Spring Cloud Config

1、配置中心将需要用到的配置统一放在git或svn仓库中，通过Cloud的服务获取配置，初始化到各自的应用中

2、配置Config-Server，以git为例

①配置用于存放配置文件的git仓库

指定存储库以及配置文件夹地址

如图，将配置文件放在git仓库config-repo的cloud-config文件夹下，四套配置文件分别放置一个参数设置用于测试

trison-config-dev.properties

env=dev

trison-config-ga.properties

env=ga

trison-config-st.properties

env=st

trison-config-uat.properties

env=uat

②应用配置

pom.xml配置

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.3.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
    </dependencies>

applicaition.properties

server.port=8099

spring.application.name=spring-cloud-config-server
[e-mail]:trisonTestGit/config-repo.git
spring.cloud.config.server.git.search-paths=cloud-config
spring.cloud.config.server.git.username=
spring.cloud.config.server.git.password=

ConfigServerApplication.java

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

3、启动服务，查看应用读取配置情况

仓库中的配置文件会被转换成web接口，访问可以参照以下的规则：

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

其中label代表分支名称

4、Config-Client配置

pom.xml

 <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.3.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <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>

application.properties

spring.application.name=spring-cloud-config-client
server.port=8098

bootstrap.properties

spring.cloud.config.name=trison-config
spring.cloud.config.profile=dev
spring.cloud.config.uri=http://localhost:8099/
spring.cloud.config.label=master

特别注意：上面这些与spring-cloud相关的属性必须配置在bootstrap.properties中，config部分内容才能被正确加载。因为config的相关配置会先于application.properties，而bootstrap.properties的加载也是先于application.properties。

ConfigClientApplication.java

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

ConfigClientController.java

@RestController
public class ConfigClientController {

    @Value("${env}")
    private String env;

    @RequestMapping("/env")
    public String env() {
        return this.env;
    }
}

启动应用访问