elasticsearch for java 认证连接
环境
服务器：centos6
elasticsearch：5+
java：1.8
工具：CRT
步骤
刚开始我是参照官网的来：
Transport Client
代码如下：
package elasticsearch.estutorial;
//import 省略。。。
public class EsUtils {
public static TransportClient connectionEs(){
//设置集群的名字
Settings settings = Settings.builder().put("cluster.name", "yutao")
.put("client.transport.sniff", true)
.build();
/*//忽视连接集群时名字验证
builder.put("client.transport.ignore_cluster_name", true);
//ping 一个节点时等待时间 默认5秒
builder.put("client.transport.ping_timeout", "5s");
//多久采样 ping / 节点列表和连接
builder.put("client.transport.nodes_sampler_interval", "5s");*/
try {
//连接
@SuppressWarnings("resource")
TransportClient client = new PreBuiltTransportClient(settings)
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("192.168.116.131"), 9300));
return client;
} catch (UnknownHostException e) {
e.printStackTrace();
}
return null;
}
public static void indexApi(){
TransportClient client = connectionEs();
String json = "{" +
"\"user\":\"kimchy\"," +
"\"postDate\":\"2013-01-30\"," +
"\"message\":\"trying out Elasticsearch\"" +
"}";
List connectedNodes = client.connectedNodes();
System.out.println(connectedNodes);
IndexResponse response = client.prepareIndex("twitter", "tweet").setSource(json, XContentType.JSON).get();
String index = response.getIndex();
String type = response.getType();
String id = response.getId();
long version = response.getVersion();
RestStatus status = response.status();
System.out.println(index);
System.out.println(type);
System.out.println(id);
System.out.println(version);
System.out.println(status);
}
} main方法：
public static void main( String[] args )
{
EsUtils.indexApi();
System.out.println( "Hello World!" );
}这个时候，它总是报，类似下面的错误：
Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{hbw6d5KVQ5KJZT2rK3Oz-A}{192.168.116.131}{192.168.116.131:9300}]]
at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:347)
at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:245)
at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:59)
at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:363)
at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:408)
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 elasticsearch.estutorial.EsUtils.indexApi(EsUtils.java:63)
at elasticsearch.estutorial.App.main(App.java:11)网上的说法，就是：
①假设你改了集群的名字的话，代码里就要指定集群名称
②假设你指定了ip了，代码里同样也需要指定
③端口要使用9300
关键是上面三点我都做到了，可是还是不行。
后来猛然一想，9300的端口好像没有开放。
执行如下命令后，开放9300端口：
[yutao@localhost config]$ sudo firewall-cmd --permanent --add-port=9300/tcp
success
[yutao@localhost config]$ sudo firewall-cmd --reload
success
[yutao@localhost config]$
[yutao@localhost config]$
[yutao@localhost config]$
[yutao@localhost config]$ sudo firewall-cmd --list-all
public (active)
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: dhcpv6-client http ssh
ports: 7080/tcp 8080/tcp 9200/tcp 9300/tcp 9100/tcp 6379/tcp 5601/tcp
protocols:
masquerade: no
forward-ports:
sourceports:
icmp-blocks:
rich rules: 接着在执行代码，报错了，不过是另外一个错：
java missing authentication token for action [cluster:monitor/state]这个错，错非常明显，因为我安装了x-pack，所以需要认证：
网上搜索了一番：
X-Pack for the Elastic Stack
installing_xpackclient
Java Client and Security
引入 xpackclient
...>
elasticsearch-releases
https://artifacts.elastic.co/maven
true
false
...
...
org.elasticsearch.client
x-pack-transport
5.6.4
...
...
使用类：PreBuiltXPackTransportClient
之后代码里使用PreBuiltXPackTransportClient，而不是PreBuiltTransportClient：
public static TransportClient connectionEs(){
//设置集群的名字
Settings settings = Settings.builder().put("cluster.name", "yutao")
.put("client.transport.sniff", true)
.put("xpack.security.transport.ssl.enabled", false)
.put("xpack.security.user", "elastic:changeme").build();
/*//忽视连接集群时名字验证
builder.put("client.transport.ignore_cluster_name", true);
//ping 一个节点时等待时间 默认5秒
builder.put("client.transport.ping_timeout", "5s");
//多久采样 ping / 节点列表和连接
builder.put("client.transport.nodes_sampler_interval", "5s");*/
try {
//连接
@SuppressWarnings("resource")
// TransportClient client = new PreBuiltTransportClient(settings)
// .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("192.168.116.131"), 9300));
TransportClient client = new PreBuiltXPackTransportClient(settings)
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("192.168.116.131"), 9300));
return client;
} catch (UnknownHostException e) {
e.printStackTrace();
}
return null;
}这样就可以啦！
就我的测试项目而言，执行后的结果为：
no modules loaded
loaded plugin [org.elasticsearch.index.reindex.ReindexPlugin]
loaded plugin [org.elasticsearch.join.ParentJoinPlugin]
loaded plugin [org.elasticsearch.percolator.PercolatorPlugin]
loaded plugin [org.elasticsearch.script.mustache.MustachePlugin]
loaded plugin [org.elasticsearch.transport.Netty3Plugin]
loaded plugin [org.elasticsearch.transport.Netty4Plugin]
loaded plugin [org.elasticsearch.xpack.XPackPlugin]
[{ONRkJ5J}{ONRkJ5JxTH6Ic_E_sKhNAg}{4C0l5X7uQfShFJPj8pcXYQ}{192.168.116.131}{192.168.116.131:9300}{ml.max_open_jobs=10, ml.enabled=true}]
twitter
tweet
AWASSMU-4Wy1PJFus9gf
1
CREATED
Hello World!好了，基础而已；
参考地址：
https://www.elastic.co/guide/en/x-pack/5.6/api-java.html#_installing_xpackclient
https://www.elastic.co/guide/en/x-pack/current/java-clients.html#java-clients
https://www.elastic.co/guide/en/x-pack/current/index.html