springcloud11 spring cloud config
1.spring cloud config是什么
官网：https://cloud.spring.io/spring-cloud-static/spring-cloud-config/2.2.1.RELEASE/reference/html/
Spring Cloud Config项目是一个解决分布式系统的配置管理方案。它包含了Client和Server两个部分，server提供配置文件的存储、以接口的形式将配置文件的内容提供出去，client通过接口获取数据、并依据此数据初始化自己的应用
2.使用
实际使用过程中，我们把配置文件放在git上面，创建一个config的server端，实时同步git上的配置文件。再把配置文件的内容以接口的形式提供除去。client去获取server的配置数据。
2.1在git上创建一个项目
里面放入配置文件，我这里有三个配置文件。注意文件的命名格式。
2.2创建一个模块作为server
2.2.1 依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
完整依赖
<dependencies>
<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>
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
2.2.2配置文件
server:
port: 3344 eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版 spring:
application:
name: config-server
cloud:
config:
server:
git:
uri: https://gitee.com/xxx/sprincloud-config.git #git仓库路径
search-paths:
- springcloud-config #搜索路径
username: xx
password: xxx
label: master
cloud.config.server.git：
uri：配置文件项目的git的地址
searc-paths：搜索路径，如下图
username：git用户名
password：git密码
label：分支，如下图
2.2.3主启动类
注解 @EnableConfigServer
package com.atguigu.springcloud; import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.cloud.netflix.hystrix.EnableHystrix; @SpringBootApplication
@EnableConfigServer
public class ConfigCenterMain3344 {
public static void main(String[] args) {
SpringApplication.run(ConfigCenterMain3344.class,args);
} }
2.2.4测试
访问三个配置文件，都访问到了
2.3创建一个client端-也就是需要使用server端配置内容的服务
2.3.1pom文件
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
完整依赖
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
2.3.2配置文件
注意文件名称为：bootstrap.yml
server:
port: 3355 eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版 spring:
application:
name: config-client
cloud:
config:
label: master #分支名称
name: config #配置文件名称
profile: dev #读取配置文件的后缀名称
uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml
cloud.config:
label 分支名称
name 配置文件名称
profile 配置文件后缀名称
uri：server地址
这几个配置合起来就是： http://localhost:3344/master/config-dev.yml
2.3.3 主启动类
package com.atguigu.springcloud; import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication
@EnableEurekaClient
public class ConfigCenterMain3355 {
public static void main(String[] args) {
SpringApplication.run(ConfigCenterMain3355.class,args);
} }
2.3.4 业务类
package com.atguigu.springcloud.controller; import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.*; import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit; @RestController
@Slf4j
public class PaymentController { @Value("${config.info}")
private String configInfo; //这里config.info是读取配置中心的配置 @GetMapping("/configInfo")
public String getConfigInfo(){
return configInfo;
}
}
2.3.5测试
表示配置读取成功
2.4若git上配置文件发生变化
2.4.1在git上修改config-dev的内容
2.4.2访问server
自动完成同步
2.4.3访问client
没有自动同步，只有重启client才完成同步
2.5自动同步配置
2.5.1在client加入依赖，加入actuator监控
前面已经添加了
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
2.5.2配置文件
加入以下配置，暴露监控端点
management:
endpoints:
web:
exposure:
include: "*"
完整
server:
port: 3355 eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版 spring:
application:
name: config-client
cloud:
config:
label: master #分支名称
name: config #配置文件名称
profile: dev #读取配置文件的后缀名称
uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml #暴露监控端点
management:
endpoints:
web:
exposure:
include: "*"
2.5.3在业务类加入注解@RefreshScope - 刷新配置
package com.atguigu.springcloud.controller; import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.*; import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit; @RestController
@Slf4j
@RefreshScope //刷新配置
public class PaymentController { @Value("${config.info}")
private String configInfo; @GetMapping("/configInfo")
public String getConfigInfo(){
return configInfo;
}
}
2.5.4在修改配置文件后，需向client发送一个POST请求
http://localhost:3355/actuator/refresh
2.5.5测试
修改配置文件
发送post请求
访问server，配置内容已更新
访问client，配置内容已更新
2.6还存在的缺陷
每次修改配置都需要向client发送post请求，如果存在多个client，就比较麻烦。这里就用到spring cloud bus。config和bus是相互配合的好搭档，一般都是一起使用。
3.使用spring cloud bus
3.1基本说明
Spring Cloud Bus 对自己的定位是 Spring Cloud 体系内的消息总线，使用 message broker 来连接分布式系统的所有节点。
bus有两种通知方式
方式1：
bus通知一个client，再有client把消息通知给其他client
方式2：
bus通知config的server端，再由server端通知client
方式二的架构显然更加合适，方式一不适合的原因如下：
打破了微服务的职责单一性，因为微服务本身是业务模块，它本不应该承担配置刷新职责
破坏了微服务各节点的对等性
有一定的局限性。例如，微服务在迁移时，它的网络地址常常会发生变化，此时如果想要做到自动刷新，那就会增加更多的修改
所以我们采取方式二
3.1环境准备
spring cloud bus不需具备Rabbitmq或者kafka
RabbitMq安装：https://www.cnblogs.com/jthr/p/13786746.html
3.2修改cloud-config-center-3344
3.2.1 添加依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
完整
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
3.2.2配置文件添加
rabbitmq:
host: localhost #rabbitmq地址
port: 5672 #端口
username: guest #账号
password: guest #密码 management: #暴露bus刷新的端点
endpoints:
web:
exposure:
include: bus-refresh
完整
server:
port: 3344 eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版 spring:
application:
name: config-server
cloud:
config:
server:
git:
uri: https://gitee.com/xxx/sprincloud-config.git #git仓库路径
search-paths:
- springcloud-config #搜索路径
username: xxx
password: xxx
label: master rabbitmq:
host: localhost #rabbitmq地址
port: 5672 #端口
username: guest #账号
password: guest #密码 management: #暴露bus刷新的端点
endpoints:
web:
exposure:
include: bus-refresh
3.3修改cloud-config-client-3355
3.3.1添加依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
完整
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
3.3.2配置文件添加
rabbitmq:
host: localhost
port: 5672
username: guest
password: guest
完整
server:
port: 3355 eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版 spring:
application:
name: config-client
cloud:
config:
label: master #分支名称
name: config #配置文件名称
profile: dev #读取配置文件的后缀名称
uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml rabbitmq:
host: localhost
port: 5672
username: guest
password: guest #暴露监控端点 management:
endpoints:
web:
exposure:
include: "*"
3.4新建cloud-config-client-3366
前面有了cloud-config-client-3355，这里新建一个3366，这样子就有两个client，演示效果更好。
3366和3355内容除了端口号，其它一模一样
3.4.1新建
3.4.2pom文件依赖
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
3.4.3配置文件
名字：bootstrap.yml
server:
port: 3366 eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版 spring:
application:
name: config-client
cloud:
config:
label: master #分支名称
name: config #配置文件名称
profile: dev #读取配置文件的后缀名称
uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml rabbitmq:
host: localhost
port: 5672
username: guest
password: guest #暴露监控端点
management:
endpoints:
web:
exposure:
include: "*"
3.4.4主启动类
package com.atguigu.springcloud; import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication
@EnableEurekaClient
public class ConfigCenterMain3366 {
public static void main(String[] args) {
SpringApplication.run(ConfigCenterMain3366.class,args);
} }
3.4.5业务类
package com.atguigu.springcloud.controller; import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController; @RestController
@Slf4j
@RefreshScope //刷新配置
public class PaymentController { @Value("${config.info}")
private String configInfo; @GetMapping("/configInfo")
public String getConfigInfo(){
return configInfo;
}
}
3.5测试
启动项目
3.5.1访问
访问server3344
访问3355
访问3366
3.5.3修改git上的配置文件
3.5.4发送POST请求
http://localhost:3344/actuator/bus-refresh
3.5.5再次访问
配置内容已经自动更新
3.5.6说明
上面的测试说明，在修改git上配置文件后，只需要发送一次POST请求到server，所有的client会更新配置文件内容。这样子就不用去对每个client端发送POST请求了。
3.6差异化通知
如果我们只需要部分client更新而不是全部client更新，该怎么做，只需要对发送的POST请求进行修改
3.5.1修改git上配置文件
3.5.2发送POST请求
http://localhost:3344/actuator/bus-refresh/config-client:3355
config-client：微服务名称 3355：端口号
3.5.3再次访问
server3344和client3355都更新了，client3366没有更新
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