springcloud-Distributed Configuration Center (config)

Brief introduction

In the Distributed file system, because of the large number of services, in order to facilitate the unified management of service profiles, real-time updates, so the need for distributed configuration Center components. In spring cloud, there is a distributed Configuration center component, Spring Cloud Config, which enables configuration services to be placed in the memory of the configuration service (that is, local) and also in a remote Git repository. In the Spring Cloud Config component, there are two roles, one is config server, but the config client.

Project Building

Create a springboot project named Config-server

Pom as follows

<?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. springcloud</groupid><artifactid>config-server</artifactid><version>0.0.1-snapshot< /version><packaging>jar</packaging><name>config-server</name><description> Config-server-desc</description><parent><groupid>org.springframework.boot</groupid> <artifactId>spring-boot-starter-parent</artifactId><version>1.5.13.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><spring-cloud.version>edgware.sr3</ Spring-cloud.version></properties><dependencies><dependency><groupid> org.springframework.cloud</groupid><artifactid>spring-cloud-config-server</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></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>

At the entrance of the program application class plus the @enableconfigserver annotation opens the function of the configuration server, the code is as follows

@EnableConfigServer @springbootapplicationpublic class Configserverapplication {public static void main (string[] args) {Springapplication.run (configserverapplication.class, args);}}

The configuration file of the program Application.yml file is configured as follows

server:port:8888spring:application:name:config-servercloud:config:server:git:uri:https://github.com/enzofeng/ Springcloudconfig.gitsearch-paths:respousername:enzofengpassword: *******label:master

Spring.cloud.config.server.git.uri: Configuring the Git repository address
Spring.cloud.config.server.git.searchPaths: Configuring the Warehouse Path
Spring.cloud.config.label: Configuring a branch of a warehouse
Spring.cloud.config.server.git.username: User name to access the GIT repository
Spring.cloud.config.server.git.password: Access passwords for Git repositories

If the GIT repository is a public repository, you can not fill in the user name and password, if it is a private warehouse need to fill

Add a new configuration file to git in the following

Foo=foo version 3

Launch program, Access Http://localhost:8888/foo/dev

{"Name": "foo", "Profiles": ["Dev"], "label": null, "Version": "7e84320106fd4750fa1079934ee6cb88d46e9eb0", "state": NULL, "Propertysources": []}

Certificate Configuration Service Center can obtain configuration information from remote Programs
The HTTP request address and resource file mappings are as follows

/{application}/{profile}[/{label}]/{application}-{profile}.yml/{label}/{application}-{profile}.yml/{ Application}-{profile}.properties/{label}/{application}-{profile}.properties

Building a config Client

Pom as follows

<?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. springcloud</groupid><artifactid>config-client</artifactid><version>0.0.1-snapshot< /version><packaging>jar</packaging><name>config-client</name><description> Config-client-desc</description><parent><groupid>org.springframework.boot</groupid> <artifactId>spring-boot-starter-parent</artifactId><version>1.5.13.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><spring-cloud.version>edgware.sr3</ Spring-cloud.version></properties><dependencies><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.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>

The configuration file is as follows

Spring:application:name:config-clientcloud:config:label:masterprofile:devuri:http://localhost:8888/server:port : 8881

Spring.cloud.config.label: Indicates the branch of the remote repository
Spring.cloud.config.profile
Dev Development environment configuration file
Test environment configuration file
Pro Official Environment configuration file
spring.cloud.config.uri=http://localhost:8888/Specify the URL of the Configuration service center
The entry class of the program, write an API interface "/hi", return the value of the Foo variable read from the configuration center, the code is as follows

@RestController @springbootapplicationpublic class Configclientapplication {public static void main (string[] args) { Springapplication.run (Configclientapplication.class, args);} @Value ("${foo}") string foo; @RequestMapping ("/hi") Public String Hi () {return foo;}}

Start Project, request Http://localhost:8881/hi

Description Config-client Gets the properties of Foo from Config-server, and Config-server is read from the Git repository

Springcloud-Distributed Configuration Center (config)