在 Openshift 容器平台(基于云的 Kubernetes 容器平台)中通过 spring 引导调用服务时名称或服务未知

Name or Service not Known when calling service via spring boot in Openshift Container Platform (a cloud-based Kubernetes container platform)

我有一个由后端(spring 引导)和搜索引擎 (elasticsearch) 组成的应用程序。在我将它部署到 OCP 之后,最初我使用命令“curl”从后端 pod 测试了两者之间的连接到 elasticsearch 服务 (https://service-name.namespace.svc.cluster.local:9200),它工作正常。这是图片:

但是,当我尝试从部署的后端应用程序中访问 elasticsearch 时,出现如下错误消息:

下面是我在 Spring 引导连接 Elasticsearch 时所做的配置:

package com.siolbca.config;

import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.client.ClientConfiguration;
import org.springframework.data.elasticsearch.client.RestClients;
import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;

@Configuration
@EnableElasticsearchRepositories(basePackages = "com.siolbca.repository")
@ComponentScan(basePackages = "com.siolbca.services")
public class Config {
    @Bean
    public RestHighLevelClient client() {
        ClientConfiguration clientConfiguration 
            = ClientConfiguration.builder()
                .connectedTo("https://elasticsearch-siol-es-http.siolbca-dev.svc.cluster.local:9200")
                .usingSsl()
                .withBasicAuth("elastic","G0D1g6TurJ79pcxr1065pU0U")
                .build();

        return RestClients.create(clientConfiguration).rest();
    }

    @Bean
    public ElasticsearchOperations elasticsearchTemplate() {
        return new ElasticsearchRestTemplate(client());
    }

}

我做过的一些事情是:

  1. 直接在后端配置中使用elasticsearch服务IP地址

https://elasticsearch-service-ipaddress:9200

  1. 从 elasticsearch 服务暴露一个路由,并把它放在后端配置中

https://elasticsearch-route:443

  1. 将服务url改为

https://service-name.namespace.svc:9200

有谁知道为什么我的后端应用程序无法与 elasticsearch 服务通信,即使两个 pods 能够连接?任何答案都会非常有帮助。谢谢。


编辑

这是我的 pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.siolbca</groupId>
    <artifactId>siolbca</artifactId>
    <version>1.0</version>
    <name>siolbca</name>
    <description>Backend project for SIOLBCA</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-elasticsearch</artifactId>
            <version>4.0.0.RELEASE</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

我认为 elasticsearch 构建器 .connectedTo 方法需要格式 host:port,即没有协议。 所以尝试:

.connectedTo("elasticsearch-siol-es-http.siolbca-dev.svc.cluster.local:9200")