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Eureka【入门】

说明
- SpringBoot版本 2.1.7.RELEASE
- SpringCloud版本 Greenwich.SR2

创建eureka server工程

加入pom依赖

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

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR2</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

启动类添加@EnableEurekaServer注解

@EnableEurekaServer
@SpringBootApplication
public class EurekaApplication {

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

}

application.yml文件中添加配置

server:
  port: 8761


spring:
  application:
    name: servers-register


eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
  server:
    wait-time-in-ms-when-sync-empty: 0
    enable-self-preservation: false

注意：这里是单机版配置

创建eureka client工程

加入pom依赖

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

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR2</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

启动类添加@EnableDiscoveryClient注解

@EnableDiscoveryClient
@SpringBootApplication
public class UserServerApplication {

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

}

application.yml添加配置
```
server:
  port: 8081


eureka:
  client:
    service-url:
      defaultZone: 'http://localhost:8761/eureka/'


spring:
  application:
    name: user-server
```
注意：这里的spring. application.name服务自定义名称，如果不定义的话，在eureka server的界面中展示的是UNKNOWN