微服務SpringCloud之Spring Cloud Config配置中心服務化
阿新 • • 發佈：2019-08-26
在前面兩篇Spring Cloud Config配置中心的部落格中都是需要指定配置服務的地址url：spring.cloud.config.uri，客戶端都是直接呼叫配置中心的server端來獲取配置檔案資訊。如果server端要做叢集，客戶端只能通過原始的方式來路由，server端改變IP地址的時候，客戶端也需要修改配置，不符合springcloud服務治理的理念。springcloud提供了這樣的解決方案，我們只需要將server端當做一個服務註冊到eureka中，client端去eureka中去獲取配置中心server端的服務既可。
一、Server端改造
1.新增依賴
在SpringCloudConfigServer專案中，新增spring-cloud-starter-netflix-eureka-client引用。
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
View Code
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>SpringCloudConfigServer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringCloudConfigServer</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR2</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</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>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>2.增加了eureka註冊中心的配置
在application.properties中增加eureka註冊中心的配置，http://localhost:8088是後面啟動的eureka server的地址
eureka.client.serviceUrl.defaultZone=http://localhost:8088/eureka/
3.增加註解
在main方法中增加@EnableDiscoveryClient註解
二、客戶端改造
1、新增依賴
也是引入spring-cloud-starter-netflix-eureka-client。
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency><?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>SpringCloudConfigClient</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringCloudConfigClient</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR2</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</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>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
View Code
2.配置檔案
在bootstrap.properties中去掉指定配置服務的地址url，增加了最後的三個配置：
spring.cloud.config.name=neo-config spring.cloud.config.profile=dev spring.cloud.config.label= spring.cloud.config.discovery.enabled=true spring.cloud.config.discovery.serviceId=spring-cloud-config-server eureka.client.serviceUrl.defaultZone=http://localhost:8088/eureka/
spring.cloud.config.discovery.enabled ：開啟Config服務發現支援
spring.cloud.config.discovery.serviceId ：指定server端的name,也就是server端spring.application.name的值
eureka.client.serviceUrl.defaultZone ：指向註冊中心的地址
3.啟動類增加註解
在main方法中增加註解@EnableDiscoveryClient。
三、測試
1.分別啟動eureka server、SpringCloudConfigServer、SpringCloudConfigClient。
2.瀏覽器輸入http://localhost:8088/，可以看到注入到eureka server中的服務。
3.輸入http://localhost:8001/neo-config/dev，可以看到配置檔案的配置資訊。
4.輸入http://localhost:8002/hello，可以讀取到配置檔案的屬性資訊
參考：http://www.ityouknow.com/springcloud/2017/05/25/springcloud-config-eureka.