Hystrix fuse - Calculation and Visualization

Fuse computing

10 seconds 20 times, and then calculating the number of errors exceeds the threshold value 50%, fuse open. Recovery service provider, a successful request, the fuse is closed

http://localhost:9002/actuator/health

hystrix: {
status: "CIRCUIT_OPEN",//熔断开启
details: {
openCircuitBreakers: [
"RestTemplateRequestServiceImpl::smsSend"
]
}
}

hystrix.command.default.circuitBreaker.requestVolumeThreshold 一个rolling window内最小的请求数。如果设为20，那么当一个rolling window的时间内（比如说1个rolling window是10秒）收到19个请求，即使19个请求都失败，也不会触发circuit break。默认20
hystrix.command.default.circuitBreaker.errorThresholdPercentage错误比率阀值，如果错误率>=该值，circuit会被打开，并短路所有请求触发fallback。默认50，即为50%。

View original fuse monitoring

Consumer Services Configuration

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

http://localhost:9002/actuator/hystrix.stream，访问会发现一直在ping

Visualization

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
		</dependency>
		@EnableHystrixDashboard

http: // localhost: 6101 / hystrix port server.port configuration
input original view monitoring address: http: // localhost: 9002 / actuator / hystrix.stream

Centralized visualization

To display a single focus: Turbine

<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-turbine</artifactId>
</dependency>
<!-- eureka客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
turbine:
  app-config: api-1,api-2
  cluster-name-expression: "'default'
   @EnableTurbine

Address: http: // localhost: 6102 / turbine.stream, also has ping, equivalent to the original hystrix.stream, but here is the combination of all the projects.

Start hystrix-dashboard.

Visit: http: // localhost: 6101 / hystrix

Fill the above address: http: // localhost: 6102 / turbine.stream

Visualization Legend