SpringCloud+Consul 服务注册与服务发现

2026-06-01 2 花语

本文内容纲要：

-SpringCloud+Consul服务注册与服务发现

SpringCloud+Consul服务注册与服务发现

1.服务注册：

在Spring.factories有一段：

#DiscoveryClientConfiguration org.springframework.cloud.client.discovery.EnableDiscoveryClient=\ org.springframework.cloud.consul.discovery.ConsulDiscoveryClientConfiguration

这是SpringCloud时Consul实现服务注册的关键。

发现有一个ConsulLifecycle的bean注入： @Bean @ConditionalOnMissingBean(search=SearchStrategy.CURRENT) publicConsulLifecycleconsulLifecycle(ConsulDiscoveryPropertiesdiscoveryProperties, HeartbeatPropertiesheartbeatProperties){ ConsulLifecyclelifecycle=newConsulLifecycle(consulClient,discoveryProperties,heartbeatProperties); if(this.ttlScheduler!=null){ lifecycle.setTtlScheduler(this.ttlScheduler); } if(this.servletContext!=null){ lifecycle.setServletContext(this.servletContext); } if(this.serverProperties!=null&&this.serverProperties.getPort()!=null&&this.serverProperties.getPort()>0){ //noneedtowaitforeventsforthistostartsincetheuserhasexplicitlysettheport. lifecycle.setPort(this.serverProperties.getPort()); } returnlifecycle; }

ConsulLifecycle继承自AbstractDiscoveryLifecycle,而AbstractDiscoveryLifecycle实现了ApplicationListener接口，即在容器初始化完成后会调用onApplicationEvent方法。会调用start方法。最终调用register方法注册服务。注意stat()方法的定义：

@Override @Retryable(interceptor="consulRetryInterceptor") publicvoidstart(){ super.start(); }

是支持重新注册的。

//第一个配置 spring: cloud: consul: host:localhost port:8500 discovery: tags:dev instance-id:cosulservice service-name:app application: name:cosulservice server: port:8088 //第二个配置 spring: cloud: consul: host:localhost port:8500 discovery: #health-check-path:/health #health-check-interval:15s tags:dev instance-id:cosulservice2 service-name:app application: name:cosulservice server: port:8088

运行两个应用，注册，查看consul中相关服务：

app Tags dev Nodes node-client-v-5-1172.17.0.82passing Serviceappcheckservice:cosulservice2 passing SerfHealthStatusserfHealth passing node-client-v-5-1172.17.0.82passing Serviceappcheckservice:cosulservice passing SerfHealthStatusserfHealth

注册两个服务。服务均为app。至此已经两个服务已经注册。

2.服务发现： @Bean @ConditionalOnMissingBean publicConsulDiscoveryClientconsulDiscoveryClient(ConsulLifecycleconsulLifecycle, ConsulDiscoveryPropertiesdiscoveryProperties){ ConsulDiscoveryClientdiscoveryClient=newConsulDiscoveryClient(consulClient, consulLifecycle,discoveryProperties); discoveryClient.setServerProperties(serverProperties);//nullok returndiscoveryClient; } @RequestMapping("/services") publicObjectservices(){ returndiscoveryClient.getInstances("app"); }

简单的单元测试：

@Test publicvoidtestServicess()throwsException{ mockMvc.perform(MockMvcRequestBuilders.get("/services").contentType(MediaType.APPLICATION_JSON_UTF8)).andDo(newResultHandler(){ @Override publicvoidhandle(MvcResultresult)throwsException{ System.out.println(result.getResponse().getContentAsString()); } }); } [{"serviceId":"app","host":"192.168.1.103","port":8088,"secure":false,"metadata":{"dev":"dev"},"uri":"http://192.168.1.103:8088"},{"serviceId":"app","host":"192.168.1.103","port":8080,"secure":false,"metadata":{"dev":"dev"},"uri":"http://192.168.1.103:8080"}]

本文内容总结：SpringCloud+Consul服务注册与服务发现，

原文链接：https://www.cnblogs.com/dragonfei/p/6243297.html