Spring Cloud -- 配置Eureka注册中心,注册服务

1.配置Eureka注册中心:

1) 首先在工程中创建一个模块(Module),用于创建Eureka注册中心,这里命名为eureka-server:

2) 然后,引入依赖(可以借助spring初始化器引入cloud service):

<!-- 指定springcloud版本 -->
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Edgware.SR5</spring-cloud.version>
</properties>

<!-- 服务提供者 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>

<!-- 配置使用springcloud -->
<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>

3) 配置Eureka注册中心:

# 注册中心的端口号
server:
port: 8761

# 注册中心的ip
eureka:
instance:
hostname: localhost

client:
# 检索服务选项，当设置为True(默认值)时，会进行服务检索,注册中心不负责检索服务
register-with-eureka: false
# 服务注册中心也会将自己作为客户端来尝试注册自己,为true（默认）时自动生效
fetch-registry: false
service-url:
# 重点!配置注册中心的地址
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

4)开启注册中心并运行:

package com.id0304.eurekaserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableEurekaServer		//创建注册中心
@SpringBootApplication
public class EurekaServerApplication {

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

}

5) 进入注册中心:

2.注册服务提供者:

1) 引入依赖:

<!-- 服务提供者-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>

<!-- Eureka客户端配置,注册提供者要加  -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>

当然别忘了配置springcloud:

<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Edgware.SR5</spring-cloud.version>
</properties>

<!-- 配置使用springcloud -->
<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>

2) 配置服务提供者:

spring:
application:
name: dictionary		# 配置提供者的名称

server:
port: 8081		# 这里配置服务提供者的端口

eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/		# 注意,这里的地址是注册中心的地址

3) 注册并启动服务提供者

package com.id0304.dictionary;

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

@SpringBootApplication
@EnableDiscoveryClient        //注册该服务进Eureka,成为服务提供者
public class DictionaryApplication {
public static void main(String[] args) {
SpringApplication.run(DictionaryApplication.class, args);
}
}

4) 查看注册中心:

注册中心就会多出一个服务

附上Eureka服务端,Eureka生产者客户端配置文件和依赖:

Eureka服务端:

<!-- spring boot begin -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>2.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- spring boot end -->

<!-- spring cloud begin-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-netflix-eureka-server</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<!-- spring cloud end-->

spring:
application:
name: aweather-eureka

# 注册中心的端口号
server:
port: 8761

# 注册中心的ip
eureka:
instance:
hostname: localhost

client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

@SpringBootApplication
@EnableEurekaServer

Eureka生产者客户端:

<!-- spring boot begin -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>2.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- spring boot end -->

<!-- spring cloud begin-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-netflix-eureka-server</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-netflix-eureka-client</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<!-- spring cloud end-->

eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/

@SpringBootApplication
@EnableEurekaClient