spring cloud（一）服务注册与发现 Eureka||Consul

深藏阁楼爱情的钟 2022-03-15 07:08 179阅读 0赞

# 本系列文章均参考：[朝雨忆轻尘][Link 1]，感谢博主！ #

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# Spring Cloud Eureka #

## server: ##

pom.xml:

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

通过`@EnableEurekaServer`注解启动一个服务注册中心

@EnableEurekaServer
    @SpringBootApplication
    public class Application {
    
        public static void main(String[] args) {
            SpringApplication.run(Application.class,args);
        }
    }

application.yml:

server:
      port: 8888
    eureka:
      server:
        #开启自我保护
        enable-self-preservation: true
      instance:
        #以IP地址注册
        preferIpAddress: true
        hostname: ${spring.cloud.client.ipAddress}
        instanceId: ${spring.cloud.client.ipAddress}:${server.port}
      client:
        registerWithEureka: false
        fetchRegistry: false
        serviceUrl:
          defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

## client: ##

pom.xml:

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

应用主类中通过加上@EnableEurekaClient注解，启用服务发现（@EnableDiscoveryClient亦可）：

@EnableEurekaClient
    //@EnableDiscoveryClient
    @SpringBootApplication
    public class Application {
        public static void main(String[] args) {
            SpringApplication.run(Application.class,args);
        }
    }

application.yml:

eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8888/eureka/

地址对应即可。

# Spring Cloud Consul #

## server： ##

consul服务器安装详见我其他博客：[传送门][Link 2]

## client： ##

pom.xml:

<dependency>
    	<groupId>org.springframework.cloud</groupId>
    	<artifactId>spring-cloud-starter-consul-discovery</artifactId>
    </dependency>

应用主类中通过加上@EnableDiscoveryClient注解，启用服务发现：

@EnableDiscoveryClient
    @SpringBootApplication
    public class Application {
        public static void main(String[] args) {
            SpringApplication.run(Application.class,args);
        }
    }

application.yml:

spring:
      application:
        name: applicationName
      cloud:
        consul:
          host: localhost
          port: 8500
          discovery:
            serviceName: ${spring.application.name} # 注册到consul的服务名称

# 集群： #

### Eureka集群就是开启多个Eureka微服务，之间互相注册即可。然后客户端的配置defaultZone指定一个到多个都行：[传送门][Link 3] ###

### consul集群也类似，开启多个consul服务（当然与单机开启命令不一样），然后服务之间通过join命令来开启一个集群：[传送门][Link 4] ###

好，告辞~

[Link 1]: https://www.cnblogs.com/xifengxiaoma/
[Link 2]: https://blog.csdn.net/qq_21454973/article/details/83897579
[Link 3]: https://www.cnblogs.com/xiaojunbo/p/7094117.html
[Link 4]: https://blog.csdn.net/chenchong08/article/details/77885989