nacos配置中心

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1、spring boot的配置文件

一般情况下在application.yml或application.properties中配置项目的配置信息。

除了application的配置文件,还有一个bootstrap的配置文件,bootstrap由父ApplicationContext加载,在application之前被加载,且属性不能被覆盖,主要用于从额外的资源加载配置信息。

使用配置中心,需要在bootstrap文件中配置spring.application.name和配置中心的相关配置,以便于从配置中心获取配置信息。

2、pom引入

<?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>cn.com.wenyl.alibaba</groupId> <artifactId>consumer</artifactId> <version>1.0-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.SR1</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>0.2.2.RELEASE</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.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.2</version> <optional>true</optional> </dependency> </dependencies> </project>

3、nacos新增配置

image.png

新增后发布配置

3.1、data id规则

data id=${spring.cloud.nacos.config.prefix}-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}
${spring.cloud.nacos.config.prefix}默认=${spring.application.name}
${spring.profiles.active}为空则 data id=${spring.cloud.nacos.config.prefix}.${spring.cloud.nacos.config.file-extension}

4、bootstrap.yml

按照上面的规则我们得知,项目加载DEFAULT_GROUP组下的service-consumer-dev.yml配置文件

server: port: 8080 spring: profiles: active: dev application: name: service-consumer cloud: nacos: discovery: server-addr: 127.0.0.1:8848 config: server-addr: 127.0.0.1:8848 group: DEFAULT_GROUP file-extension: yml

5、application.yml

server: port: 8080 management: endpoints: web: exposure: include: '*'

6、读取nacos配置

/** * @author Mr.Wen * @version 1.0 * @date 2021-09-09 15:49 */ @Component @RefreshScope public class ConfigProperties { @Value("${service.provider.name}") private String serviceProviderName; String getServiceProviderName(){ return this.serviceProviderName; } }

如此就实现了从配置中心读取数据,使用@RefreshScope,配置中心修改配置后,项目的配置也会修改


标题:nacos配置中心
作者:wenyl
地址:http://www.wenyoulong.com/articles/2021/09/09/1631175873768.html