Nacos快速開始

首頁

https://nacos.io

下載

https://github.com/alibaba/nacos/releases

部署

解壓

tar -zxvf nacos-server-$version.tar.gz

Linux/Unix/Mac

cd nacos/bin
sh startup.sh -m standalone

Windows

#或者直接雙擊startup.cmd
cmd startup.cmd

訪問(初始用戶:nacos/nacos)

http://localhost:8848/nacos

整合SpringBoot Project

SpringBoot Version：2.2.4.RELEASE

pom.xml

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.1.0.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Greenwich.SR2</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    </dependency>
</dependencies>

application.yml

server:
  port: 8080
spring:
  application:
    name: demo-nacos
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

編寫啓動類(@EnableDiscoveryClient註解開啓註冊發現)

/**
 * @author liujiazhong
 */
@EnableDiscoveryClient
@SpringBootApplication
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

啓動項目後，打開Nacos控制檯

配置中心

加入maven引用

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

新增bootstrap.yml配置文件

spring:
  application:
    name: demo-nacos
  cloud:
    nacos:
      config:
        server-addr: 127.0.0.1:8848
        prefix: demo
        file-extension: yml

---
spring:
  profiles: dev
  cloud:
    nacos:
      config:
        namespace: e21a45c0-b269-4427-ae09-c5c355308bb6

---
spring:
  profiles: test
  cloud:
    nacos:
      config:
        namespace: 630177db-9bde-4d03-ad60-0ca2b5724385

編寫需要動態配置的屬性(@RefreshScope註解)

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.cloud.context.config.annotation.RefreshScope;

/**
 * @author liujiazhong
 */
@Data
@RefreshScope
@ConfigurationProperties(prefix = "demo.dynamic")
public class DemoConfig {

    private String notifyUrl = "http://localhost:8085/notify";

}

在啓動類上配置DemoConfig(@EnableConfigurationProperties({DemoConfig.class}))

@EnableConfigurationProperties({DemoConfig.class})
@EnableDiscoveryClient
@SpringBootApplication
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

在Nacos控制檯，新增demo.yml配置文件


測試(http://localhost:8080/demo/print)

import com.liu.demo.config.DemoConfig;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author liujiazhong
 */
@RestController
@RequestMapping("demo")
public class DemoController {

    private final DemoConfig demoConfig;

    public DemoController(DemoConfig demoConfig) {
        this.demoConfig = demoConfig;
    }

    @GetMapping("print")
    public String printNotifyUrl() {
        return demoConfig.getNotifyUrl();
    }

}

補充

Demo目錄結構

總結

Nacos有註冊中心和配置中心兩種角色，可以單獨使用也可以同時使用