将 springboot java RestHighLevelClient 连接到 aws elasticsearch答案

【问题标题】：Connect springboot java RestHighLevelClient to aws elasticsearch将 springboot java RestHighLevelClient 连接到 aws elasticsearch
【发布时间】：2021-08-11 06:55:14
【问题描述】：

配置：

private static final String HOST = "search-qas-sam-zxbalglrksamjfcazl3zmkiiq7.ap-south-1.es.amazonaws.com";
private static final int PORT = 443; // tries 9200, 9300, 80
private static final String PROTOCOL = "https";

@Bean
public RestHighLevelClient client() {
    final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
    credentialsProvider.setCredentials(AuthScope.ANY,
            new UsernamePasswordCredentials("myusername", "mypassword"));

    RestClientBuilder builder = RestClient.builder(new HttpHost( HOST, PORT, PROTOCOL))
            .setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                @Override
                public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                    return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
                }
            });

在我的本地机器上连接到 ElasticSearch 时，在 localhost 和端口 9200 上运行，它可以工作。

但是在尝试连接 AWS 时，出现以下错误：

Caused by: org.springframework.data.elasticsearch.client.NoReachableHostException: Host 'localhost:9200'

另外，如果我在浏览器中打开我的 AWS ElasticSearch，它的状态会显示为：

{
  "name" : "asjsbsghjmnkl1f05283a21d38yh9ij",
  "cluster_name" : "5583974864:qas",
  "cluster_uuid" : "8wWV8ujji9kbzg",
  "version" : {
    "number" : "7.10.2",
    "build_flavor" : "oss",
    "build_type" : "tar",
    "build_hash" : "unknown",
    "build_date" : "2021-04-21T04:22:10.395481Z",
    "build_snapshot" : false,
    "lucene_version" : "8.7.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

将spring-boot 2.4.5 与spring-data-elasticsearch 一起使用：

implementation ('org.springframework.data:spring-data-elasticsearch') {
    exclude group: 'org.apache.lucene'
}

在发布之前，我尝试了以下方法：

但它们都不起作用。

【问题讨论】：

标签： java spring-data-elasticsearch amazon-elasticsearch resthighlevelclient

【解决方案1】：

有两种选择：

Java 配置：

@Configuration
@EnableElasticsearchRepositories(basePackages = "com.arun.elasticsearch.repository")
@ComponentScan(basePackages = { "com.arun.elasticsearch.service" })
public class ElasticSearchConfig {
    private static final String HOST = "aws_host"; // localhost
    private static final int PORT = 443; // 9092
    private static final String PROTOCOL = "https"; // http

    @Bean
    public RestHighLevelClient client() {
       final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY,
                new UsernamePasswordCredentials("UserName", "Password"));

        RestClientBuilder builder = RestClient.builder(new HttpHost( HOST, PORT, PROTOCOL))
                .setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                    @Override
                    public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                        return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
                    }
                });
    }

Spring yml：

elasticsearch:
  rest:
    uris: https://MyHost:9200
    username: arun
    password: mypassword

【讨论】：

【解决方案2】：

请查看 Spring Data Elasticsearch 文档，尤其是关于

创建RestHighLevelClient:https://docs.spring.io/spring-data/elasticsearch/docs/4.2.1/reference/html/#elasticsearch.clients.rest
配置选项：https://docs.spring.io/spring-data/elasticsearch/docs/4.2.1/reference/html/#elasticsearch.clients.configuration

【讨论】：