Springboot+Springcloud+Nacos實現註冊中心（二）

版本

• springboot版本：2.5.0
• spring-cloud版本：2020.0.4
• spring-cloud-alibaba版本：2021.1

項目結構

• 父工程：halo-nacos
• 子工程：alibaba-nacos-discovery-client

• 子工程：alibaba-nacos-discovery-server

  
  

父工程 halo-nacos

• 父工程依賴：

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.0</version>
        <relativePath/>
    </parent>
    <groupId>gc</groupId>
    <artifactId>halo-nacos</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>halo-nacos</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2020.0.4</spring-cloud.version>
        <spring-cloud-alibaba.version>2021.1</spring-cloud-alibaba.version>
    </properties>
    <packaging>pom</packaging>
    <modules>
        <module>alibaba-nacos-discovery-server</module>
        <module>alibaba-nacos-discovery-client</module>
    </modules>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <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-discovery</artifactId>
            <version>2.1.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.2</version>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

子工程alibaba-nacos-discovery-server

• 子工程alibaba-nacos-discovery-server依賴

<?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>
    <parent>
        <groupId>gc</groupId>
        <artifactId>halo-nacos</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <groupId>gc</groupId>
    <artifactId>alibaba-nacos-discovery-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>alibaba-nacos-discovery-server</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

• alibaba-nacos-discovery-server 配置文件：

spring:
  application:
    name: alibaba-nacos-discovery-server
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        namespace: b0183db0-0121-4b23-ae28-57a4872eda3f
server:
  port: 8082

• alibaba-nacos-discovery-server 啓動類：

package gc.alibabanacosdiscoveryserver;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@Slf4j
@EnableDiscoveryClient
@SpringBootApplication
public class AlibabaNacosDiscoveryServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(AlibabaNacosDiscoveryServerApplication.class, args);
        log.info("Server啓動成功");
    }
}

• 子工程alibaba-nacos-discovery-client依賴

<?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>
    <parent>
        <groupId>gc</groupId>
        <artifactId>halo-nacos</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <groupId>gc</groupId>
    <artifactId>alibaba-nacos-discovery-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>alibaba-nacos-discovery-client</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

• alibaba-nacos-discovery-client配置文件：

spring:
  application:
    name: alibaba-nacos-discovery-client
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        namespace: b0183db0-0121-4b23-ae28-57a4872eda3f
server:
  port: 8084

• alibaba-nacos-discovery-client啓動類：

package gc.alibabanacosdiscoveryclient;

import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;

@Slf4j
@EnableDiscoveryClient
@SpringBootApplication
public class AlibabaNacosDiscoveryClientApplication {
    public static void main(String[] args) {
        SpringApplication.run(AlibabaNacosDiscoveryClientApplication.class, args);
        log.info("client啓動成功");
    }
}

分別啓動server和client

服務的EndPoint

父工程新增以下依賴，重新啓動項目

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

spring-cloud-starter-alibaba-nacos-discovery 在實現的時候提供了一個EndPoint,EndPoint的訪問地址爲 http://ip:port/actuator/nacos-discovery 。因爲我們加了 spring-boot-starter-actuator 依賴，所以可以查看endpoint信息。EndPoint 的信息主要提供了兩類:

Subscribe: 顯示了當前有哪些服務訂閱者
NacosDiscoveryProperties: 顯示了當前服務實例關於 Nacos 的基礎配置