公众号:java 乐园
在微服务架构中如何去监控服务的状态是否正常,非常重要。为例保证微服务的可用性,防止程序断路器模型。运维人员需要一个友好的程序来监控微服务的状态,Hystrix Dashboard 作为断路器监控的一个重要组件,提供了数据监控及非常友好的图形化界面,方便运维人员对服务进行监控;,通过界面反馈的信息可以快速发现系统中存在的问题。另外 Hystrix Dashboard 是一个独立的服务结点,不需要配置任何的注册中心。
1、新建项目 sc-hystrix-dashboard,对用的 pom.xml 文件如下
<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">
<modelVersion>4.0.0</modelVersion>
<groupId>spring-cloud</groupId>
<artifactId>sc-hystrix-dashboard</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>sc-hystrix-dashboard</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Finchley.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<!-- <dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
<version>1.4.5.RELEASE</version>
</dependency> -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
</dependency>
<!-- <dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
<version>1.4.5.RELEASE</version>
</dependency> -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
</project>
说明:spring cloud 2.x 之后 spring-cloud-starter-hystrix-dashboard 和 spring-cloud-starter-hystrix 都标志为过期,具体推荐使用两个依赖请看下面的图片
2、新建 spring boot 启动类 DashboardApplication.java
package sc.hystrix.dashboard;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
@SpringBootApplication
@EnableHystrixDashboard
public class DashboardApplication {public static void main(String[] args) {SpringApplication.run(DashboardApplication.class, args);
}
}
只需添加注解 EnableHystrixDashboard,启动 Hystrix Dashboard 即可
3、配置 Hystrix Dashboard 对应的 Servlet
package sc.hystrix.dashboard;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
@Configuration
public class DashboardServletConfig {
@Bean
public ServletRegistrationBean getDashboardServlet(){HystrixMetricsStreamServlet servlet = new HystrixMetricsStreamServlet();
ServletRegistrationBean bean = new ServletRegistrationBean(servlet);
bean.setLoadOnStartup(1);
bean.addUrlMappings("/hystrix.stream");
bean.setName("hystrix");
return bean;
}
}
4、新建配置文件 bootstrap.yml
spring:
application:
name: sc-hystrix-dashboard
server:
port: 2001
5、启动并验证是否启动成功
方法一:查看日志配置的端口 2001,在日志中标志启动成功
方法二:从上图标志的 1 中可以知道可以方法地址:http://127.0.0.1:2001/hystrix
6、分析一下下图中的英文
大概的意思是:如果查看默认集群使用第一个 url,查看指定集群使用第二个 url,单个应用监控使用最后一个
7、在 url 中输入 http://127.0.0.1:2001/hystrix.stream
然后点击 Monitor Stream 按钮
或者访问 http://localhost:2001/hystrix.stream 也会不断的显示 ping