Springcloud服务同时使用eureka和nacos

一，背景

之所以会想到一个服务同时使用eureka和nacos，是因为遇到一个需求，配置数据是存储在nacos的配置中，然后使用该配置的服务却是在一个eureka环境中。所以此时就需要一个代理服务，它既能够从nacos的config中获取配置数据，又是注册到eureka注册中心中。

二，代理服务创建和配置

2.1 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>lmc-tools</artifactId>
        <groupId>com.lmc</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>tools-2-eureka-nacos</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.lmc</groupId>
            <artifactId>tools-common</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

<!--        <dependency>-->
<!--            <groupId>com.alibaba.cloud</groupId>-->
<!--            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>-->
<!--            <version>2021.1</version>-->
<!--        </dependency>-->

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2021.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
            <version>3.1.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

    </dependencies>

</project>

注意，关于nacos，在该服务中不能引入spring-cloud-starter-alibaba-nacos-discovery依赖，只需要引入spring-cloud-starter-alibaba-nacos-config

2.2 bootstrap.yml

server:
  port: 9006
  servlet:
    context-path: /eureka-proxy

spring:
  application:
    name: tools-eureka-proxy
  profiles:
    active: dev
management:
  endpoints:
    web:
      exposure:
        include: "*"

bootstrap-dev.yml

spring:
  cloud:
    nacos:
      server-addr: localhost:9000
      config:
        namespace: 8628e5dd-a236-4016-b94f-565a001faf2f
        file-extension: yaml  # 配置内容的数据格式
        extension-configs[0]:
          data-id: ${spring.application.name}-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}
          group: dev
          refresh: true

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka
    registry-fetch-interval-seconds: 10
  instance:
    instance-id: ${spring.application.name}:${spring.cloud.client.ip-address}:${server.port} # 实例名：application:ip:port
    prefer-ip-address: true # 优先使用IP地址作为主机名的标识
    lease-renewal-interval-in-seconds: 180 # 续约更新时间间隔
    lease-expiration-duration-in-seconds: 200

2.3 Application.java

package per.lmc.tools2.eureka;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @author lmc
 * @Description: TODO
 * @Create 2022-05-28 19:39
 * @version: 1.0
 */
@SpringBootApplication
@EnableDiscoveryClient
public class EurekaProxyApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaProxyApplication.class, args);
    }
}

2.4 创建接口

2.4.1 ApiMessageController.java

package per.lmc.tools2.eureka.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import per.lmc.tools2.eureka.config.MyNacosProperties;
import com.lmc.common.enums.LanguageEnum;
import com.lmc.common.enums.SplitEnum;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @author lmc
 * @Description: TODO API返回参数接口
 * @Create 2022-05-29 13:45
 * @version: 1.0
 */
@RestController
@RequestMapping("/apiMessages")
public class ApiMessageController {

    @Autowired
    private MyNacosProperties myNacosProperties;

    /**
     * 获取所有apiMessages
     * @param language 语言
     * @return 数据集合
     */
    @GetMapping("/getAll")
    public Map<String, String> apiMessages(String language) {
        List<String> apiMessages = myNacosProperties.getApiMessages();
        Map<String, String> result = new HashMap<>(20);
        if (!CollectionUtils.isEmpty(apiMessages)) {
            if (LanguageEnum.English.value().equalsIgnoreCase(language)) {
                apiMessages.forEach(a -> result.put(a.split(SplitEnum.API_MESSAGE_SPLIT.value())[0], a.split(SplitEnum.API_MESSAGE_SPLIT.value())[2]));
            }else {
                apiMessages.forEach(a -> result.put(a.split(SplitEnum.API_MESSAGE_SPLIT.value())[0], a.split(SplitEnum.API_MESSAGE_SPLIT.value())[1]));
            }
        }
        return result;
    }

    /**
     * 通过code获取APIMessage
     * @param language 语言
     * @param code 参数代码
     * @return 参数代码指定信息
     */
    @GetMapping("/getOne")
    public String getMessage(String language, String code) {
        // 获取指定code的记录
        List<String> apiMessages = myNacosProperties.getApiMessages().stream().filter(a -> a.startsWith(code)).collect(Collectors.toList());
        if (CollectionUtils.isEmpty(apiMessages)) {
            return String.format("不存在code为%s的记录", code);
        }
        if (LanguageEnum.English.value().equalsIgnoreCase(language)) {
            return apiMessages.get(0).split(SplitEnum.API_MESSAGE_SPLIT.value())[2];
        }else {
            return apiMessages.get(0).split(SplitEnum.API_MESSAGE_SPLIT.value())[1];
        }

    }

}

2.4.2 MyNacosProperties.java

package per.lmc.tools2.eureka.config;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.annotation.Configuration;

import java.util.List;

/**
 * @author lmc
 * @Description: TODO Nacos配置映射类
 * @Create 2022-05-29 14:05
 * @version: 1.0
 */
@Configuration
@ConfigurationProperties(prefix = "tools")
@RefreshScope
@Data
public class MyNacosProperties {

    List<String> apiMessages;

}

在nacos中的配置如下所示：

2.5 运行测试

运行服务，访问 http://localhost:9006/eureka-proxy/apiMessages/getAll?language=en，能成功获取到数据

{"1000":"missing parameter","2000":"server internal exception","0000":"operation succeeded"}

三，将该服务引入eureka注册中心

上面服务实际上已经注册到eureka注册中心中，但是，实际上使用中，我们都是通过网关访问的，所以在网关服务的application.yml中，补充下该服务的路由

server:
  port: 8764
  servlet:
    context-path: /lmc

spring:
  application:
    name: tools-gateway
  profiles:
    active: dev
  cloud:
    # 消息总线
    bus:
      trace:
        enabled: true
    # 网关配置
    gateway:
      discovery:
        locator:
          enabled: true # 开启根据注册中心路由，并随服务的改变而改变路由
          lower-case-service-id: true # 开启服务名转为小写
#        globalcors:
#        default-filters:
#        - PreserveHostHeader #发送原主机头
      routes:
        - id: tools-task
          uri: lb://tools-task
#          uri: http://localhost:8083
          predicates:
            - Path=/tltk/**
        - id: tools-admin
          uri: lb://tools-admin
          predicates:
            - Path=/monitor/**
          filters:
            - PreserveHostHeader #发送网关原始主机头
        - id: tools-demo
          uri: lb://tools-demo
          predicates:
            - Path=/demo/**
        - id: tools-eureka-proxy
          uri: lb://tools-eureka-proxy
          predicates:
            - Path=/eureka-proxy/**

eureka:
  client:
    registry-fetch-interval-seconds: 10
  instance:
    instance-id: ${spring.application.name}:${spring.cloud.client.ip-address}:${server.port} # 实例名：application:ip:port
    prefer-ip-address: true # 优先使用IP地址作为主机名的标识
    lease-renewal-interval-in-seconds: 180 # 续约更新时间间隔
    lease-expiration-duration-in-seconds: 200
    #  项目配置有 server.servlet.context-path 属性，想要被 spring boot admin 监控，就要配置以下属性
    health-check-url: http://${spring.cloud.client.ip-address}:${server.port}/actuator/health

# 暴露监控断点
management:
  endpoints:
    web:
      exposure:
        include: "*"
      health:
        show-details: always

logging:
  pattern:
    console: "%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{50} - %msg%n"
    file: "%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{50} - %msg%n"

然后重启网关服务，访问 http://localhost:8764/eureka-proxy/apiMessages/getAll，得到

{"1000":"缺少参数","2000":"服务器内部异常","0000":"操作成功"}

因此，eureka成功从nacos获取数据。