2019-09-08SpringCloud6 分钟读完 (大约 840 个字)

08.3 SpringCloud Config客户端配置

SpringCloud Config客户端配置

1. 创建客户端配置文件

在microservice-config工程中创建 microservicecloud-config-client.yml 文件,并推送到Github私有仓库中

spring:
  profiles:
    active:
      - dev
---
server:
  port: 8201
spring:
  profiles: dev
  application:
    name: microservicecloud-config-client
eureka:
  client:
    service-url:
      defaultZone: http://eureka-dev.com:7001/eureka/
---
server:
  port: 8202
spring:
  profiles: test
  application:
    name: microservicecloud-config-client
eureka:
  client:
    service-url:
      defaultZone: http://eureka-test.com:7001/eureka/

2. 创建客户端工程

2.1 新建microservicecloud-config-client-3355

略

2.2 pom.xml文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.hellodev</groupId>
        <artifactId>atguigu-microservicecloud</artifactId>
        <version>0.0.1</version>
    </parent>
    <artifactId>microservicecloud-config-client-3355</artifactId>
    <version>0.0.1</version>
    <dependencies>
        <dependency><!-- 引入自己定义的 api 通用包，可以使用 Dept 部门Entity -->
            <groupId>com.hellodev</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!-- SpringCloud  Config 客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter- config</artifactId>
        </dependency>
        <!--hystrix-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
        <!-- 将微服务provider侧注册进 eureka  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- actuator监控信息完善 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</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>
        </dependency>
        <!-- 修改后立即生效，热部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>
</project>

2.3 创建bootstrap.yml

applicaiton.yml是用户级的资源配置项
bootstrap.yml是系统级的，优先级更加高
Spring Cloud会创建一个Bootstrap Context，作为Spring应用的Application Context的父上下文。初始化的时候，Bootstrap Context负责从外部源加载配置属性并解析配置。这两个上下文共享一个从外部获取的Environment。Bootstrap属性有高优先级，默认情况下，它们不会被本地配置覆盖。Bootstrap context和Application Context有着不同的约定，
所以新增了一个bootstrap.yml文件，保证Bootstrap Context和Application Context配置的分离。

spring:
  cloud:
    config:
      #需要从github上读取的资源名称，注意没有yml后缀名
      name: microservicecloud-config-client
      #本次访问的配置项
      profile: dev
      label: master
      #本微服务启动后先去找3344号服务，通过SpringCloudConfig获取GitHub的服务地址
      uri: http://config-3344.com:3344

2.4 创建application.yml文件

1
2
3

spring:
  application:
    name: microservicecloud-config-client

2.5 hosts文件增加

1	127.0.0.1 client-config.com

2.6 新建 ConfigClientRest

@RestController
public class ConfigClientRest {
    @Value("${spring.application.name}")
    private String applicationName;
    @Value("${eureka.client.service-url.defaultZone}")
    private String eurekaServers;
    @Value("${server.port}")
    private String port;
    @RequestMapping("/config")
    public String getConfig() {
        String str = "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
        System.out.println("******str: " + str);
        return "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
    }
}

2.7 主启动类

@SpringBootApplication
public class ConfigClient3355Application {
    public static void main(String[] args) {
        SpringApplication.run(ConfigClient3355Application.class, args);
    }
}

2.8 验证

先启动config-3344服务,在启动config-client-3355
bootstrap.yml里面的profile值是什么，决定从github上读取什么
假如目前是 profile: dev ,dev默认在github上对应的端口就是8201,接口访问http://client-config.com:8201/config
假如目前是 profile: test,test默认在github上对应的端口就是8202,接口访问http://client-config.com:8202/config

成功实现了客户端3355访问SpringCloud Config3344通过GitHub获取配置信息

资源获取

公众号回复 : SpringCloud Config客户端配置获取本节代码

公众号回复 : SpringCloud思维导图

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