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SpringCloud 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-proxyspring:
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: trueeureka:
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; /** * @Description: TODO * @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; /** * @Description: TODO API返回参数接口 * @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; /** * @Description: TODO Nacos配置映射类 * @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: /lmcspring:
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: alwayslogging:
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。
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