1、ClusterAdminClient
ESUtil.java类中增加获取集群管理的ClusterAdminClient对象的方法
/**
* 获取集群管理的ClusterAdminClient对象
*/
public static ClusterAdminClient getClusterAdminClient(){
return getClient().admin().cluster();
}
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2、集群健康
package cn.hadron;
import cn.hadron.es.ESUtil;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.elasticsearch.cluster.health.ClusterIndexHealth;
public class ClusterAdminDemo {
public static void main(String[] args){
ClusterHealthResponse healths = ESUtil.getClusterAdminClient().prepareHealth().get();
String clusterName = healths.getClusterName();
System.out.println("clusterName="+clusterName);
int numberOfDataNodes = healths.getNumberOfDataNodes();
System.out.println("numberOfDataNodes="+numberOfDataNodes);
int numberOfNodes = healths.getNumberOfNodes();
System.out.println("numberOfNodes="+numberOfNodes);
for (ClusterIndexHealth health : healths.getIndices().values()) {
String index = health.getIndex();
int numberOfShards = health.getNumberOfShards();
int numberOfReplicas = health.getNumberOfReplicas();
System.out.printf("index=%s,numberOfShards=%d,numberOfReplicas=%d\n",index,numberOfShards,numberOfReplicas);
ClusterHealthStatus status = health.getStatus();
System.out.println(status.toString());
}
}
}
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clusterName=elasticsearch
numberOfDataNodes=1
numberOfNodes=1
index=mydate,numberOfShards=5,numberOfReplicas=1
YELLOW
index=website,numberOfShards=5,numberOfReplicas=1
YELLOW
index=test,numberOfShards=5,numberOfReplicas=1
YELLOW
index=my-index,numberOfShards=5,numberOfReplicas=1
YELLOW
index=book,numberOfShards=5,numberOfReplicas=1
YELLOW
index=child_example,numberOfShards=5,numberOfReplicas=1
YELLOW
index=join_index,numberOfShards=5,numberOfReplicas=1
YELLOW
index=index,numberOfShards=5,numberOfReplicas=1
YELLOW
index=blog,numberOfShards=5,numberOfReplicas=1
YELLOW
index=index_1,numberOfShards=5,numberOfReplicas=1
YELLOW
index=index_2,numberOfShards=5,numberOfReplicas=1
YELLOW
index=twitter,numberOfShards=5,numberOfReplicas=1
YELLOW
index=books,numberOfShards=5,numberOfReplicas=1
YELLOW
index=my_index,numberOfShards=5,numberOfReplicas=1
YELLOW
index=index1,numberOfShards=5,numberOfReplicas=1
YELLOW
index=logs,numberOfShards=5,numberOfReplicas=1
YELLOW
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3、Wait for statusedit
You can use the cluster health API to wait for a specific status for the whole cluster or for a given index:
client.admin().cluster().prepareHealth()
.setWaitForYellowStatus()
.get();
client.admin().cluster().prepareHealth("company")
.setWaitForGreenStatus()
.get();
client.admin().cluster().prepareHealth("employee")
.setWaitForGreenStatus()
.setTimeout(TimeValue.timeValueSeconds(2))
.get();
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package cn.hadron;
import cn.hadron.es.ESUtil;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
public class ClusterAdminDemo {
public static void main(String[] args){
ClusterHealthResponse response=ESUtil.getClusterAdminClient()
.prepareHealth("website")
.setWaitForGreenStatus()
.get();
ClusterHealthStatus status = response.getIndices().get("website").getStatus();
if (!status.equals(ClusterHealthStatus.GREEN)) {
throw new RuntimeException("Index is in " + status + " state");
}
}
}
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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.Netty4Plugin]
Exception in thread “main” java.lang.RuntimeException: Index is in YELLOW state
at cn.hadron.ClusterAdminDemo.main(ClusterAdminDemo.java:17)Process finished with exit code 1
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