Spring Cloud Config為服務端和客戶端提供了分布式系統的外部化配置支持。配置服務中心采用Git的方式存儲配置文件,因此我們很容易部署修改,有助於對環境配置進行版本管理。
一、配置中心
1.1
新建模塊config-server
pom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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>spring-cloud</artifactId>
<groupId>com.feng</groupId>
<version>0.0.1</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>config-server</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
</dependencies>
</project>
1.2
application.yml
server:
port: 8030
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8010/eureka/ #eureka服務注冊地址
# git管理配置
spring:
cloud:
config:
server:
git:
uri: https://github.com/fengzp/config/ #git倉庫地址
searchPaths: demo* #搜索路徑
# username: username
# password: password
application:
name: config-server
1.3
ConfigApplication,添加EnableConfigServer標識是一個配置中心服務
/**
* @author fengzp
* @date 17/5/4
* @email fengzp@gzyitop.com
* @company 廣州易站通計算機科技有限公司
*/
@SpringBootApplication
@EnableConfigServer
@EnableDiscoveryClient
public class ConfigApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigApplication.class, args);
}
}
1.4
在配置的git倉庫下新建一個demo1的文件夾,在里面創建一個叫client-a-dev.properties的配置文件
文件中隨便加上兩個配置
ip=192.168.30.51
port=9999
啟動模塊,然后打開 http://localhost:8030/client-a/dev
說明讀取配置成功
這里說明一下http請求讀取配置的匹配規則:
/{application}/{profile}[/{label}]
/{application}-{profile}.yml
/{label}/{application}-{profile}.yml
/{application}-{profile}.properties
/{label}/{application}-{profile}.properties
二、客戶端讀取配置
2.1
修改client-a模塊
pom文件新增依賴
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
2.2
bootstrap.yml添加相關配置后
server:
port: 8910
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8010/eureka/
spring:
application:
name: client-a
cloud:
config:
discovery:
enabled: true #開啟通過服務來訪問Config Server的功能
service-id: config-server
profile: dev
label: master
2.3
在TestController添加測試方法
@RestController
public class TestController {
@Autowired
RestTemplate restTemplate;
@RequestMapping("/hi")
@HystrixCommand(fallbackMethod = "hiFallback")
public String hi(@RequestParam String id){
return restTemplate.getForObject("http://service-a/hi?id="+id, String.class);
}
public String hiFallback(String id) {
return "hi, " + id + ", error!";
}
@Value("${ip}")
private String ip;
@Value("${port}")
private String port;
@RequestMapping("/getProperties")
public String getProperties(){
return ip + " : " + port;
}
}
啟動模塊后打開 http://localhost:8910/getProperties
說明讀取配置成功