Eureka服务治理 - 搭建简单应用

创建Eureka注册中心服务器

关键依赖：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.9.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
</properties>

<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>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

yml配置文件： 

server:
  port: 9100  #端口号

eureka:
  instance:
    hostname: localhost #注册中心地址
  client:
    register-with-eureka: false #是否将自己注册到注册中心
    fetch-registry: false #是否从注册中心检索服务
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

在启动类中使用@EnableEurekaServer注解开启注册中心服务：

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

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

}

启动应用在浏览器访问http://localhost:8100：

注册服务

创建一个用户服务app-user，注册到Eureka注册中心。

关键依赖：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.9.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
</properties>

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

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

yml配置文件：

server:
  port: 8010

spring:
  application:
    name: app-user  #服务别名-注册到注册中心之后的名称

eureka:
  client:
    register-with-eureka: true  #注册到注册中心
    fetch-registry: true  #检索其他服务
    serviceUrl:
      defaultZone: http://localhost:9100/eureka/  #注册目标地址

在启动类中使用@EnableEurekaClient将用户服务注册到Eureka注册中心：

@SpringBootApplication
@EnableEurekaClient
public class UserServerApplication {

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

}

再次打开注册中心页面http://localhost:8100，就可以看到app-user服务已经被注册进来了