Springcloud之Hystrix集羣及集羣監控turbine

文章目錄

Hystrix集羣及監控turbine

Dashboard演示的僅僅是單機服務監控
這裏集羣監控用的是turbine
turbine是基於Dashboard的。
pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.zh</groupId>
        <artifactId>springcloud</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <artifactId>microservice-student-provider-hystrix</artifactId>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.zh</groupId>
            <artifactId>microservice-common</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.zh</groupId>
            <artifactId>microservice-common</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

        <!--添加註冊中心Eureka相關配置-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- actuator監控引入 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--Hystrix相關依賴-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

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/test?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.zh.com:2001/eureka/,http://eureka2002.zh.com:2002/eureka/,http://eureka2003.zh.com:2003/eureka/

info:
  groupId: com.zh.springcloud
  artifactId: microservice-student-provider-hystrix-1004
  version: 1.0-SNAPSHOT
  userName: http://zh.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/test?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.zh.com:2001/eureka/,http://eureka2002.zh.com:2002/eureka/,http://eureka2003.zh.com:2003/eureka/

info:
  groupId: com.zh.springcloud
  artifactId: microservice-student-provider-hystrix-1005
  version: 1.0-SNAPSHOT
  userName: http://zh.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/test?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.zh.com:2001/eureka/,http://eureka2002.zh.com:2002/eureka/,http://eureka2003.zh.com:2003/eureka/

info:
  groupId: com.zh.springcloud
  artifactId: microservice-student-provider-hystrix-1006
  version: 1.0-SNAPSHOT
  userName: http://zh.com
  phone: 123456

hystrix:
  command:
    default:
      execution:
        isolation:
          thread:
            timeoutInMilliseconds: 1500

從1004複製過來一份(前幾篇博客有具體代碼)

啓動類配置

package com.zh.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.zh.*.*")
@EnableEurekaClient
@SpringBootApplication
public class MicroserviceStudentProviderHystrixApplication {

    public static void main(String[] args) {
        SpringApplication.run(MicroserviceStudentProviderHystrixApplication.class, args);
    }

}

這樣的話就有了 hystrix集羣服務；

我們新建項目microservice-student-consumer-hystrix-turbine-91
pom.xml加下依賴

<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.zh.com:2001/eureka/,http://eureka2002.zh.com:2002/eureka/,http://eureka2003.zh.com:2003/eureka/
turbine:
  app-config: microservice-student   # 指定要監控的應用名稱
  clusterNameExpression: "'default'" #表示集羣的名字爲default
spring:
  application:
    name: turbine

啓動類加註解

package com.zh.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;

@EnableTurbine
@SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
public class MicroserviceStudentConsumerHystrixTurbine91Application {

    public static void main(String[] args) {
        SpringApplication.run(MicroserviceStudentConsumerHystrixTurbine91Application.class, args);
    }

}

http://localhost:91/turbine.stream 可以監控數據，實時ping 返回data

點擊進入集羣監控儀表

Feign、Hystrix整合

前面的代碼，用@HystrixCommand fallbackMethod是很不好的，因爲和業務代碼耦合度太高，不利於維護，所以需要解耦，這我們講下Feign Hystrix整合。

1、microservice-student-provider-hystrix項目修改
我們不用原先那套。按照正常的邏輯來寫；
StudentService加新的接口方法：

/**
 * 測試Hystrix服務降級
 * @return
 */
public Map<String,Object> hystrix();

StudentServiceImpl寫具體實現：

@Value("${server.port}")
    private String port;


@Override
public Map<String, Object> hystrix() {
    Map<String,Object> map=new HashMap<String,Object>();
    map.put("code", 200);
    map.put("info","工號【"+port+"】正在爲您服務");
    return map;
}

StudentProviderController正常調用service方法：

/**
     * 測試Hystrix服務降級
     * @return
     * @throws InterruptedException
     */
    @ResponseBody
    @GetMapping(value="/hystrix")
    @HystrixCommand(fallbackMethod="hystrixFallback")
    public Map<String,Object> hystrix() throws InterruptedException{
        Thread.sleep(2000);
//        Map<String,Object> map=new HashMap<String,Object>();
//        map.put("code", 200);
//        map.put("info","工號【"+port+"】正在爲您服務");
        return studentService.hystrix();
    }

microservice-common項目新建FallbackFactory類，解耦服務熔斷服務降級

StudentClientService接口，新增getInfo方法；

/**
 * 服務熔斷降級
 * @return
 */
@GetMapping(value="/student/hystrix")
public Map<String,Object> hystrix();

新建 StudentClientFallbackFactory 類，實現FallbackFactory接口；

package com.zh.microservicecommon.service;

import com.zh.microservicecommon.entity.Student;
import feign.hystrix.FallbackFactory;
import org.springframework.stereotype.Component;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Component
public class StudentClientFallbackFactory implements FallbackFactory<StudentClientService> {

    @Override
    public StudentClientService create(Throwable cause) {
        return new StudentClientService() {

            @Override
            public boolean save(Student student) {
                return false;
            }

            @Override
            public List<Student> list() {
                return null;
            }

            @Override
            public Map<String, Object> hystrix() {
                Map<String,Object> map=new HashMap<String,Object>();
                map.put("code", 500);
                map.put("info", "系統繁忙，稍後重試");
                return map;
            }

            @Override
            public Student get(Integer id) {
                return null;
            }

            @Override
            public boolean delete(Integer id) {
                return false;
            }

            @Override
            public String ribbon() {
                return null;
            }
        };
    }

}

StudentClientService接口的@FeignClient註解加下 fallbackFactory屬性

@FeignClient(value="MICROSERVICE-STUDENT",fallbackFactory=StudentClientFallbackFactory.class)

這類我們實現了降級處理方法實現

microservice-student-consumer-feign-80修改支持Hystrix
StudentConsumerFeignController新增方法調用

/**
 * Feign整合Hystrix服務熔斷降級
 * @return
 * @throws InterruptedException
 */
@GetMapping(value="/hystrix")
public Map<String,Object> hystrix() throws InterruptedException{
    return studentClientService.hystrix();
}

microservice-common的application.yml加上hystrix支持:

feign:
  hystrix:
    enabled: true

測試:

集羣后超時設置
上面錯誤是什麼原因呢，咱們明明在Hystrix中的application.yml中設置了

hystrix:
  command:
    default:
      execution:
        isolation:
          thread:
            timeoutInMilliseconds: 1500

這裏因爲還有一個 feign 也有一個超時時間的設置，當然feign底層是 ribbon的封裝，所以直接配置ribbon，ribbon默認超時也是1秒。
所以這裏都是強制要求，ribbon的超時時間要大於hystrix的超時時間，否則 hystrix自定義的超時時間毫無意義。
所以還得microservice-student-consumer-feign-80上加個 ribbon超時時間設置

ribbon:
  ReadTimeout: 10000
  ConnectTimeout: 9000

Springcloud之Hystrix集羣及集羣監控turbine

文章目錄

Hystrix集羣及監控turbine

Feign、Hystrix整合

認知提升的方法

螞蟻面試：Springcloud核心組件的底層原理，你知道多少？

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SPA項目前後端分離登錄註冊+首頁導航+左側菜單

Springcloud簡單入門

springboot模版

Springcloud之Hystrix集羣及集羣監控turbine

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