腾讯云远程连接Kafka

腾讯云服务器上部署Kafka，使用server.properties中公网IP配置：

启动时候报错：

ERROR [KafkaServer id=0] Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer)
kafka.common.KafkaException: Socket server failed to bind to 配置IP:9092: Cannot assign requested address.
    at kafka.network.Acceptor.openServerSocket(SocketServer.scala:404)
    at kafka.network.Acceptor.<init>(SocketServer.scala:308)
    at kafka.network.SocketServer.$anonfun$createAcceptorAndProcessors$1(SocketServer.scala:126)
    at kafka.network.SocketServer.$anonfun$createAcceptorAndProcessors$1$adapted(SocketServer.scala:122)
    at scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:59)
    at scala.collection.mutable.ResizableArray.foreach$(ResizableArray.scala:52)
    at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
    at kafka.network.SocketServer.createAcceptorAndProcessors(SocketServer.scala:122)
    at kafka.network.SocketServer.startup(SocketServer.scala:84)
    at kafka.server.KafkaServer.startup(KafkaServer.scala:247)
    at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:38)
    at kafka.Kafka$.main(Kafka.scala:92)
    at kafka.Kafka.main(Kafka.scala)
Caused by: java.net.BindException: Cannot assign requested address
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:433)
    at sun.nio.ch.Net.bind(Net.java:425)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:67)
    at kafka.network.Acceptor.openServerSocket(SocketServer.scala:400)
    ... 12 more

当把公网IP改为localhost时候，Kafka可以启动成功，但是无法远程访问。后来参考https://blog.csdn.net/weixin_42583093/article/details/86511891和https://blog.csdn.net/chenyulancn/article/details/79499401和https://blog.csdn.net/tengxing007/article/details/78276692了解到是由于云服务器中外网IP的端口要做内网的映射，一般是被占用了的，所以配置改为：

Spring中配置：