通过代理在企业防火墙后面的 Elasticsearch RestHighLevelClient答案

【问题标题】：Elasticsearch RestHighLevelClient behind a corporate firewall via a proxy通过代理在企业防火墙后面的 Elasticsearch RestHighLevelClient
【发布时间】：2020-11-07 22:15:51
【问题描述】：

我正在尝试从我们的网络访问云 Elasticsearch 安装，这需要使用代理来处理外部请求。这是我用来传递 Elasticsearch 凭据和代理设置的代码的 sn-p：

CredentialsProvider credentialsProvider = new BasicCredentialsProvider(); credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(elasticUser, elasticPassword));

RestClientBuilder restClientBuilder = RestClient.builder(new HttpHost(hostName,port,"https")).setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider)).setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setProxy(new HttpHost(proxyURL" , 代理端口, "http")));

RestHighLevelClient 客户端 = new RestHighLevelClient(restClientBuilder);

这导致来自 ES 的响应：

“线程“主”中的异常 ElasticsearchStatusException[Elasticsearch 异常 [type=security_exception, reason=action [indices:data/read/search] 需要身份验证]]"

似乎 Elasticsearch 凭据由于某种原因未通过。

【问题讨论】：

标签： elasticsearch

【解决方案1】：

应该是这样的：

RestClientBuilder restClientBuilder = RestClient.builder(new HttpHost(hostName, port, "https"))
    .setHttpClientConfigCallback(clientBuilder -> {
      clientBuilder.setDefaultCredentialsProvider(credentialsProvider);
      clientBuilder.setProxy(new HttpHost(proxyURL, proxyPort, "http"));
      return clientBuilder;
     });

【讨论】：