0.9.0.RELEASE版本的spring cloud alibaba sentinel实例 0.9.0.RELEASE版本的spring cloud alibaba nacos实例 jmeter使用经历

其他 2019-08-22 13:38:05 阅读次数: 0

　　sentinel即哨兵，相比hystrix断路器而言，它的功能更丰富。hystrix仅支持熔断，当服务消费方调用提供方发现异常后，进入熔断；sentinel不仅支持异常熔断，也支持响应超时熔断，另外还支持限流，以及针对网关的熔断和限流。此外，它还有过载处理、监控控制台（Sentinel Dashboard）等。hystrix作为组件集成到微服务中，sentinel也是如此，但它的控制台需要独立部署。

　　先下载Sentinel Dashboard（下载地址https://github.com/alibaba/Sentinel/releases），目前最新版本是1.6.3，下载到本地（我的是E盘download目录下）后启动jar包：

C:\Users\wulf>e:

E:\>cd download

E:\download>java -jar sentinel-dashboard.jar
SLF4J: The requested version 1.7.16 by your slf4j binding is not compatible with [1.6]
SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details.

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.6.3.RELEASE)

2019-08-21 15:58:42 [main] INFO  c.t.c.sentinel.dashboard.Application - Starting Application on wulf00 with PID 35648 (E:\download\sentinel-dashboard.jar started by wulf in E:\download)
2019-08-21 15:58:42 [main] INFO  c.t.c.sentinel.dashboard.Application - No active profile set, falling back to default profiles: default
2019-08-21 15:58:43 [main] INFO  o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext - Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@3d012ddd: startup date [Wed Aug 21 15:58:43 CST 2019]; root of context hierarchy
2019-08-21 15:58:50 [main] INFO  o.s.b.c.e.t.TomcatEmbeddedServletContainer - Tomcat initialized with port(s): 8080 (http)
2019-08-21 15:58:50 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat]
2019-08-21 15:58:50 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet Engine: Apache Tomcat/8.5.23
2019-08-21 15:58:50 [localhost-startStop-1] INFO  o.a.c.c.C.[Tomcat].[localhost].[/] - Initializing Spring embedded WebApplicationContext
2019-08-21 15:58:51 [localhost-startStop-1] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 7875 ms
2019-08-21 15:58:51 [localhost-startStop-1] INFO  c.t.c.s.dashboard.config.WebConfig - sentinelFilterRegistration(), add CommonFilter
2019-08-21 15:58:51 [localhost-startStop-1] INFO  o.s.b.w.s.FilterRegistrationBean - Mapping filter: 'characterEncodingFilter' to: [/*]
2019-08-21 15:58:51 [localhost-startStop-1] INFO  o.s.b.w.s.FilterRegistrationBean - Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2019-08-21 15:58:51 [localhost-startStop-1] INFO  o.s.b.w.s.FilterRegistrationBean - Mapping filter: 'httpPutFormContentFilter' to: [/*]
2019-08-21 15:58:51 [localhost-startStop-1] INFO  o.s.b.w.s.FilterRegistrationBean - Mapping filter: 'requestContextFilter' to: [/*]
2019-08-21 15:58:51 [localhost-startStop-1] INFO  o.s.b.w.s.FilterRegistrationBean - Mapping filter: 'sentinelFilter' to urls: [/*]
2019-08-21 15:58:51 [localhost-startStop-1] INFO  o.s.b.w.s.ServletRegistrationBean - Mapping servlet: 'dispatcherServlet' to [/]
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerAdapter - Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@3d012ddd: startup date [Wed Aug 21 15:58:43 CST 2019]; root of context hierarchy
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/app/names.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<java.util.List<java.lang.String>> com.taobao.csp.sentinel.dashboard.view.AppController.queryApps(javax.servlet.http.HttpServletRequest)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/app/briefinfos.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<java.util.List<com.taobao.csp.sentinel.dashboard.discovery.AppInfo>> com.taobao.csp.sentinel.dashboard.view.AppController.queryAppInfos(javax.servlet.http.HttpServletRequest)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/app/{app}/machines.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<java.util.List<com.taobao.csp.sentinel.dashboard.view.vo.MachineInfoVo>> com.taobao.csp.sentinel.dashboard.view.AppController.getMachinesByApp(java.lang.String)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/degrade/new.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.DegradeController.add(java.lang.String,java.lang.String,java.lang.Integer,java.lang.String,java.lang.String,java.lang.Double,java.lang.Integer,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/degrade/delete.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.DegradeController.delete(java.lang.Long)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/degrade/save.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.DegradeController.updateIfNotNull(java.lang.Long,java.lang.String,java.lang.String,java.lang.String,java.lang.Double,java.lang.Integer,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/degrade/rules.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<java.util.List<com.taobao.csp.sentinel.dashboard.datasource.entity.DegradeRuleEntity>> com.taobao.csp.sentinel.dashboard.view.DegradeController.queryMachineRules(java.lang.String,java.lang.String,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/demo/loop],produces=[application/json]}" onto public java.lang.String com.taobao.csp.sentinel.dashboard.view.DemoController.loop(java.lang.String,int) throws com.alibaba.csp.sentinel.slots.block.BlockException
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/demo/link],produces=[application/json]}" onto public java.lang.String com.taobao.csp.sentinel.dashboard.view.DemoController.link() throws com.alibaba.csp.sentinel.slots.block.BlockException
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/demo/greeting],produces=[application/json]}" onto public java.lang.String com.taobao.csp.sentinel.dashboard.view.DemoController.greeting()
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/demo/slow],produces=[application/json]}" onto public java.lang.String com.taobao.csp.sentinel.dashboard.view.DemoController.slow(java.lang.String,int) throws com.alibaba.csp.sentinel.slots.block.BlockException
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/flow/new.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.FlowController.add(java.lang.String,java.lang.String,java.lang.Integer,java.lang.String,java.lang.String,java.lang.Integer,java.lang.Double,java.lang.Integer,java.lang.String,java.lang.Integer,java.lang.Integer,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/flow/delete.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.FlowController.delete(java.lang.Long)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/flow/save.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.FlowController.updateIfNotNull(java.lang.Long,java.lang.String,java.lang.String,java.lang.String,java.lang.Integer,java.lang.Double,java.lang.Integer,java.lang.String,java.lang.Integer,java.lang.Integer,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/flow/rules.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<java.util.List<com.taobao.csp.sentinel.dashboard.datasource.entity.FlowRuleEntity>> com.taobao.csp.sentinel.dashboard.view.FlowController.queryMachineRules(java.lang.String,java.lang.String,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/health],methods=[GET]}" onto public java.lang.String com.taobao.csp.sentinel.dashboard.view.HealthCheck.checkPreload()
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/registry/machine],produces=[application/json]}" onto public com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.MachineRegistryController.receiveHeartBeat(java.lang.String,java.lang.Long,java.lang.String,java.lang.String,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/metric/queryTopResourceMetric.json],produces=[application/json]}" onto public com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.MetricController.queryTopResourceMetric(java.lang.String,java.lang.Integer,java.lang.Integer,java.lang.Boolean,java.lang.Long,java.lang.Long,java.lang.String)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/metric/queryByAppAndResource.json],produces=[application/json]}" onto public com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.MetricController.queryByAppAndResource(java.lang.String,java.lang.String,java.lang.Long,java.lang.Long)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/resource/machineResource.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.ResourceController.fetchIdentityOfMachine(java.lang.String,java.lang.Integer,java.lang.String,java.lang.String)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/system/new.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.SystemController.add(java.lang.String,java.lang.String,java.lang.Integer,java.lang.Double,java.lang.Long,java.lang.Long,java.lang.Double)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/system/delete.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.SystemController.delete(java.lang.Long)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/system/save.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<?> com.taobao.csp.sentinel.dashboard.view.SystemController.updateIfNotNull(java.lang.Long,java.lang.String,java.lang.Double,java.lang.Long,java.lang.Long,java.lang.Double)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/system/rules.json],produces=[application/json]}" onto com.taobao.csp.sentinel.dashboard.view.Result<java.util.List<com.taobao.csp.sentinel.dashboard.datasource.entity.SystemRuleEntity>> com.taobao.csp.sentinel.dashboard.view.SystemController.queryMachineRules(java.lang.String,java.lang.String,java.lang.Integer)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2019-08-21 15:58:53 [main] INFO  o.s.w.s.h.SimpleUrlHandlerMapping - Root mapping to handler of type [class org.springframework.web.servlet.mvc.ParameterizableViewController]
2019-08-21 15:58:53 [main] INFO  o.s.w.s.h.SimpleUrlHandlerMapping - Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-08-21 15:58:53 [main] INFO  o.s.w.s.h.SimpleUrlHandlerMapping - Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-08-21 15:58:53 [main] INFO  o.s.w.s.h.SimpleUrlHandlerMapping - Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-08-21 15:58:53 [main] WARN  o.s.b.a.t.AbstractTemplateResolverConfiguration - Cannot find template location: classpath:/templates/ (please add some templates or check your Thymeleaf configuration)
2019-08-21 15:58:55 [main] INFO  o.s.j.e.a.AnnotationMBeanExporter - Registering beans for JMX exposure on startup
2019-08-21 15:58:55 [main] INFO  o.s.b.c.e.t.TomcatEmbeddedServletContainer - Tomcat started on port(s): 8080 (http)
2019-08-21 15:58:55 [main] INFO  c.t.c.sentinel.dashboard.Application - Started Application in 13.731 seconds (JVM running for 16.72)
2019-08-21 15:58:55 [http-nio-8080-exec-1] INFO  o.a.c.c.C.[Tomcat].[localhost].[/] - Initializing Spring FrameworkServlet 'dispatcherServlet'
2019-08-21 15:58:55 [http-nio-8080-exec-1] INFO  o.s.web.servlet.DispatcherServlet - FrameworkServlet 'dispatcherServlet': initialization started
2019-08-21 15:58:55 [http-nio-8080-exec-1] INFO  o.s.web.servlet.DispatcherServlet - FrameworkServlet 'dispatcherServlet': initialization completed in 65 ms

　　默认端口号是8080，我们在浏览器输入localhost:8080即可打开监控面板

　　接下来我们让服务提供方lxytrans-provider这个应用（原三板斧参见0.9.0.RELEASE版本的spring cloud alibaba nacos实例）接入到哨兵，只需在原三板斧的基础上给前面两板斧加上sentinel相关内容：

　　1、pom引入sentinel依赖：

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>

　　2、application引入sentinel dashboard地址：

#哨兵
spring.cloud.sentinel.transport.dashboard=localhost:8080

　　打完收工。启动应用后，再访问localhost:8080，发现微服务已经接入，只不过啥都木有而已：

　　

　　我们需要先访问一次接口，才能在sentinel dashboard上看到。那就先跑一把/hello和/hey吧：

　　再回去刷新下实时监控，hello出来了：

　　

　　我们点下“簇点链路”，在对应的资源右边点击流控进行流控规则设置，点击降级则是设置降级规则：

　　先试下流控。上面可以看到hello有3级资源，随便选一个点击流控：

　　这里我们配置流控规则是每秒并发请求数为3，超过了就直接拒绝。点击新增按钮后跳到流控规则页面：

 　　流控规则页面的右上角也可以直接添加规则的。现在我们通过jmeter来跑一个，jmeter设置线程数为4（具体设置参见jmeter使用经历）：

　　我们看到并发调用了4次hello接口，其中一次失败了，日志打印如下：

2019-08-22 13:02:14.651 |-ERROR [http-nio-8282-exec-10] org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].[dispatcherServlet] [175] -| Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.reflect.UndeclaredThrowableException] with root cause
com.alibaba.csp.sentinel.slots.block.flow.FlowException: null

　　接下来我们再另一个/hey接口，然后在“簇点链路”去设置降级规则：

　　这里我们配置/hey接口如果时延超过100毫秒，那么接下来的10秒内，我们讲拒绝请求。点击“新增”按钮后跳往降级规则页面：

 　　同样的，在这个页面右上角可以直接新增降级规则。我们在jmeter中新增一个/hey接口，禁用原来的/hello，再将线程数改为5，循环次数改为4，跑一把：

　　/hey接口的时延是2秒，仔细看下这20个接口的请求时间，分4批请求，每批间隔2秒。可以发现第一批5个是正常通过的，接下第2批前4个也是正常通过的，后面11个全被拒绝了。日志打印：

2019-08-22 13:12:03.245 |-ERROR [http-nio-8282-exec-2] org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].[dispatcherServlet] [175] -| Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.reflect.UndeclaredThrowableException] with root cause
com.alibaba.csp.sentinel.slots.block.degrade.DegradeException: null

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