背景
最近在搞es登录，不知道是不是低版本问题（6.8.12），开启登录之后springboot连接es，es一直报Caused by: io.netty.handler.ssl.NotSslRecordException: not an SSL/TLS record: 45530000002c000000000000009108004d3603000016696e7465726e616c3a7463702f68616e647368616b650004bb91f302。
最新排查情况，es开启登录，没有springboot应用连接的话，es是没有没有报错的，结合异常信息9300、SSL/TLS协议，猜想是客户端连接没有设置证书，最后一番设置之后证实是连接没有设置证书问题。
另外，查询资料TransportClient 高版本是废弃的，但是6.8.12不高也不低，好像也没废弃，所以还是得对TransportClient 设置证书。
一、es elasticsearch.yml配置文件关于登录最新配置
#开启安全验证
xpack.security.enabled: true
#transport 开启ssl
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate#证书，自己生成吧，es自带工具能生成
xpack.security.transport.ssl.keystore.path: certs/elastic-stack-ca.p12
修改后重启es服务
二、springboot 关于es连接最新配置
maven spring-boot-starter-data-elasticsearch排除x-pack-transport模块，额外引入x-pack-transport6.8.12（版本按实际需求），这样引入才会有PreBuiltXPackTransportClient类，支持xpack相关配置属性。
...
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>x-pack-transport</artifactId>
<version>6.8.12</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
<exclusions>
<exclusion>
<groupId>org.elasticsearch.client</groupId>
<artifactId>x-pack-transport</artifactId>
</exclusion>
</exclusions>
</dependency>...
yml：enabled控制是否需要配置TransportClient，capath是证书路径文件跟服务器一致就好，username、password稍微移动到ssl（相比之前的文章，当然位置自己随便写）
spring:
data:
elasticsearch:
cluster-name: es
cluster-nodes: xxxx:9300
rest:
uris: http://xxxx:9200
ssl:
enabled: true
username: elastic
password: 123456
capath: /xxxxx/elastic-stack-ca.p12
es 配置类，配置TransportClient对象，由spring.data.elasticsearch.rest.ssl.enabled控制是否需要配置，使用setting配置需要的连接属性
cluster.name:集群名字
xpack.security.user:账号密码
xpack.security.transport.ssl.enabled：开启ssl
xpack.security.transport.ssl.verification_mode：证书模式跟服务配置一致
xpack.security.transport.ssl.keystore.path:证书路径
xpack.security.transport.ssl.keystore.password：证书密码，生成证书时候有输入密码，需要一致
package com.xxxx.configuration;import java.net.InetAddress;
import java.util.stream.Stream;import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.xpack.client.PreBuiltXPackTransportClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.config.AbstractElasticsearchConfiguration;
import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;/*** * 描述：elasticsearch配置* @author sakyoka* @date 2024年10月11日 下午3:47:19*/
@Configuration
public class ElasticsearchConfiguration extends AbstractElasticsearchConfiguration {@Value("${spring.data.elasticsearch.cluster-name}")private String clusterName;@Value("${spring.data.elasticsearch.cluster-nodes}")private String clusterNodes;@Value("${spring.data.elasticsearch.rest.uris}")private String uris;@Value("${spring.data.elasticsearch.rest.ssl.username:}")private String username;@Value("${spring.data.elasticsearch.rest.ssl.password:}")private String password;@Value("${spring.data.elasticsearch.rest.ssl.capath:}")private String caPath;@Beanpublic ElasticsearchRestTemplate elasticsearchRestTemplate(RestHighLevelClient client) {return new ElasticsearchRestTemplate(elasticsearchClient());}@Overridepublic RestHighLevelClient elasticsearchClient(){System.setProperty("es.set.netty.runtime.available.processors", "false");CredentialsProvider credentialsProvider = new BasicCredentialsProvider();credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password));RestClientBuilder builder = RestClient.builder(HttpHost.create(uris)).setHttpClientConfigCallback(http -> {return http.setDefaultCredentialsProvider(credentialsProvider);});return new RestHighLevelClient(builder);}@Bean@ConditionalOnProperty(name = "spring.data.elasticsearch.rest.ssl.enabled")public TransportClient transportClient() throws Exception {Settings settings = Settings.builder().put("cluster.name", clusterName).put("xpack.security.user", username + ":" + password).put("xpack.security.transport.ssl.enabled", true).put("xpack.security.transport.ssl.verification_mode", "certificate").put("xpack.security.transport.ssl.keystore.path", caPath).put("xpack.security.transport.ssl.keystore.password", password).build();TransportClient client = new PreBuiltXPackTransportClient(settings);Stream.of(clusterNodes.split(",")).forEach(nodeName -> {try {client.addTransportAddress(new TransportAddress(InetAddress.getByName(nodeName.split(":")[0]), Integer.valueOf(nodeName.split(":")[1])));} catch (Exception e) {throw new RuntimeException("es 注册节点：" + nodeName, e);}});return client;}
}
相关配置配置好之后启动应用，会发现es日志不再报Caused by: io.netty.handler.ssl.NotSslRecordException: not an SSL/TLS record:
总结：
万恶的版本，好多类缺失不兼容，搞了好久
