开发环境

spring-boot：3.1.0， nacos:2.2.0, spring-cloud-alibaba:2022.0.0.0-RC2,

maven 配置

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.xx.xx</groupId>
    <artifactId>xx</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <java.version>17</java.version>
        <spring-cloud-alibaba.version>2022.0.0.0-RC2</spring-cloud-alibaba.version>
        <spring-cloud.version>2022.0.3</spring-cloud.version>
        <spring-boot.version>3.1.0</spring-boot.version>
    </properties>
     <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
          </dependencies>
       </dependencyManagement>
    </project>

nacos镜像

nacos/nacos-server:v2.2.0

spring boot 在k8s注册naocs启动报错信息

java.util.concurrent.ExecutionException: com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
	at com.alibaba.nacos.shaded.com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:566)
	at com.alibaba.nacos.shaded.com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:445)
	at com.alibaba.nacos.common.remote.client.grpc.GrpcClient.serverCheck(GrpcClient.java:218)
	at com.alibaba.nacos.common.remote.client.grpc.GrpcClient.connectToServer(GrpcClient.java:329)
	at com.alibaba.nacos.common.remote.client.RpcClient.reconnect(RpcClient.java:502)
	at com.alibaba.nacos.common.remote.client.RpcClient.lambda$start$2(RpcClient.java:343)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
	at com.alibaba.nacos.shaded.io.grpc.Status.asRuntimeException(Status.java:539)
	at com.alibaba.nacos.shaded.io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:544)
	at com.alibaba.nacos.shaded.io.grpc.internal.DelayedClientCall$DelayedListener$3.run(DelayedClientCall.java:471)
	at com.alibaba.nacos.shaded.io.grpc.internal.DelayedClientCall$DelayedListener.delayOrExecute(DelayedClientCall.java:435)
	at com.alibaba.nacos.shaded.io.grpc.internal.DelayedClientCall$DelayedListener.onClose(DelayedClientCall.java:468)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:563)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:744)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:723)
	at com.alibaba.nacos.shaded.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
	at com.alibaba.nacos.shaded.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
	... 3 common frames omitted
Caused by: com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: /192.168.60.130:32566
Caused by: java.net.ConnectException: Connection refused: no further information
	at java.base/sun.nio.ch.Net.pollConnect(Native Method)
	at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:672)
	at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:946)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:337)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:710)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:833)

问题原因

在nacos2.0.0以后，新增加开放9848，9849两个grpc端口，在k8s中开放外网访问时，我开放的端口号不是8848，而是看k8s默认给我生成的， 另外两个端口也是k8s随机生成的， 但是在spring boot 启动时，会根据nacos的默认地址的端口号加上100，所以spring boot 启动会报错以上信息。

问题解决

1.如果k8s时内外访问， 那需要开启9848和9849两个端口。
2. 如果需要注册nacos的外网地址，需要修改k8s里面nacos的服务配置，9848,9849映射的端口好需要在服务端口上加上100.

kind: Service
apiVersion: v1
metadata:
  name: nacos-wb
  namespace: gfc
  labels:
    app: nacos-wb
  annotations:
    kubesphere.io/creator: k8s-gz
    kubesphere.io/description: nacos-外部访问
spec:
  ports:
    - name: http-8848
      protocol: TCP
      port: 8848
      targetPort: 8848
      nodePort: 31566
    - name: http-9848
      protocol: TCP
      port: 9848
      targetPort: 9848
      nodePort: 32566
    - name: http-9849
      protocol: TCP
      port: 9849
      targetPort: 9849
      nodePort: 32567
  selector:
    app: nacos
    version: v1
  clusterIP: 10.233.47.118
  clusterIPs:
    - 10.233.47.118
  type: NodePort
  sessionAffinity: None
  externalTrafficPolicy: Cluster