spring cloud nacos 一 注册与发现实践
spring cloud nacos 注册与发现实践
0.创建maven父工程， pom.xml 如下
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.6.RELEASE
com.sunup
practice
0.0.1-SNAPSHOT
practice
spring cloud practice
UTF-8
UTF-8
1.8
Greenwich.RELEASE
practice-springcloud-nacos-consuer
practice-springcloud-nacos-provider
org.springframework.cloud
spring-cloud-dependencies
${spring-cloud.version}
pom
import
org.springframework.boot
spring-boot-maven-plugin
1.创建两个微服务一个服务提供者practice-springcloud-nacos-provider和一个服务消费者practice-springcloud-nacos-consuer
2.practice-springcloud-nacos-provider服务提供者， pom.xml 如下
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.6.RELEASE
com.sunup
practice-springcloud-nacos-provider
0.0.1-SNAPSHOT
practice-springcloud-nacos-provider
spring cloud nacos server register and find
1.8
org.springframework.cloud
spring-cloud-dependencies
org.springframework.cloud
spring-cloud-starter-alibaba-nacos-discovery
0.9.0.RELEASE
org.springframework.boot
spring-boot-starter
org.springframework.boot
spring-boot-starter-web
org.projectlombok
lombok
1.18.8
provided
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
2.practice-springcloud-nacos-consuer服务消费者，pom.xml 如下
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.6.RELEASE
com.sunup
practice-springcloud-nacos-consuer
0.0.1-SNAPSHOT
practice-springcloud-nacos-consuer
Demo project for Spring Boot
1.8
org.springframework.cloud
spring-cloud-dependencies
org.springframework.cloud
spring-cloud-starter-alibaba-nacos-discovery
0.9.0.RELEASE
org.springframework.cloud
spring-cloud-starter-ribbon
org.springframework.cloud
spring-cloud-starter-openfeign
2.1.2.RELEASE
org.springframework.boot
spring-boot-starter
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
3.配置好pom.xml 之后，在服务提供者启动类里面 加入注解@EnableDiscoveryClient
package com.sunup.practice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@EnableDiscoveryClient
@SpringBootApplication
public class PracticeSpringcloudNacosProviderApplication {
public static void main(String[] args) {
SpringApplication.run(PracticeSpringcloudNacosProviderApplication.class, args);
}
}
4.在服务提供者写一个controller rest 服务
package com.sunup.practice.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
@Slf4j
public class ProviderController {
@GetMapping("/hello")
public String hi(@RequestParam(value = "name", defaultValue = "nacos", required = false) String name) {
log.debug(name);
return "hello" + name;
}
}
5.在消费者启动类加入注解@EnableFeignClients
package com.sunup.practice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@EnableFeignClients
@SpringBootApplication
public class PracticeSpringcloudNacosConsuerApplication {
@LoadBalanced
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
public static void main(String[] args) {
SpringApplication.run(PracticeSpringcloudNacosConsuerApplication.class, args);
}
}
6.在消费者写一个服务提供者的客户端接口
package com.sunup.practice.controller;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
@FeignClient("nacos-provider")
public interface ProviderClient {
@GetMapping("/hello")
String hello(@RequestParam(value = "name",defaultValue = "nacos",required = false)String name);
}
7.在消费者写一个controller rest 服务 并调用服务提供者提供的服务
package com.sunup.practice.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
@RestController
public class ConsumerController {
@Autowired
private RestTemplate restTemplate;
@Autowired
private ProviderClient providerClient;
@GetMapping("/helloFeign")
public String helloFeign(){
return providerClient.hello("feign");
}
@GetMapping("/helloResttemplate")
public String resttemplate(){
return restTemplate.getForObject("http://nacos-provider/hello?name=resttemplate",String.class);
}
}
8.配置服务提供者和消费者的application.yml文件
提供者
server:
port: 8762
# 注意：下面注释了是因为 消费者可能会因为配置了context-path 而调用请求不到提供者的服务
# servlet:
# context-path: /nacos-provider
spring:
application:
name: nacos-provider
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
消费者
server:
port: 8763
# 注意：下面注释了是因为 消费者可能会因为配置了context-path 而调用请求不到提供者的服务
# servlet:
# context-path: /nacos-consuer
spring:
application:
name: nacos-consuer
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
9.下载spring cloud alibaba nacos 服务器
https://github.com/alibaba/nacos/releases 我下载的是1.0.1版
下载完成后需要注意（特别注意：不要解压到带空格的目录下，不然有可能服务不会注册成功）
解压后在bin目录下windows 点击 startup.cmd 运行
启动成功！访问地址为 http://localhost:8848/nacos/
然后访问 http://localhost:8763/helloFeign 得到响应
然后就成功了！源码 https://github.com/sunuping/spring-cloud-nacos