Spring Cloud - 2 (Spring Cloud Config Server)

短命女 2021-11-29 09:40 278阅读 0赞

# 构建Spring Cloud配置服务器 #

### 实现步骤： ###

**1. ** 在Configuration Class标记@EnableConfigServer

**  2. ** 配置文件目录（基于git）

1.  cloud.properties(默认) //默认环境，跟随代码仓库
2.  cloud-dev.properties(proflie="dev")//开发环境
3.  cloud-test.properties(proflie="test")//测试环境
4.  cloud-staging.properties(proflie="staging")//预发布环境
5.  cloud-prod.properties(proflie="prod")//生产环境

**3. ** 服务端配置版本仓库

spring.cloud.config.server.git.uri=https://github.com/****test****/springcloud.git
    spring.cloud.config.server.git.searchPaths=properties
    spring.cloud.config.label=master
    spring.cloud.config.server.git.username=
    spring.cloud.config.server.git.password=

### **完整配置项：** ###

spring.application.name = config-server
    
    server.port=9090
    
    management.endpoints.web.exposure.include=*
    management.endpoint.health.show-details=always
    
    spring.cloud.config.server.git.uri=https://github.com/****test****/springcloud.git
    spring.cloud.config.server.git.searchPaths=properties
    spring.cloud.config.label=master
    spring.cloud.config.server.git.username=
    spring.cloud.config.server.git.password=

--------------------

# 构建Spring Cloud配置客户端 #

### 实现步骤： ###

**    1. ** 创建 bootstrap.properties 或者 bootstrap.yml 文件

**2.**  bootstrap.properties 或者 bootstrap.yml 文件中配置客户端信息（以下是bootstrap.properties ）

##配置服务器URI
    spring.cloud.config.uri = http://localhost:9090/
    ##配置客户端应用名称
    spring.cloud.config.name = cloud
    ##激活配置
    spring.cloud.config.profile = prod
    ##在github上的分支名
    spring.cloud.config.label = master

###  ###

**3. ** 设置敏感性安全

management.endpoints.web.exposure.include=*

**4.**  设置健康检查

management.endpoint.health.show-details=always

### @RefreshScope用法 ###

@RestController
    @RefreshScope
    public class EchoController {
    
    	@Value("${my.name}")
    	private String myName;
    
    	@GetMapping("/my-name")
    	public String getName() {
    		return myName;
    	}
    }

用户调用**/actuator/refresh**控制客户端配置更新

###  ###

### 实现定时更新客户端 ###

@SpringBootApplication
    @EnableScheduling
    public class SpringCloudConfigServerClientApplication {
    	
    	private final ContextRefresher contextRefresher;
    	
    	private final Environment environment;
    	
    	@Autowired
    	public SpringCloudConfigServerClientApplication(ContextRefresher contextRefresher,
    			Environment environment) {
    		this.contextRefresher = contextRefresher;
    		this.environment = environment;
    	}
    	
    	
    	public static void main(String[] args) {
    		SpringApplication.run(SpringCloudConfigServerClientApplication.class, args);
    	}
    
    	
    	
    	@Scheduled(fixedRate = 5*1000, initialDelay = 3*1000)
    	public void autoRefresh() {
    		
    		Set<String> updatePropertyNames = contextRefresher.refresh();
    		
    		updatePropertyNames.forEach(name -> System.err.println(">>>>>>"+name+environment.getProperty(name)));
    		
    		if(!updatePropertyNames.isEmpty()) {
    			System.err.printf("[Thread :%s] 当前配置已更新，具体项目：%s \n",
    					Thread.currentThread().getName(),
    					updatePropertyNames);
    		}
    	}
    }

###  ###

# 健康检查 #

--------------------

### 意义 ###

**比如应用可以任意地输出业务健康、系统健康等指标**

###  ###

端点URI：/actuator/health

实现类：HealthEndpoint

健康指示器：HealthIndicator，

HealthEndpoint：HealthIndicator，一对多

### 自定义实现HealthIndicator ###

**1.**  实现AbstractHealthIndicator

public class MyHealthIndicator extends AbstracHealthIndicator{
        
        @Override
        protected void doHealthCheck(Health.Builder builder) throws Exception{
    
            builder.up().withDetail("MyHealthIndicator",">>Up>>");
        }
    
    }

**2.**  暴露MyHealthIndicator为bean

@Bean
    public MyHealthIndicator myHealthIndicator(){
        return new MyHealthIndicator();
    }

**3.**  依赖

<dependency>
        <groupId>org.springframework.hateoas</groupId>
        <artifactId>spring-hateoas</artifactId>
    </dependency>

### 其他内容： ###

**查看服务列表：[http://localhost:8080/actuator/][http_localhost_8080_actuator]**

**查看健康状况：[http://localhost:8080/actuator/health][http_localhost_8080_actuator_health] **

[http_localhost_8080_actuator]: http://localhost:8080/actuator/
[http_localhost_8080_actuator_health]: http://localhost:8080/actuator/health