Hystrix集群及集群监控turbine
Hystrix集群及监控turbine
前面Dashboard演示的仅仅是单机服务监控，实际项目基本都是集群，所以这里集群监控用的是turbine。
turbine是基于Dashboard的。
先搞个集群；
再microservice-student-provider-hystrix-1004项目的基础上再搞一个microservice-student-provider-hystrix-1005
代码和配置都复制一份，然后修改几个地方；
1、yml配置
--- server: port: 1004 context-path: / spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/xm1?useUnicode=true&characterEncoding=utf8 username: root password: 123 jpa: hibernate: ddl-auto: update show-sql: true application: name: microservice-student profiles: provider-hystrix-1004 eureka: instance: hostname: localhost appname: microservice-student instance-id: microservice-student:1004 prefer-ip-address: true client: service-url: defaultZone: http://eureka2001.jt.com:2001/eureka/,http://eureka2002.jt.com:2002/eureka/,http://eureka2003.jt.com:2003/eureka/ info: groupId: com.jt.testSpringcloud artifactId: microservice-student-provider-hystrix-1004 version: 1.0-SNAPSHOT userName: http://jt.com phone: 123456 hystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 1500 --- server: port: 1005 context-path: / spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/xm1?useUnicode=true&characterEncoding=utf8 username: root password: 123 jpa: hibernate: ddl-auto: update show-sql: true application: name: microservice-student profiles: provider-hystrix-1005 eureka: instance: hostname: localhost appname: microservice-student instance-id: microservice-student:1005 prefer-ip-address: true client: service-url: defaultZone: http://eureka2001.jt.com:2001/eureka/,http://eureka2002.jt.com:2002/eureka/,http://eureka2003.jt.com:2003/eureka/ info: groupId: com.jt.testSpringcloud artifactId: microservice-student-provider-hystrix-1005 version: 1.0-SNAPSHOT userName: http://jt.com phone: 123456 hystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 1500 --- server: port: 1006 context-path: / spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/xm1?useUnicode=true&characterEncoding=utf8 username: root password: 123 jpa: hibernate: ddl-auto: update show-sql: true application: name: microservice-student profiles: provider-hystrix-1006 eureka: instance: hostname: localhost appname: microservice-student instance-id: microservice-student:1006 prefer-ip-address: true client: service-url: defaultZone: http://eureka2001.jt.com:2001/eureka/,http://eureka2002.jt.com:2002/eureka/,http://eureka2003.jt.com:2003/eureka/ info: groupId: com.jt.testSpringcloud artifactId: microservice-student-provider-hystrix-1006 version: 1.0-SNAPSHOT userName: http://jt.com phone: 123456 hystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 1500
2、启动类配置
package com.jt.microservicestudentproviderhystrix; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.domain.EntityScan; import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @EnableCircuitBreaker @EntityScan("com.jt.*.*") @EnableEurekaClient @SpringBootApplication public class MicroserviceStudentProviderHystrixApplication { public static void main(String[] args) { SpringApplication.run(MicroserviceStudentProviderHystrixApplication.class, args); } }
3、我们新建项目microservice-student-consumer-hystrix-turbine-91
pom.xml加下依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-turbine</artifactId>
</dependency>
application.yml
server: port: 91 context-path: / eureka: client: service-url: defaultZone: http://eureka2001.jt.com:2001/eureka/,http://eureka2002.jt.com:2002/eureka/,http://eureka2003.jt.com:2003/eureka/ turbine: app-config: microservice-student # 指定要监控的应用名称 clusterNameExpression: "'default'" #表示集群的名字为default spring: application: name: turbine
1、新建启动类MicroserviceStudentConsumerHystrixTurbine91Application 加注解：@EnableTurbine
package com.jt.microservicestudentconsumerhystrixturbine91; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; import org.springframework.cloud.netflix.turbine.EnableTurbine; @SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class}) @EnableTurbine public class MicroserviceStudentConsumerHystrixTurbine91Application { public static void main(String[] args) { SpringApplication.run(MicroserviceStudentConsumerHystrixTurbine91Application.class, args); } }
测试：
先启动三个eureka，然后把1004 1005 带hystrix的服务都启动；
microservice-student-consumer-80这个也启动，方便测试；
dashboard，turbine启动；
这样的话 http://localhost/student/hystrix 就能调用服务集群；
http://localhost:91/turbine.stream 可以监控数据，实时ping 返回data
Feign、Hystrix整合
前面的代码，用@HystrixCommand fallbackMethod是很不好的，因为和业务代码耦合度太高，不利于维护，所以需要解耦，这我们讲下Feign Hystrix整合。
1、microservice-student-provider-hystrix项目修改
我们不用原先那套。按照正常的逻辑来写；
StudentService加新的接口方法：
/** * 测试Hystrix服务降级 * @return */ public Map<String,Object> hystrix();
StudentServiceImpl写具体实现：
@Override public Map<String, Object> hystrix() { Map<String,Object> map=new HashMap<String,Object>(); map.put("code", 200); map.put("info","工号【"+port+"】正在为您服务"); return map; }
StudentProviderController正常调用service方法：
/** * 测试Hystrix服务降级 * @return * @throws InterruptedException */ @ResponseBody @GetMapping(value="/hystrix") // @HystrixCommand(fallbackMethod="hystrixFallback") public Map<String,Object> hystrix() throws InterruptedException{ Thread.sleep(100); // Map<String,Object> map=new HashMap<String,Object>(); // map.put("code", 200); // map.put("info","工号【"+port+"】正在为您服务"); return this.studentService.hystrix(); } // public Map<String,Object> hystrixFallback() throws InterruptedException{ // Map<String,Object> map=new HashMap<String,Object>(); // map.put("code", 500); // map.put("info", "系统【"+port+"】繁忙，稍后重试"); // return map; // }
2、microservice-common项目新建FallbackFactory类，解耦服务熔断服务降级
StudentClientService接口，新增getInfo方法；
/** * 服务熔断降级 * @return */ @GetMapping(value="/student/hystrix") public Map<String,Object> hystrix();
新建 StudentClientFallbackFactory 类，实现FallbackFactory<StudentClientService>接口；
package com.jt.microservicecommon.service; import com.jt.microservicecommon.entity.Student; import feign.hystrix.FallbackFactory; import org.springframework.stereotype.Component; import java.util.HashMap; import java.util.List; import java.util.Map; /** * @author jt * @site www.xiaomage.com * @company xxx公司 * @create 2019-12-10 21:50 */ @Component public class StudentClientFallbackFactory implements FallbackFactory<StudentClientService> { @Override public StudentClientService create(Throwable throwable) { return new StudentClientService() { @Override public Student get(Integer id) { return null; } @Override public List<Student> list() { return null; } @Override public boolean save(Student student) { return false; } @Override public boolean delete(Integer id) { return false; } @Override public String ribbon() { return null; } @Override public Map<String, Object> hystrix() { Map<String, Object> map = new HashMap<String, Object>(); map.put("code", 500); map.put("info", "系统繁忙，请稍后重试。。。。"); return map; } }; } }
StudentClientService接口的@FeignClient注解加下 fallbackFactory属性
@FeignClient(value="MICROSERVICE-STUDENT",fallbackFactory=StudentClientFallbackFactory.class)
这类我们实现了 降级处理方法实现；
3、microservice-student-consumer-feign-80修改 支持Hystrix
StudentConsumerFeignController新增方法调用
/** * Feign整合Hystrix服务熔断降级 * @return * @throws InterruptedException */ @GetMapping(value="/hystrix") public Map<String,Object> hystrix() throws InterruptedException{ return studentClientService.hystrix(); }
4、microservice-student-consumer-feign-80的application.yml加上hystrix支持
server: port: 8080 context-path: / eureka: client: service-url: defaultZone: http://eureka2001.jt.com:2001/eureka/,http://eureka2002.jt.com:2002/eureka/,http://eureka2003.jt.com:2003/eureka/ register-with-eureka: false feign: hystrix: enabled: true ribbon: ReadTimeout: 10000 ConnectTimeout: 9000
1、microservice-student-consumer-feign-80的启动类上添加公共模块
@ComponentScan(basePackages = {"com.javaxl.microservicecommon","com.javaxl.microservicestudentconsumerfeign80"})
注意：
公共子项目与当前子项目的基包都要扫描到；
只指定公共子模块为基包会导致本子项目的springmvc功能失效；
只指定本子项目为基包会导致feign与Hystrix集成失败，从而导致服务熔断功能失效
package com.jt.microservicestudentconsumerfeign80; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.netflix.feign.EnableFeignClients; import org.springframework.context.annotation.ComponentScan; @ComponentScan(basePackages = {"com.jt.microservicecommon","com.jt.microservicestudentconsumerfeign80"})//扫描公共模块 @EnableFeignClients(value = "com.jt.*.*") @EnableEurekaClient @SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class}) public class MicroserviceStudentConsumerFeign80Application { public static void main(String[] args) { SpringApplication.run(MicroserviceStudentConsumerFeign80Application.class, args); } }
