexExists(IndicesOperations.java:16)
    at com.packtpub.IndicesOperations.main(IndicesOperations.java:49)

elasticsearch.yml

network.host: _gce_

cloud:
  gce:
      project_id: es-cloud
      zone: asia-east1-b
discovery:
      type: gce

编辑 ：

在Google计算引擎上部署我的Java应用程序后，它可以访问在Google计算引擎上运行的elasticsearch实例。 在此应用程序中，我刚刚修改了InetAddress.getByName("10.140.0.2") 。 在本地计算机上进行部署时，我使用了该VM的external ip 。

要在本地计算机上运行它，我还需要修改什么？

Answer 1

我将虚拟机的external ip附加到network.publish_host属性，然后可以访问在远程虚拟机上运行的elasticsearch：

network.host: _gce_
network.publish_host: 104.100.100.96

cloud:
  gce:
      project_id: es-cloud
      zone: asia-east1-b
discovery:
      type: gce

我不太清楚，但是幸运的是它能正常工作。