Nacos作为服务注册中心&配置中心实战

一、前言：

      在学习springcloud框架时，Eureka作为注册中心，config 作为配置中心，当我们在git上面配置相关配置信息，如果想要把配置信息立马同步到各个服务系统，我们需要借助actuator  手工触发更新。

     今天我们来学习一下nacos作为服务注册中心，配置中心的具体实战；

 

二、源码分享：

1、代码：

package com.jason.testnacos.control;

import com.alibaba.nacos.api.config.annotation.NacosConfigurationProperties;
import com.alibaba.nacos.api.config.annotation.NacosValue;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @program: testnacos
 * @description
 * @author: 大龄程序猿
 * @create: 2020-08-29 16:59
 **/
@RefreshScope//spring的注解，表示当前的属性，需要动态刷新
//@NacosConfigurationProperties(dataId = "test",autoRefreshed =true)
@RestController
public class NacosControl {

    //@NacosValue(value="${info.defaultvalue}",autoRefreshed = true)
    @Value("${info:hello Jason}") //info默认值
    private String info;

    @RequestMapping("/say")
    public String sayHello()
    {
        return  info;
    }
}

2、pom.xml配置

 

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.jason</groupId>
    <artifactId>testnacos</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>testnacos</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.0.RELEASE</spring-boot.version>
        <spring-cloud-alibaba.version>2.2.1.RELEASE</spring-cloud-alibaba.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.7</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-dubbo</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>com.alibaba.nacos</groupId>
                <artifactId>nacos-client</artifactId>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.0.RELEASE</version>
                <configuration>
                    <mainClass>com.jason.testnacos.TestnacosApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

 3、配置文件：

 

      bootstrap.yml   配置中心的配置，需要写在这里：

spring:
  cloud:
    nacos:
      config:
        server-addr: 192.168.213.102:8848

      application.properties

spring.application.name=testnacos

dubbo.scan.base-packages=com.jason.testnacos

dubbo.protocol.id=dubbo
dubbo.protocol.name=dubbo
dubbo.protocol.port=-1

dubbo.registry.address=spring-cloud://localhost

dubbo.cloud.subscribed-services=testnacos
spring.cloud.nacos.discovery.server-addr=192.168.213.102:8848

 4、nacos配置：

 

 5、观察配置是否生效：

 

6、nacos作为服务注册中心：