Springboot连接nacos报错总结

springboot配置连接nacos分为五步：

1. 导入依赖

   如果发现以下的报错信息请检查：配置依赖时需要清楚配置的nacos版本和springboot版本是否互相支持。

   

   版本不一致会出no server available 没有可用的服务器报错信息：

   nacos registry, cloud-user-service register failed…NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr=’’, endpoint=’’, namespace=’’, watchDelay=30000, logName=’’, service=‘cloud-user-service’, weight=1.0, clusterName=‘DEFAULT’, namingLoadCacheAtStart=‘false’, metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip=‘192.168.109.1’, networkInterface=’’, port=8001, secure=false, accessKey=’’, secretKey=’’}},

   java.lang.IllegalArgumentException: no server available
   	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:438) ~[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-2.2.2.RELEASE.jar:2.2.2.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-2.2.2.RELEASE.jar:2.2.2.RELEASE]
   	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101) [spring-cloud-commons-2.2.2.RELEASE.jar:2.2.2.RELEASE]
   	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88) [spring-cloud-commons-2.2.2.RELEASE.jar:2.2.2.RELEASE]
   	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) [spring-cloud-commons-2.2.2.RELEASE.jar:2.2.2.RELEASE]
   	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) [spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) [spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) [spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) [spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:165) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
   	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
   	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
   	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
   	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
   	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
   	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
   	at com.wuyou.springcloud.UserService.main(UserService.java:11) [classes/:na]
   

   修改前的springboot版本

   

   查看了当前的nacos版本：

   ​

   参照GitHub上的nacos和springboot对应版本信息进行了修改：

   

2. 在启动类中加入@EnableDiscovery（由于springboot默认微服务都要注册，不添加也会注册）

3. 在application.yml中配置微服务的注册信息

   在微服务添加注册信息的时候需要留意配置的nacos路径是否正确

   

4. 在nacos导入配置文件

   需要获取的信息

   1. 配置文件所在的命名空间

   2. 配置文件所在的分组

   3. 配置文件的名称

      

5. 在bootstrap中读取nacos存放的配置文件相关信息（建议最好直接从nacos中粘贴下来）
   

   需要注意的是，这个两个配置不要搞混：

   
   spring.cloud.nacos.config.server-addr=127.0.0.1:8848 //在 bootstrap.properties 中配置 Nacos server 的地址和应用名
   spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848 //在 application.properties 中配置 Nacos server 的地址：