配置中心Spring Cloud Config

1、概念

官网：https://cloud.spring.io/spring-cloud-config/reference/html/

访问方式：

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

application 服务器名称 profile 环境名称，开发、测试、生产 lable 仓库分支、默认master分支

2、搭建Config Server

2.1、引入依赖

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-server</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency>

2.2、@EnableConfigServer

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

2.3、配置文件

eureka: client: serviceUrl: defaultZone: http://localhost:7001/eureka/ spring: application: name: config-server cloud: config: server: git: uri: https://gitee.com/xxxx/config_cloud username:xxx8@qq.com password: xxxx server: port: 9010

2.4、测试

访问http://localhost:9010/config-dev.yml

3、搭建Config Client

3.1、引入依赖

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

3.2、修改对应服务的配置文件

把application.yml 改为 bootstrap.yml

# bootstrap.yml #指定注册中心地址 eureka: client: serviceUrl: defaultZone: http://localhost:7001/eureka/ #服务的名称 spring: application: name: order-service #指定从哪个配置中心读取 cloud: config: discovery: service-id: CONFIG-SERVER enabled: true profile: dev #建议用lable去区分环境，默认是lable是master分支 #label: test

3.3、gitee中添加对应的配置文件

3.4、测试

添加一个测试类

@RestController public class TestController { @Value("${test}") private String test; @GetMapping("test") public String test(){ return test; } }

启动顺序：注册中心-> 配置中心->对应的服务

通过配置中心访问：http://localhost:9010/order-service-dev.yml

启动order-servcie:

访问：http://localhost:8090/test

3.5、手动刷新

现在有一个问题：在git上修改配置文件后，order-service必须重启才能读到修改的内容

配置中心读到的也是2

但是order-service的还是1

引入依赖

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>

增加配置：

management: endpoints: web: exposure: include: "*"

需要刷新配置的地方，增加注解 @RefreshScope

@RefreshScope @RestController public class TestController { @Value("${test}") private String test; @GetMapping("test") public String test(){ return test; } }

post 方式发送http://localhost:8090/actuator/refresh刷新

4、结合Spring Cloud Bus

Spring Cloud Bus消息总线，支持RabbitMQ 和Kafka

4.1、Config Server端

引入依赖

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bus-amqp</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>

添加配置

spring: rabbitmq: host: 192.168.0.71 port: 5672 username: guest password: guest management: endpoints: web: exposure: include: "bus-refresh"

4.2、Config Client 端配置

依赖

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bus-amqp</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>

配置文件

#指定注册中心地址 eureka: client: serviceUrl: defaultZone: http://localhost:7001/eureka/ #服务的名称 spring: rabbitmq: host: 192.168.0.71 port: 5672 username: guest password: guest application: name: order-service # 允许消息跟踪 cloud: bus: trace: enabled: true #指定从哪个配置中心读取 config: discovery: service-id: CONFIG-SERVER enabled: true profile: dev #建议用lable去区分环境，默认是lable是master分支 #label: test management: endpoints: web: exposure: include: "*"

在需要刷新的类上加上@RefreshScope

@RefreshScope @RestController public class TestController { @Value("${test}") private String test; @GetMapping("test") public String test(){ return test; } }

4.3、发送刷新请求到Config Server端

curl -X POST http://localhost:9091/actuator/bus-refresh