Java多用戶商城系統B2B2C源碼 （七）高可用的分佈式配置中心(Spring Cloud Config)

講述了一個服務如何從配置中心讀取文件，配置中心如何從遠程git讀取配置文件，當服務實例不少時，都從配置中心讀取文件，這時能夠考慮將配置中心作成一個微服務，將其集羣化，從而達到高可用，架構圖以下：

1、準備工做

繼續使用上一篇文章的工程，建立一個eureka-server工程，用做服務註冊中心。

在其pom.xml文件引入Eureka的起步依賴spring-cloud-starter-eureka-server，代碼以下:

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<?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>com.forezp</groupId> <artifactId>eureka-server</artifactId> <version> 0.0 . 1 -SNAPSHOT</version> <packaging>jar</packaging> <name>eureka-server</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version> 1.5 . 2 .RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF- 8 </project.build.sourceEncoding> <project.reporting.outputEncoding>UTF- 8 </project.reporting.outputEncoding> <java.version> 1.8 </java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </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>Dalston.RC1</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> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https: //repo.spring.io/milestone</url> <snapshots> <enabled> false </enabled> </snapshots> </repository> </repositories> </project>

　　

在配置文件application.yml上，指定服務端口爲8889，加上做爲服務註冊中心的基本配置，代碼以下：複製代碼

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server: port: 8889 eureka: instance: hostname: localhost client: registerWithEureka: false fetchRegistry: false serviceUrl: defaultZone: http: //${eureka.instance.hostname}:${server.port}/eureka/

　　入口類：

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@EnableEurekaServer @SpringBootApplication public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication. class , args); } }

　　

2、改造config-server

在其pom.xml文件加上EurekaClient的起步依賴spring-cloud-starter-eureka，代碼以下:

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<dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> </dependencies>

　　配置文件application.yml，指定服務註冊地址爲http://localhost:8889/eureka/，其餘配置同上一篇文章，完整的配置以下：

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spring.application.name=config-server server.port= 8888 spring.cloud.config.server.git.uri=https: //github.com/forezp/SpringcloudConfig/ spring.cloud.config.server.git.searchPaths=respo spring.cloud.config.label=master spring.cloud.config.server.git.username= your username spring.cloud.config.server.git.password= your password eureka.client.serviceUrl.defaultZone=http: //localhost:8889/eureka/

　　

最後須要在程序的啓動類Application加上@EnableEureka的註解。

3、改造config-client

將其註冊微到服務註冊中心，做爲Eureka客戶端，須要pom文件加上起步依賴spring-cloud-starter-eureka，代碼以下：

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<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency>

　　

配置文件bootstrap.properties，注意是bootstrap。加上服務註冊地址爲http://localhost:8889/eureka/

複製代碼

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spring.application.name=config-client spring.cloud.config.label=master spring.cloud.config.profile=dev #spring.cloud.config.uri= http: //localhost:8888/ eureka.client.serviceUrl.defaultZone=http: //localhost:8889/eureka/ spring.cloud.config.discovery.enabled= true spring.cloud.config.discovery.serviceId=config-server server.port= 8881

　　架構代碼以下:

資料和源碼來源地址

Spring Cloud大型企業分佈式微服務雲架構源碼請加企鵝求求：一七九一七四三三八零