Spring Cloud Hystrix(仪表盘+Turbine集群)（4）

阳光穿透心脏的1/2处 2022-05-11 04:14 186阅读 0赞

![70][]

在Spring Cloud 中构建一个Hystrix Dashboard非常容易只需要4步：

1.创建一个Spring Boot工程，命名为hystrix-dashboard。

2.编辑pom.xml文件，如：

<?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">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.example</groupId>
        <artifactId>hystrix-dashboard</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>hystrix-dashboard</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.5.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.SR1</spring-cloud.version>
        </properties>
    
        <dependencies>
            <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.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    
    </project>

3.在主类上添加@EnableHystrixDashboard注解启用Hystrix Dashboard功能

4.修改application.properties，如：

spring.application.name=hystrix-dashboard
    server.port=2001

启动后访问[http://localhost:2001/hystrix][http_localhost_2001_hystrix]

![70 1][]

这是Hystrix Dashboard的监控首页，该页面没有具体的监控信息。从页面上可以看出它支持三种监控方式：

1.默认的集群监控：[http://turbine-hostname:port/turbine.stream][http_turbine-hostname_port_turbine.stream]

2.指定的集群监控：[http://turbine-hostname:port/turbine.stream?cluster=\[clusterName\]][http_turbine-hostname_port_turbine.stream_cluster_clusterName]

3.单体应用的监控：http://hystrix-app:port/actuator/hystrix.stream

前两者都是对集群的监控，需要整合Turbine实现。

而开启单点应用的集群监控只需要两步：

1.在服务消费者中新增如下配置文件：

<?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">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.example</groupId>
        <artifactId>eureka-ribbon</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>eureka-ribbon</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.4.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.SR1</spring-cloud.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </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-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    
    </project>

2.在其主类上添加@EnableCircuitBreaker注解开启断路器功能（服务消费者）

3.SpringBoot2.0需要配置如下一个Bean：

@Configuration
    public class HystrixConfig {
    
        @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;
        }
    }

然后开启服务消费者，服务提供者，服务注册中心：

![70 2][]

Ok配置成功。

在[http://localhost:2001/hystrix 下填写地址][http_localhost_2001_hystrix]

![70 3][]

![70 4][]

首页上的参数：

Delay:该参数用来控制服务器上轮询监控信息的延迟时间，默认为2000ms，可以通过配置该属性降低客户端的网络和cpu消耗。

Title:该参数对应了上图Hystrix Stream之后的内容，默认为具体监控实例的URL,可以通过配置该信息展示合适标题。

从监控信息可以看到两个重要的图形信息：一个实心圆和一个曲线。

实心圆：有两种含义：通过颜色变化代表了实例的健康程度，从绿色，黄色，橙色，红色递减。除此之外，它的大小也会根据请求流量的变化而变化，流量越大实心圆就越大。

曲线：用来记录两分钟内流量的相对变化，可以用它来观察流量的上升和下降趋势。

![70 5][]

# #

## Turbine集群监控 ##

![70 6][]

1.新建一个SpringBoot项目

2.修改pom文件，如：

<?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">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.example</groupId>
        <artifactId>turbine</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>turbine</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.5.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.SR1</spring-cloud.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-turbine</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    
    </project>

3.在主类上使用@EnableTurbine和@EnableTurbine注解：

@EnableDiscoveryClient
    @EnableTurbine
    @SpringBootApplication
    public class TurbineApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(TurbineApplication.class, args);
        }
    }

4.修改application.properties

spring.application.name=turbine
    
    server.port=8989
    management.server.port=8990
    
    eureka.client.serviceUrl.defaultZone=http://localhost:1111/eureka/
    
    turbine.app-config=ribbon-consumer
    turbine.cluster-name-expression="default"
    turbine.combine-host-port=true
    turbine.instanceUrlSuffix.default = /hystrix.stream

然后启动服务注册中心，服务提供者，服务消费者，仪表盘等服务。

在上面的配置文件中，turbine.app-config参数指定了需要收集监控信息的服务名，turbine.cluster-name-expression指定了集群默认名为default，当服务多的时候可以启动多个Tubine服务来构建不同的聚合集群，该参数可以用来区分这些不同的聚合集群。同时该参数值可以在Hystrix仪表盘中用cluster参数来指定。turbine.combine-host-port参数设为true，可以让同一主机上的服务通过主机名与端口号的组合进行区分。默认情况下会以host来区分不同的服务，这会使本地调试时，本机上的不同服务聚合成一个服务来统计。

这里我启动了两个服务消费者进行测试：

![70 7][]

OK~~~~~~~~~~~~~~~~

参考《Spring Cloud 微服务实战》

[70]: /images/20220511/c5684042939d49dea9a49b4d9bb28c90.png
[http_localhost_2001_hystrix]: http://localhost:2001/hystrix
[70 1]: /images/20220511/9c8373e4f66e4c3d9b4ffc2d33343599.png
[http_turbine-hostname_port_turbine.stream]: http://turbine-hostname/turbine.stream
[http_turbine-hostname_port_turbine.stream_cluster_clusterName]: http://turbine-hostname/turbine.stream?cluster=%5BclusterName%5D
[70 2]: /images/20220511/e0ba06c3814543a085aa5ab119987e33.png
[70 3]: /images/20220511/6b8a488ef13d4544aa8cb4b9569713fa.png
[70 4]: /images/20220511/376629dd14e54d23bc619c60c880ba2c.png
[70 5]: /images/20220511/6e50fa332473426c8e17d57fd2c94c00.png
[70 6]: /images/20220511/14f0594d43624aa8b7cc6a7531c6b3db.png
[70 7]: /images/20220511/64384ddf9e324d09b6be1f67ceb20571.png