使用 Spring 数据 Elasticsearch(反应)连接到 ES 给出错误主机不可访问

Connecting to ES with Spring Data Elasticsearch (reactive) gives error host not reachable

我正在 运行 使用 aws-elasticsearch(带有 OpenSearch 1.1.x)服务,我正在尝试使用 spring 从 spring 应用程序连接它]-data-elasticsearch,根据 doc 我按照说明配置了 bean。

在我的本地我使用了来自我的 aws 帐户的 ssh 隧道。

我使用了这个命令:

ssh -4 -i my-creds.pem ec2-user@xxxx.xxxx.xxxx.xxxx -N -L 9200:vpc-my-custom-domain-etc.us-east-1.es.amazonaws.com:443

所以我可以通过端口 9200 在我的浏览器中通过本地主机连接 OpenSearch 仪表板。

使用来自 OpenSearch 的 OpenSearch RestHighLevelClient 禁用 我可以连接的 ssl,它在这里工作得很好 OS RHLC 的配置:

import org.apache.http.HttpHost;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.Map;

public class OSSCLientWorks{

    private static final Logger log = LoggerFactory.getLogger(ClientAutoWrapper.class);

    public void request(String indexName, Map<String, Object> doc) throws IOException {

        //Create a client.
        RestClientBuilder builder = RestClient.builder(new HttpHost("localhost", 9200, "https"))
                .setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder
                        //.addInterceptorFirst(interceptor) //-> for AwsRequestInterceptor due to some struggles i had, not necessary to work with localhost
                        .setSSLHostnameVerifier((hostname, session) -> true));
        try (RestHighLevelClient hlClient = new RestHighLevelClient(builder)) {

            CreateIndexRequest createIndexRequest = new CreateIndexRequest(indexName);

            var createIndexResp = hlClient.indices().create(createIndexRequest, RequestOptions.DEFAULT);
            log.info("Create index resp {}", createIndexResp);

            IndexRequest indexRequest = new IndexRequest(createIndexResp.index())
                    .id(String.valueOf(doc.get("id")))
                    .source(doc);
            var response = hlClient.index(indexRequest, RequestOptions.DEFAULT);
            var resp = response.toString();
            log.info("response is {}", json);
        }
    }

}

,但是当我尝试使用 spring 及其反应式客户端时,我收到此错误:

reactor.core.Exceptions$ErrorCallbackNotImplemented: org.springframework.data.elasticsearch.client.NoReachableHostException: Host 'localhost:9200' not reachable. Cluster state is offline.
Caused by: org.springframework.data.elasticsearch.client.NoReachableHostException: Host 'localhost:9200' not reachable. Cluster state is offline.

这是我用来使用 spring-data-elasticsearch 的配置:

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.client.ClientConfiguration;
import org.springframework.data.elasticsearch.client.reactive.ReactiveElasticsearchClient;
import org.springframework.data.elasticsearch.client.reactive.ReactiveRestClients;
import org.springframework.data.elasticsearch.config.AbstractReactiveElasticsearchConfiguration;
import org.springframework.data.elasticsearch.core.ReactiveElasticsearchOperations;
import org.springframework.data.elasticsearch.core.ReactiveElasticsearchTemplate;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;
import org.springframework.data.elasticsearch.repository.config.EnableReactiveElasticsearchRepositories;


@Configuration
@EnableReactiveElasticsearchRepositories(basePackages = {"com.elastic.repo"})
public class ElasticRestHighLevelClientConfig extends AbstractReactiveElasticsearchConfiguration {

    @Override
    @Bean
    public ReactiveElasticsearchClient reactiveElasticsearchClient() {
        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()
                .connectedTo("localhost:9200")
                .build();
        return ReactiveRestClients.create(clientConfiguration);
    }


    @Bean
    public ReactiveElasticsearchOperations elasticsearchOperations(ReactiveElasticsearchClient reactiveElasticsearchClient) {
        return new ReactiveElasticsearchTemplate(reactiveElasticsearchClient);
    }
}

我也尝试了其他人在 SO and Github 上发布的一些解决方案,但问题仍然存在,有人对此有解决方法吗?我做错了什么?

here为了解决问题我做了个demo

非常感谢您!

编辑:清晰度

您必须使用以下usingSsl()方法之一将 SSL 配置为对反应式客户端使用:

@Override
    @Bean
    public ReactiveElasticsearchClient reactiveElasticsearchClient() {
        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()
                .connectedTo("localhost:9200")
                .usingSsl()                 // <-- 
                .build();
        return ReactiveRestClients.create(clientConfiguration);
    }

NoReachableHostException 只是他们在 lookupActiveHost(HostProvider 接口)失败时抛出的一般错误。

你应该调试之前发生的事情 - 对你来说它可能在这里:

@Override public 单声道 clusterInfo() {

    return createWebClient(endpoint) //
            .head().uri("/") //
            .exchangeToMono(it -> {
                if (it.statusCode().isError()) {
                    state = ElasticsearchHost.offline(endpoint);
                } else {
                    state = ElasticsearchHost.online(endpoint);
                }
                return Mono.just(state);
            }).onErrorResume(throwable -> {
                state = ElasticsearchHost.offline(endpoint);
                clientProvider.getErrorListener().accept(throwable);
                return Mono.just(state);
            }).map(elasticsearchHost -> new ClusterInformation(Collections.singleton(elasticsearchHost)));
}

查看错误恢复的真正异常是什么。

我打赌你会遇到 SSL 握手异常,你可以在 clientConfiguration 中用 .usingSsl({SSL CONTEXT HERE}) 修复它

您可以像这样创建不安全的上下文(如果需要,转换为 java):

SSLContext.getInstance("TLS") .apply { init(null, InsecureTrustManagerFactory.INSTANCE.trustManagers, SecureRandom()) }