踩坑_Nacos_ 访问Nacos集群报错“failed to req API:/nacos/v1/ns/instance after all servers([10.100.100.9:9000])

问题描述：SpringCloud连接Nacos集群时报错如下（10.100.100.100.9:9000是配置的Nginx负载均衡入口，保证能通过10.100.100.100.9:9000访问nacos界面）：2020-12-03 17:10:16.168 ERROR 13228 --- [restartedMain] c.a.c.n.registry.NacosServiceRegistry:

彭率

4223人浏览 · 2020-12-03 17:40:36

彭率 · 2020-12-03 17:40:36 发布

问题描述：

SpringCloud连接Nacos集群时报错如下（10.100.100.100.9:9000是配置的Nginx负载均衡入口，保证能通过10.100.100.100.9:9000访问nacos界面）：

2020-12-03 17:10:16.168 ERROR 13228 --- [  restartedMain] c.a.c.n.registry.NacosServiceRegistry    : nacos registry, microservice-nacos-login register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='10.100.100.9:9000', endpoint='', namespace='', watchDelay=30000, logName='', service='microservice-nacos-login', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.130.80', networkInterface='', port=9001, secure=false, accessKey='', secretKey=''}},

java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([10.100.100.9:9000]) tried: failed to req API:10.100.100.9:9000/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: 拒绝连接 (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61) ~[spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:2.1.0.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239) [spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74) [spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:2.1.0.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138) [spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101) [spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88) [spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) [spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:165) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at com.penguin.cloud.MicroServiceLoginMain9001.main(MicroServiceLoginMain9001.java:14) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_161]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_161]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_161]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_161]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.2.RELEASE.jar:2.2.2.RELEASE]