2 Nacos提供注册中心（Eureka）+配置中心（Config）

1 Nacos代替Eureka

** Nacos可以直接提供注册中心（Eureka）+配置中心（Config），Nacos本身就是一个小平台，它要比之前的Eureka更加方便，不需要我们在自己做配置。 **

2 Nacos服务注册中心

** 服务发现是微服务架构中的关键组件之一。在这样的架构中，手动为每个客户端配置服务列表可能是一项艰巨的任务，并且使得动态扩展极其困难。Nacos Discovery 帮助您自动将您的服务注册到 Nacos 服务器，Nacos 服务器会跟踪服务并动态刷新服务列表。此外，Nacos Discovery 将服务实例的一些元数据，如主机、端口、健康检查 URL、主页等注册到 Nacos。**

3 引入Nacos Discovery进行服务注册/发现

创建 父工程

父工程 pom

<?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>2.2.13.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.maliqiang</groupId>
    <artifactId>spring-cloud-alibaba-parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-cloud-alibaba-parent</name>
    <description>Demo project for Spring Boot</description>
    <packaging>pom</packaging>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud-alibaba-version>2.2.5.RELEASE</spring-cloud-alibaba-version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <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>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba-version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <modules>
        <module>cloud-alibaba-nacos-provider-9001</module>
    </modules>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

创建 子工程

子工程 pom

<?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>com.maliqiang</groupId>
        <artifactId>spring-cloud-alibaba-parent</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.maliqiang</groupId>
    <artifactId>spring-cloud-alibaba-nacos-provider-9001</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-cloud-alibaba-nacos-provider-9001</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.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-discovery</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

4 创建 application.yml

server:
  port: 9001

spring:
  application:
    name: nacos-provider # 应用程序名称
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.133.135:8848 # Nacos 服务器地址

5 启动类中，添加注解 @EnableDiscoveryClient

6 启动 Nacos

cd /usr/local/nacos/bin/

./startup.sh -m standalone

7 启动spring boot

8 查看 Nacos

注意，在启动项目前一定要启动Nacos