目錄
1 前言
除了隔離依賴服務的調用以外,Hystrix還提供了準實時調用監控(Hystrix Dashboard),Hystrix會持續記錄所有通過Hystrix發起請求的執行信息,並以統計報表和圖形的形式展示給用戶,包括每秒執行多少請求,有多少是成功的,有多少是失敗的。
Netflix通過hystrix-metrics-event-stream項目實現了對以上項目的監控。SpringCloud提供了對Hystrix Dashboard的整合,將監控內容轉換爲可視化頁面。
2 新建module
2.1 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>cloud2020</artifactId>
<groupId>com.bighuan.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-consumer-hystrix-dashboard9001</artifactId>
<dependencies>
<!--hystrix-dashboard-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.bighuan.springcloud.HystrixDashboardMain9001</mainClass>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
2.2 application.yml
只指定端口爲9001,沒有其他配置。
2.3 啓動類
通過@EnableHystrixDashboard開啓Hystrix Dashboard
@SpringBootApplication
@EnableHystrixDashboard // 開啓hystrix dashboard
public class HystrixDashboardMain9001 {
public static void main(String[] args) {
SpringApplication.run(HystrixDashboardMain9001.class, args);
}
}
2.4 啓動項目
訪問hystrix:http://127.0.0.1:9001/hystrix
2.5 監控
1)在新版本Hystrix監控的項目主啓動類中需要指定監控路徑,否則會報錯。如下被監控服務的主啓動類:
@SpringBootApplication
@EnableEurekaClient
@EnableCircuitBreaker
public class PaymentHystrixMain8001 {
public static void main(String[] args) {
SpringApplication.run(PaymentHystrixMain8001.class, args);
}
/**
* 此配置是爲了hystrix服務監控而配置,與服務容錯本身無關,SpringCloud升級後的坑
*ServletRegistrationBean因爲SpringBoot的默認路徑不是/hystrix.stream
* 只要在自己的項目上配置好下面的servlet即可
*/
@Bean
public ServletRegistrationBean getServlet(){
HystrixMetricsStreamServlet streamServlet=new HystrixMetricsStreamServlet();
ServletRegistrationBean registrationBean=new ServletRegistrationBean(streamServlet);
registrationBean.setLoadOnStartup(1);
registrationBean.addUrlMappings("/hystrix.stream");
registrationBean.setName("HystrixMetricsStreamServlet");
return registrationBean;
}
}
啓動被監控的服務類,在Hystrix Dashboard頁面進行監控:
點擊Monitor Stream,進入信息監控頁面(並訪問被監控的8001項目):
說明: