7，springcloud+nacos

一、参考书籍

《Nacos架构&原理》

电子版下载地址：https://developer.aliyun.com/ebook/36

二、搭建nacos服务端

1，nacos官网下载

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

2，解压，修改配置文件，指定nacos连接的数据库配置

nacos/conf/application.properties

3，创建本地数据库，运行nacos初始化的sql

创建application.properties配置名称的数据库，运行nacos/conf/nacos-mysql.sql

4，运行nacos

先使用单机模式运行

cd nacos安装目录\nacos\bin

startup.cmd -m standalone

访问http://localhost:8848/nacos，查看运行效果

三、搭建nacos客户端

以springCloud + nacos为例

1，创建父工程

new project -> maven -> next ... -> finish

删除src目录，只保留pom.xml

指定maven-settings.xml：settings -> 搜索maven，修改相关配置

settings.xml示例如下：
<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  
    <localRepository>E:\frr_repository_nacosdemo</localRepository> 
    <mirrors>
        <mirror>
          <id>alimaven</id>
          <name>aliyun maven</name>
          <url>http://maven.aliyun.com/nexus/content/groups/public</url>
          <mirrorOf>central</mirrorOf>        
        </mirror>
    </mirrors>
</settings>

父工程pom.xml示例如下：
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>nacos-father</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <packaging>pom</packaging>

    <modules>
        <module>待会儿创建的子工程</module>
    </modules>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <spring-cloud.version>2021.0.2</spring-cloud.version>
        <spring-cloud-alibaba.version>2021.1</spring-cloud-alibaba.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <!--Spring Cloud 相关依赖-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!--Spring Cloud & Alibaba 相关依赖-->
            <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>
</project>

2，创建子工程

右击父项目 -> new -> module -> spring initializr -> next ... -> finish

子工程pom.xml示例如下：
<?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.example</groupId>
        <artifactId>nacos-father</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <groupId>com.example</groupId>
    <artifactId>nacos-son-one</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nacos-son-one</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <packaging>jar</packaging>

    <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>

        <!-- Spring Cloud & Alibaba -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>

        <!-- 注册中心 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!-- 配置中心 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

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

3，创建nacos的namespace，在服务端页面

在nacos服务端页面配置的相关信息都是保存在数据库对应的表中。

4，客户端nacos配置

在src-main-resource下新建bootstrap.yml文件：
server:
  port: 8989

spring:
  application:
    # 应用名称
    name: nacos-son-one
  profiles:
    active: test
  cloud:
    nacos:
      discovery:
        server-addr: http://localhost:8848
        namespace: e6f53299-e336-4583-b1b6-d09675d70b49
        username: nacos
        password: nacos
      config:
        server-addr: http://localhost:8848
        namespace: e6f53299-e336-4583-b1b6-d09675d70b49
        username: nacos
        password: nacos
        file-extension: yml
        # 共享配置
        shared-configs:
          - application-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}

其中，discovery是注册中心相关配置，config是配置中心相关配置