Springcloud Tutorial VII: Highly Available Distributed Configuration Center (Springcloud Config)

In the previous article we described a service how to read a file from the configuration center, configuration Center How to read the configuration file from remote git, when a lot of service instances, all the files from the configuration center, you can consider the configuration center as a micro-service, clustering it to achieve high availability, the frame composition is as follows:

1: Create a new Eureka Server project, named Config-eureka-server, as the registry for the Configuration service. The pom file is 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.spri Ngcloud</groupid> <artifactId>config-eureka-server</artifactId> <version>0.0.1-snapshot& lt;/version> <packaging>jar</packaging> <name>config-eureka-server</name> <desc Ription>demo Project for Spring boot</description> <parent> <groupid>org.springframework .boot</groupid> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9 .

    Release</version> <relativePath/> <!--lookup parent from repository to </parent> <properties> &LT;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.RELEASE</spring-cloud.version> </properties> <dependencies> <dependency&
            Gt <groupId>org.springframework.cloud</groupId> <artifactid>spring-cloud-starter-eureka-server& Lt;/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</artif Actid> <version>${spring-cloud.version}</version> <type>pom</type&
                Gt <scope>import</scope> </dependency> </dependencies> </dependencymanagem ent> <build> <plugins> <plugin> <groupid>org.springfra Mework.boot</groupid> <artifactId>spring-boot-maven-plugin</artifactId> <
 /plugin> </plugins> </build> </project>

The entry class joins the corresponding annotations:

@EnableEurekaServer
@SpringBootApplication Public
class Configeurekaserverapplication {public

    static void Main (string[] args) {

        springapplication.run (configeurekaserverapplication.class, args);
    }
}

Modify the configuration file as follows:

server.port=8889
eureka.instance.hostname=localhost
#配置成服务
eureka.client.registerwitheureka= false
eureka.client.fetchregistry=false
eureka.client.service-url.defaultzone= http://${ eureka.instance.hostname}:${server.port}/eureka/

2: Modify the previous Config-server project
Add the required dependencies in the POM;

    <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId> spring-cloud-starter-eureka</artifactid>
        </dependency>
        <dependency>
            <groupid >org.springframework.cloud</groupId>
            <artifactid>spring-cloud-config-server</artifactid >
        </dependency>

To modify a configuration file:

Spring.application.name=config-server
server.port=8888


#配置文件在本地
#spring. profiles.active=native
#配置文件的目录
#spring. cloud.config.server.native.search-locations=d:/workspace/github/spring-config/ Config-file

#spring. cloud.config.server.git.uri=https://github.com/forezp/springcloudconfig/
Spring.cloud.config.server.git.uri=https://github.com/iot-wangshuyu/springcloud
#配置仓库路径
spring.cloud.config.server.git.searchpaths=springcloudconfig/respo/
#配置仓库的分支
Spring.cloud.config.label=master
#访问git仓库的用户名
spring.cloud.config.server.git.username=
# User password to access git repository
spring.cloud.config.server.git.password=
#注册服务地址
eureka.client.service-url.defaultzone=http://localhost:8889/eureka/

To modify the Startup class:

@SpringBootApplication
@EnableConfigServer
@EnableEurekaClient Public
class configserverapplication {public

    static void Main (string[] args) {

        Springapplication.run ( Configserverapplication.class, args);
    }
}

3: Modify the Config-client project

Add the appropriate dependencies in the POM:

<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>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>

Modifying the profile name is called: bootstrap.properties
Content modified to:

#服务名称
spring.application.name=config-client
#仓库分支
spring.cloud.config.label=master
# Dev development Environment Profile
#test测试环境
#pro正式环境
spring.cloud.config.profile=dev
#使用eureka Server needs to be commented out
# spring.cloud.config.uri= http://localhost:8888/

#服务注册地址
eureka.client.service-url.defaultzone=http:// localhost:8889/eureka/
#从远程获取配置文件
spring.cloud.config.discovery.enabled=true
#订阅的服务名称
Spring.cloud.config.discovery.service-id=config-server
server.port=8881

If the configuration service deploys multiple copies, it is highly available through load balancing.
Start the program in turn, config-eureka-server,config-server,config-client, browser access: http://localhost:8889/can view the service registration situation;
Browser access: Http://localhost:8881/hi; returns the Foo attribute in the configuration file;
Description of the highly available distributed Configuration Center configuration succeeded