I. Introduction
In a distributed system, due to the huge number of multi-service, service profile in order to facilitate unified management, real-time updates, so they need the central component of a distributed configuration. In Spring Cloud, there is a central component of a distributed configuration spring cloud config, which supports the configuration service in memory configuration services (ie local), also supported on the remote Git repository. Learn springcloud architecture can be added to beg: 3536247259, in the spring cloud config assembly, the two roles, one config server, the second is config client.
Second, build Config Server
parent maven project omitted, the parent pom file:
<?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>sc-f-chapter6</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<modules>
<module>config-server</module>
<module>config-client</module>
</modules>
<name>sc-f-chapter6</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/>
</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>Finchley.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<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>
Create a spring-boot program, named config-server, which pom.xml 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.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>com.forezp</groupId>
<artifactId>sc-f-chapter6</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<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>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Application programs such inlet coupled @EnableConfigServer comment open configuration server functions, as follows:
@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServerApplication.class, args);
}
}
Needs to be configured in the configuration file application.properties file the following procedures:
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=
spring.cloud.config.server.git.password=
spring.cloud.config.server.git.uri: Configure git repository Address
spring.cloud.config.server.git.searchPaths: Configuration depot_path
spring.cloud.config.label: branched configuration repository
spring.cloud.config.server .git.username: access git repository username
spring.cloud.config.server.git.password: user access git repository password
if Git repository as a public warehouse, can not fill in username and password, if it is required to fill in a private warehouse, this example is an open warehouse, ease of use.
There is a remote repository https://github.com/forezp/SpringcloudConfig/ file config-client-dev.properties file has a property:
foo = foo version 3
Start program: Visit http: // localhost: 8888 / foo / dev
{"name":"foo","profiles":["dev"],"label":"master",
"version":"792ffc77c03f4b138d28e89b576900ac5e01a44b","state":null,"propertySources":[]}
Proof configuration service center can obtain configuration information from a remote program.
http request address mapping and resource files as follows:
/ {file application} / {Profile} [/ label {}]
/{application}-{profile}.yml
/{label}/{application}-{profile}.yml
/{application}-{profile}.properties
/ { label} / {application} - { profile} .properties
Third, build a config client
Re-create a springboot project, named config-client, their pom file:
<?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-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>config-client</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>com.forezp</groupId>
<artifactId>sc-f-chapter6</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<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>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Its configuration file bootstrap.properties:
spring.application.name=config-client
spring.cloud.config.label=master
spring.cloud.config.profile=dev
spring.cloud.config.uri= http://localhost:8888/
server.port=8881
spring.cloud.config.label specified branch of a remote repository
spring.cloud.config.profile
dev development environment profile
test test environment
pro formal environment
spring.cloud.config.uri = HTTP: // localhost: 8888 / specify URL configuration service center.
Class program entry, a write API interface "/ hi", the return value of the variable foo read from the configuration center, as follows:
@SpringBootApplication
@RestController
public class ConfigClientApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigClientApplication.class, args);
}
@Value("${foo}")
String foo;
@RequestMapping(value = "/hi")
public String hi(){
return foo;
}
}
Open access Web site: HTTP: // localhost: 8881 / hi, web page display :
foo version 3
This indicates, config-client acquired from the attribute foo config-server, and is read from the config-server git repository, as:
