Elasticsearch--javaAPI集群管理

最新推荐文章于 2022-02-14 16:11:29 发布

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本文介绍如何使用Elasticsearch的ClusterAdminClient进行集群健康状态的检查，包括获取集群名称、节点数量、数据节点数量及各索引的健康状况。同时，展示了如何设置等待状态，确保指定索引达到绿色健康状态。

1、ClusterAdminClient
2、集群健康



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());
        }
    }
}

3、Wait for statusedit



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");
        }
    }
}