Spring Cloud Alibaba 1 nacos搭建

SpringCloudAlibaba
SpringCloud
发布日期:   2022-04-11
文章字数:   1.7k
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Spring Cloud Alibaba 1 nacos搭建

安装启动nacos

  • 下载
  • 解压
    unzip nacos-server-$version.zip 或者 tar -xvf nacos-server-$version.tar.gz
cd nacos/bin
  • 启动
    Linux/Unix/Mac
启动命令(standalone代表着单机模式运行，非集群模式):
sh startup.sh -m standalone

如果您使用的是ubuntu系统，或者运行脚本报错提示[[符号找不到，可尝试如下运行：
bash startup.sh -m standalone

Windows
启动命令(standalone代表着单机模式运行，非集群模式):
startup.cmd -m standalone
  • 控制台
    localhost:8848/nacos/index.html
  • 关闭
    Linux/Unix/Mac
sh shutdown.sh

Windows
shutdown.cmd

编码

启动配置管理

创建项目

  1. 创建父maven项目，配置pom.xml：
    <?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.zzz</groupId>
    <artifactId>zwq-cloud</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <properties>
        <java.version>1.8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <!-- Spring Cloud -->
        <spring.cloud.version>Hoxton.SR12</spring.cloud.version>
    </properties>

    <modules>
        <module>nacos</module>
    </modules>

    <dependencyManagement>
        <dependencies>

            <!-- Spring Dependencies -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.3.3.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <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>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.1.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>
    </dependencyManagement>

</project>
  2. 创建子项目(springboot) nacos，pom.xml：
    <?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.zzz</groupId>
        <artifactId>zwq-cloud</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <groupId>com.zzz</groupId>
    <artifactId>nacos</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nacos</name>
    <description>Demo project for nacos</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>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>

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

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
            <version>3.0.3</version>
        </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>

注：项目需要使用bootstrap.yml作为配置文件(application.properties不生效)，需要添加依赖(上面的artifactId： spring-cloud-starter-bootstrap)

项目结构

nacos创建配置文件

  1. 进入控制台 http://localhost:8848/nacos/index.html
  2. 添加配置文件
    Data Id/Group/内容如下：
pped-ok.yml PPED_GROUP :
user: 
 username: 'zwq3'
 pass: 'zwqzwq3'

pped-1.yml PPED_GROUP :
msg: 
 content: '内容3'
 time: 'today3'

pped.yml PPED_GROUP :
dd:
 content: '默认3'

项目创建配置文件

application.properties:

server.port=18084
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always

bootstrap.yml:

spring:
  application:
    # 服务名
    name: pped
  cloud:
    nacos:
      config:
        # 是否开启配置中心 默认true
        enabled: true
        # 配置中心地址
        server-addr: 127.0.0.1:8848
        # 配置文件后缀
        file-extension: yml
        # 配置对应的分组
        group: PPED_GROUP
        # 命名空间 常用场景之一是不同环境的配置的区分隔离，例如开发测试环境和生产环境的资源（如配置、服务）隔离等
        # namespace: ba42e722-81aa-48f1-9944-9dca57d5f396
        # Nacos 认证用户
        username: nacos
        # Nacos 认证密码
        password: nacos
        # 支持多个共享 Data Id 的配置，优先级小于extension-configs,自定义 Data Id 配置 属性是个集合，内部由 Config POJO 组成。Config 有 3 个属性，分别是 dataId, group 以及 refresh
        shared-configs[0]:
          data-id: pped-ok.yml # 配置文件名-Data Id
          group: PPED_GROUP   # 默认为DEFAULT_GROUP
          refresh: true   # 是否动态刷新，默认为false
        shared-configs[1]:
          data-id: pped-1.yml # 配置文件名-Data Id
          group: PPED_GROUP   # 默认为DEFAULT_GROUP
          refresh: true   # 是否动态刷新，默认为false
        refresh-enabled: true

项目写代码测试是否能获取配置文件内容

TestController:

/**
 * description: 测试
 *
 * @author zwq
 * @date 2022/4/11 15:50
 */
@RestController
@RequiredArgsConstructor
// 刷新配置文件
@RefreshScope
public class TestController {

	private final UserDO userDO;

	private final NacosConfigManager nacosConfigManager;

	private final Environment environment;

	@Value("${msg.content}")
	String content;

	@Value("${msg.time}")
	String time;

	@Value("${dd.content}")
	String dd;

	@Value("${user.username}")
	String userName;

	@Value("${user.pass}")
	String pass;

	@GetMapping("test")
	public String test() {
		StringBuilder stringBuilder = new StringBuilder();
		stringBuilder.append(userName + " ").append(pass + " ");
		stringBuilder.append(content + " ").append(time + " ");
		stringBuilder.append(dd + " ");
		System.out.println(userDO.getUsername() + userDO.getPass());
		System.out.println(nacosConfigManager.getConfigService());
		System.out.println(nacosConfigManager.getNacosConfigProperties());
		System.out.println(environment.getProperty("pped-ok.yml"));
		System.out.println(environment.getProperty("pped-test"));
		return stringBuilder.toString();
	}

}

启动服务发现

  1. 添加依赖
    <dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
  2. 添加配置
    spring:
  application:
    # 服务名
    name: pped
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        group: PPED_GROUP
  3. 启动类增加注解
    @EnableDiscoveryClient
  4. 控制台便能看到服务列表
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