在弹性集群模式下创建java RestHighLevelClient

Posted 2021-03-31

如果elasticsearch在单一模式下运行，我可以使用以下代码行轻松建立RestHighLevel连接：

RestHighLevelClient client = new RestHighLevelClient(
    RestClient.builder(
            new HttpHost("localhost", 9200, "http"),
            new HttpHost("localhost", 9201, "http")));

但是，如果我的弹性集群有3台机器，例如“host1”，“host2”，“host3”，那么如何在集群模式下创建其余的高级客户端？

谢谢

答案

RestHighLevelClient client = new RestHighLevelClient(
        RestClient.builder(
                new HttpHost("host1", 9200, "http"),
                new HttpHost("host2", 9200, "http"),
                new HttpHost("host2", 9200, "http")
        )
);

作为doc it looks like you were referencing states，RestClient.builder接受一个HttpHosts数组来连接。客户端（引擎盖下是ES低级别REST客户端）将循环请求这些主机。另见Javadoc。