记录使用spring-cloud-starter-alibaba-nacos-config 注册到 nacos 时配置问题。

这里记录如何实现把消费者注册到Nacos并使用Nacos提供的配置管理。

报错提示：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.echoController': Injection of @Reference dependencies is failed; nested exception is java.lang.IllegalStateException: No registry config found or it's not a valid config! The registry config is: <dubbo:registry valid="false" zookeeperProtocol="false" prefix="dubbo.registry" />
at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor.postProcessPropertyValues(AnnotationInjectedBeanPostProcessor.java:151) ~[dubbo-2.7.3.jar:2.7.3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1416) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$1(AbstractBeanFactory.java:356) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:389) ~[spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE]
at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:186) ~[spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:353) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.cloud.context.scope.refresh.RefreshScope.eagerlyInitialize(RefreshScope.java:134) ~[spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE]
at org.springframework.cloud.context.scope.refresh.RefreshScope.start(RefreshScope.java:125) ~[spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE]
at org.springframework.cloud.context.scope.refresh.RefreshScope.onApplicationEvent(RefreshScope.java:119) ~[spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE]
at org.springframework.cloud.context.scope.refresh.RefreshScope.onApplicationEvent(RefreshScope.java:73) ~[spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:896) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552) ~[spring-context-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) [spring-boot-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) [spring-boot-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) [spring-boot-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at com.xjw.travel.business.BusinessRegApplication.main(BusinessRegApplication.java:13) [classes/:na]
Caused by: java.lang.IllegalStateException: No registry config found or it's not a valid config! The registry config is: <dubbo:registry valid="false" zookeeperProtocol="false" prefix="dubbo.registry" />
at org.apache.dubbo.config.AbstractInterfaceConfig.checkRegistry(AbstractInterfaceConfig.java:202) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:378) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:329) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:250) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor$ReferenceBeanInvocationHandler.init(ReferenceAnnotationBeanPostProcessor.java:269) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor$ReferenceBeanInvocationHandler.access$100(ReferenceAnnotationBeanPostProcessor.java:242) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.buildInvocationHandler(ReferenceAnnotationBeanPostProcessor.java:236) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.buildProxy(ReferenceAnnotationBeanPostProcessor.java:219) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.doGetInjectedBean(ReferenceAnnotationBeanPostProcessor.java:134) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor.getInjectedObject(AnnotationInjectedBeanPostProcessor.java:360) ~[dubbo-2.7.3.jar:2.7.3]
at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor$AnnotatedFieldElement.inject(AnnotationInjectedBeanPostProcessor.java:540) ~[dubbo-2.7.3.jar:2.7.3]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor.postProcessPropertyValues(AnnotationInjectedBeanPostProcessor.java:147) ~[dubbo-2.7.3.jar:2.7.3]
... 28 common frames omitted

目录结构

bootstrap.properties文件

spring.profiles.active=pro
spring.application.name=business-reg-config
spring.cloud.nacos.config.server-addr=192.168.138.9:8848
spring.cloud.nacos.config.file-extension=yaml

nacos配置列表

报错的为pro配置类。之所以出错是因为只有在创建配置列表时没有在Data ID文件加yaml

正确做法：

**

附录

以下代码为实现简单的springcloud alibaba dubbo 服务端注册到nacos并实现熔断，负载均衡。

**

pom.xml

<!-- Spring Cloud Alibaba Begin -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

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

<!-- Spring Cloud Alibaba End -->

business-reg-config-pro.yaml

base:
config:
nacos:
hostname: 47.112.252.218
port: 8848
sentile:
hostname: localhost
port: 8080

spring:
application:
name: business-reg
main:
allow-bean-definition-overriding: true
jackson:
time-zone: GMT+8
date-format: yyyy-MM-dd HH:mm:ss
cloud:
nacos:
discovery:
server-addr: ${base.config.nacos.hostname}:${base.config.nacos.port}
sentinel:
transport:
dashboard: ${base.config.sentile.hostname}:${base.config.sentile.port}

dubbo:
scan:
base-packages: com.xjw.travel.business
protocol:
name: dubbo
port: -1
serialization: kryo
registry:
address: nacos://${base.config.nacos.hostname}
port: ${base.config.nacos.port}

server:
port: 9002

management:
endpoints:
web:
exposure:
include: "*"

user:
name: "续集屋"

EchoController：

package com.xjw.travel.business.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.xjw.travel.business.controller.fallback.EchoControllerFallback;
import com.xjw.travel.provider.api.EchoService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
* @author xjw
*/
@RestController
@RequestMapping(value = "echo")
@RefreshScope
public class EchoController {

@Reference(version = "1.0.0")
private EchoService echoService;

@Value("${user.name}")
private String username;

@Value("${server.port}")
private String port;

@GetMapping(value = "{string}")
@SentinelResource(value = "echo", fallback = "echo",fallbackClass = EchoControllerFallback.class)
public String echo(@PathVariable String string) {

return echoService.echo(string) + " " + username + "服务端口："+ port;
}

}

EchoControllerFallback

package com.xjw.travel.business.controller.fallback;

public final class EchoControllerFallback  {

public static String echo(String string) {

return "echo fail.";

}
}