关于spring cloud eureka整合ribbon实现客户端的负载均衡
1. 实现eureka整合ribbon非常简单,
1.1.首先引入所需maven依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
</dependency>
1.2.在创建RestTemplate的Bean时加上@LoadBalanced注解
@Bean
@LoadBalanced // 为restTemplate
public RestTemplate restTemplate() {
return new RestTemplate();
}
1.3.在注入RestTemplate时加上@LoadBalanced注解
@Autowired
@LoadBalanced
private RestTemplate restTemplate;
这里要注意几点:
1.3.1.在注入RestTemplate时, 一定要加上@LoadBalanced注解,
1.3.2.在eureka整合了ribbon之后, 使用RestTemplate时, 第一个参数URL必须是服务生产者的spring.application.name:的值, 也就是服务生产者的serviceId
否则会报java.lang.IllegalStateException: No instances available for ********异常,如下:
java.lang.IllegalStateException: No instances available for 127.0.0.1
at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.execute(RibbonLoadBalancerClient.java:75) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor.intercept(LoadBalancerInterceptor.java:55) ~[spring-cloud-commons-1.2.2.RELEASE.jar:1.2.2.RELEASE]
at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.cloud.netflix.metrics.MetricsClientHttpRequestInterceptor.intercept(MetricsClientHttpRequestInterceptor.java:64) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:70) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:659) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:620) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:294) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.client.RestTemplate$$FastClassBySpringCGLIB$$aa4e9ed0.invoke(<generated>) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.cloud.netflix.metrics.RestTemplateUrlTemplateCapturingAspect.captureUrlTemplate(RestTemplateUrlTemplateCapturingAspect.java:33) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.client.RestTemplate$$EnhancerBySpringCGLIB$$b2d47b63.getForObject(<generated>) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at com.iot.dywl.demo.spring.cloud.eureka.movie.controller.MovieController.findUserByIdRestTemplate(MovieController.java:46) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110) ~[spring-boot-actuator-1.5.9.RELEASE.jar:1.5.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) ~[spring-boot-actuator-1.5.9.RELEASE.jar:1.5.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
关于spring cloud eureka整合ribbon实现客户端的负载均衡的更多相关文章
- SpringCloud系列七：使用Ribbon实现客户端侧负载均衡
1. 回顾 在前面,已经实现了微服务的注册与发现.启动各个微服务时,Eureka Client会把自己的网络信息注册到Eureka Server上. 但是,在生成环境中,各个微服务都会部署多个实例,因 ...
- 5.使用Ribbon实现客户端侧负载均衡
Ribbon实现客户端侧负载均衡 5.1. Ribbon简介 Ribbon是Netflix发布的开源项目,主要功能是提供客户端的软件负载均衡算法 ...
- Spring Cloud入门教程-Ribbon实现客户端负载均衡
简介 我们继续以之前博客的代码为基础,增加Ribbon组件来提供客户端负载均衡.负载均衡是实现高并发.高性能.可伸缩服务的重要组成部分,它可以把请求分散到一个集群中不同的服务器中,以减轻每个服务器的负 ...
- Spring Cloud 入门教程(五)： Ribbon实现客户端的负载均衡
接上节,假如我们的Hello world服务的访问量剧增,用一个服务已经无法承载, 我们可以把Hello World服务做成一个集群. 很简单,我们只需要复制Hello world服务,同时将原来的端 ...
- spring boot 2.0.3+spring cloud （Finchley）2、搭建负载均衡Ribbon （Eureka+Ribbon+RestTemplate）
Ribbon是Netflix公司开源的一个负载均衡组件,将负载均衡逻辑封装在客户端中,运行在客户端的进程里. 本例子是在搭建好eureka的基础上进行的,可参考spring boot 2.0.3+sp ...
- 一起来学Spring Cloud | 第三章：服务消费者 (负载均衡Ribbon)
一.负载均衡的简介: 负载均衡是高可用架构的一个关键组件,主要用来提高性能和可用性,通过负载均衡将流量分发到多个服务器,多服务器能够消除单个服务器的故障,减轻单个服务器的访问压力. 1.服务端负载均衡 ...
- 手把手带你利用Ribbon实现客户端的负载均衡
之前的文章<SpringCloud搭建注册中心与服务注册>介绍了注册中心的搭建和服务的注册,本文将介绍下服务消费者通过Ribbon调用服务实现负载均衡的过程. 本文目录 一.Ribbon服 ...
- spring cloud使用zuul实现反向代理和负载均衡
首先,这篇文章参考的是http://blog.didispace.com/springcloud5/这位大牛的博客.本人是通过这篇博客来学习zuul的,现在写的博客只是个人在学习时个人的一些感受和理解 ...
- Spring Cloud Eureka整合使用和配置
遵循SpringBoot三板斧 服务端 第一步加依赖 <dependency> <groupId>org.springframework.cloud</groupId&g ...
随机推荐
- 洛谷P2057 善意的投票
题目描述 幼儿园里有n个小朋友打算通过投票来决定睡不睡午觉.对他们来说,这个问题并不是很重要,于是他们决定发扬谦让精神.虽然每个人都有自己的主见,但是为了照顾一下自己朋友的想法,他们也可以投和自己本来 ...
- NOI导刊2010提高（06） 黑匣子
题目描述 Black Box是一种原始的数据库.它可以储存一个整数数组,还有一个特别的变量i.最开始的时候Black Box是空的．而i等于0.这个Black Box要处理一串命令. 命令只有两种: ...
- 《TCP/IP详解卷1：协议》——第4章 ARP：地址解析协议（转载）
章节回顾: 1.引言 当一台主机把以太网数据帧发送到位于同一局域网上的另一台主机时,是根据48 bit的以太网地址来确定目的接口的.设备驱动程序从不检查IP数据报中的目的IP地址.地址解析为这两种不同 ...
- python学习之-- Mysql 基础知识
数据库介绍及MYSQL基础操作了解 关系型数据库(RDBMS)是按照数据结构来组织,存储和管理数据的仓库.特点:1:数据以表格的形式出现2:每行为各种记录名称3:每列为记录名称所对应的数据域4:许多的 ...
- Fractal---POJ2083(dfs)
http://poj.org/problem?id=2083 一道我认为有点恶心的dfs 刚开始没有初始化 用G++交 一直TLE 后来用了C++竟然是wa 那这肯定是我的问题了 ...
- TList实现的任务队列
TList实现的任务队列 var g_tasks: TList; type PTRecvPack = ^TRecvPack; TRecvPack = record // 接收到的原数据 socket: ...
- Linux bash介绍与使用
Linux————bash的简单使用 对于一个操作系统来说,shell相当于内核kernel外的一层外壳,作为用户接口.一般来说,操作系统的接口分为两类:CLI:command line interf ...
- Thinking in Java -- 类型信息RTTI
Thinking in Java – 类型信息 个人感觉 java 中的比較难的部分了,在看了些netty源代码发现事实上这块很实用. 这章重点是RTTI和反射.先说下自己的理解 RTTI是执行时识别 ...
- Android AR场景拍照技术实现（有关键源代码）
ARVR技术交流群:129340649 欢迎增加. AR场景往往给别人留下的印象深刻,假设模型做的炫丽一点,效果将会更好. 那么怎样保存这一美好的情景呢?这篇文章将教你怎样实现AR场景的拍摄以及永久保 ...
- Django框架之路由
1,路由系统就是url系统,整个url系统就是请求进入Django项目的入口,每一个请求的种类由url分析完毕并再去返回相应的响应,它的本质是url与要为该url调用的视图函数之间的映射关系表(当项目 ...