一、簡介
在分散式系統中,由於服務數量巨多,為了方便服務配置檔案統一管理,實時更新,所以需要分散式配置中心元件。在Spring Cloud中,有分散式配置中心元件spring cloud config ,它支援配置服務放在配置服務的記憶體中(即本地),也支援放在遠端Git倉庫中。在spring cloud config 元件中,分兩個角色,一是config server,二是config client。
二、構建Config Server
建立一個spring-boot專案,取名為config-server,其pom.xml:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | <?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>config-server</artifactId> <version> 0.0 . 1 -SNAPSHOT</version> <packaging>jar</packaging> <name>config-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-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> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Camden.SR6</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> |
在程式的入口Application類加上@EnableConfigServer註解開啟配置伺服器的功能,程式碼如下:
1 2 3 4 5 6 7 8 | @SpringBootApplication @EnableConfigServer public class ConfigServerApplication { public static void main(String[] args) { SpringApplication.run(ConfigServerApplication. class , args); } } |
需要在程式的配置檔案application.properties檔案配置以下:
1 2 3 4 5 6 7 8 9 | 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 |
- spring.cloud.config.server.git.uri:配置git倉庫地址
- spring.cloud.config.server.git.searchPaths:配置倉庫路徑
- spring.cloud.config.label:配置倉庫的分支
- spring.cloud.config.server.git.username:訪問git倉庫的使用者名稱
- spring.cloud.config.server.git.password:訪問git倉庫的使用者密碼
如果Git倉庫為公開倉庫,可以不填寫使用者名稱和密碼,如果是私有倉庫需要填寫,本例子是公開倉庫,放心使用。
遠端倉庫github.com/forezp/Spri… 中有個檔案config-client-dev.properties檔案中有一個屬性:
1 | foo = foo version 3 |
啟動程式:訪問http://localhost:8888/foo/dev
1 2 | { "name" : "foo" , "profiles" :[ "dev" ], "label" : "master" , "version" : "792ffc77c03f4b138d28e89b576900ac5e01a44b" , "state" : null , "propertySources" :[]} |
架構程式碼如下:
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