springcloud整合nacos实现服务的注册与发现
首先新建父工程
添加依赖如下:
<dependencies>
<!-- spring-cloud-alibab-dependencies -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba</artifactId>
<version>2.1.0.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- spring-cloud-dependencies -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- spring-boot-dependencies -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.1.3.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
接着新建提供者模块依赖于父工程
依赖如下:
<dependencies>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
</dependencies>
application.yml配置文件如下:
server:
port: 56010
spring:
application:
name: quickstart-provider
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
logging:
level:
root: info
org.springframework: info
新建个controller,使用api测试
package com.ckf.nacos.controller;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author serene
* @date 2020/8/22 16:18
*/
@RestController
public class ProviderController {
private static final Logger logger = LoggerFactory.getLogger(ProviderController.class);
@GetMapping("/service")
public String service(){
logger.info("provider invoke");
return "provider invoke";
}
}
启动类
package com.ckf.nacos;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
/**
* @EnableDiscoveryClient 服务发现客户端
* @EnableFeignClients feign客户端 进行远程调用
* @author: serene
* @date: 2020/8/022 16:26
* @description:
*/
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class ProviderApplication {
public static void main(String[] args) {
System.out.println("服务提供者启动成功");
SpringApplication.run(ProviderApplication.class, args);
}
}
接着新建消费者模块依赖于父工程
新建feign客户端
package com.ckf.nacos.client;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
/**@FeignClient 调用服务的名称 yml配置文件的服务名
* @author serene
* @date 2020/8/22 16:40
*/
@FeignClient(value = "quickstart-provider")
public interface ProviderClient {
/**
* 调用服务的方法
* @return
*/
@GetMapping("/service")
public String service();
}
新建controller
package com.ckf.nacos.controller;
import com.ckf.nacos.client.ProviderClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author serene
* @date 2020/8/22 16:46
*/
@RestController
public class ConsumerController {
private static final Logger logger = LoggerFactory.getLogger(ConsumerController.class);
/**
* 动态代理对象,内部远程调用服务生产者
*/
@Autowired
private ProviderClient providerClient;
@GetMapping("/service")
public String service(){
logger.info("consumer invoke");
//远程调用
String service = providerClient.service();
return "comsumer invoke "+"|"+" + service";
}
}
application.yml配置如下:
server:
port: 56020
spring:
application:
name: quickstart-consumer
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
logging:
level:
root: info
org.springframework: info
服务消费者启动类如下:
package com.ckf.nacos;
import com.ckf.nacos.controller.ConsumerController;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
/**
* @EnableDiscoveryClient 服务发现客户端
* @EnableFeignClients feign客户端 进行远程调用
* @author: serene
* @date: 2020/8/022 16:26
* @description:
*/
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class ConsumerApplication {
private static final Logger logger = LoggerFactory.getLogger(ConsumerController.class);
public static void main(String[] args) {
logger.info("服务消费者启动成功");
System.out.println("服务消费者启动成功");
SpringApplication.run(ConsumerApplication.class, args);
}
}
然后启动nacos,再启动服务提供者,就可以看到服务已经注册上来了。
再启动服务消费者
这样nacos的服务提供者与消费者就完成了,如有需要进行调用就好了。
接下来测试多实例负载均衡
首先以传参的形式定义端口号,这样在启动脚本里可以指定具体的端口号。
修改提供者的yml配置文件
在启动脚本里可以指定端口号(这里创建两个脚本实现多实例,ProviderApplication1 与 ProviderApplication2)
然后启动刚修改的两个脚本,nacos服务列表显示如下:
由此可以看出有两个实例了
然后再启动消费者服务,我们访问消费者的api
每次启动在控制台都是以轮回的方式打印(提供者1与提供者2,也就是我们刚创建的启动脚本)
项目地址:https://gitee.com/ckfeng/nacos-discovery.git
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