Spring Cloud 实战七：分布式配置

一、创建配置中心

1、依赖：

<?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.hx.demo</groupId>
    <artifactId>service-config</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>service-config</name>
    <description>Demo project for Spring Boot</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>

2、配置：

server:
  port: 8888
spring:
  application:
    name: service-config
  cloud:
    config:
      server:
        git:
          uri: https://github.com/houxi1234/demo/
          searchPaths: respo
          username:
          password:
      label: master
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:9000/eureka/

3、启动项配置

@SpringBootApplication
@EnableConfigServer
public class ServiceUserApplication {

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


}

4、gihub文件添加

Spring Cloud 实战七：分布式配置

5、启动后访问：http://localhost:8888/config-client/dev

响应数据为JSON格式，如下图读取到了配置信息，配置中心搭建成功

Spring Cloud 实战七：分布式配置

二、创建客户端

1、依赖

<?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.hx.demo</groupId>
    <artifactId>client-config</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>client-config</name>
    <description>Demo project for Spring Boot</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.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-config-server</artifactId>
        </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>${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>

2、配置：

注意这里配置文件应该用：bootstrap.yml

特别注意：github中配置文件命名需要遵循以下规则

http请求地址和资源文件映射如下:

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

配置信息：特别注意，这里配置出错服务启动会报错找不到配置文件信息

spring.application.name 服务名称一定和github上相对应

如：github上配置文件名为：config-client-dev.properties

那么：spring.application.name=config-client

spring.cloud.config.label 指明远程仓库的分支

spring.cloud.config.profile

dev开发环境配置文件
test测试环境
pro正式环境

spring.cloud.config.uri= http://localhost:8888/ 指明配置服务中心的网址。

Spring Cloud 实战七：分布式配置

具体配置如下

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:9000/eureka/
server:
  port: 9007
spring:
  application:
    name: config-client
  cloud:
    config:
      label: master
      profile: dev
      uri: http://localhost:8888/

因为服务已经注册：所以使用以下配置最优

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:9000/eureka/
server:
  port: 9007
spring:
  application:
    name: config-client
  cloud:
    config:
      profile: dev
      discovery:
        enabled: true
        serviceId: service-config

3、启动项

@SpringBootApplication
@EnableEurekaClient
public class ServiceUserApplication {

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

4、添加接口

@RestController
@RequestMapping("/user/")
@RefreshScope
public class UserController {

    @Value("${username}")
    private String name;

    @RequestMapping("sayHello")
    public String getUser(@RequestBody String say){
        String result = say + " hi " + name;
        System.out.println(result);
        return result;
    }
}

5、访问：

Spring Cloud 实战七：分布式配置

到此，完成了一个简单的配置读取demo

如要实现配置动态改变，还需要配置使用消息总线(Spring Cloud Bus)技术。

最后：github地址：https://github.com/houxi1234/demo.git

Spring Cloud 实战七：分布式配置

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