java - 如何设置 spring-boot 以允许从外部 IP 地址访问网络服务器

Question

我一直在研究如何在 spring-boot 中设置 tomcat 以允许从外部 IP 地址访问。目前我可以从 locahost:port 查看 UI，但我无法从其他系统访问它。

http://localhost:8081 

当我登录到本地计算机时，它可以工作。

http://192.168.0.93:8081

当我登录到本地计算机并尝试 http://192.168.0.93:8081它不起作用。

我想通过另一台计算机的 IP 地址访问 UI，但它不起作用。

http://192.168.0.93:8081

当我查看 springs 文档时，我发现您可以添加您希望 tomcat 设置网络服务器以使用 server.address 的 IP 地址。这应该允许外部系统通过该 IP 地址访问服务器。

server.port=8082
server.address=192.168.0.93

如果我不提供地址，端口可以正常工作，但是当我提供地址并尝试运行它时，我遇到了绑定(bind)到该地址的问题。看起来 spring-boot 已经分配了 locahost:8082。

问题:

如何正确设置 spring-boot 以允许外部地址访问 tomact 并在本地访问时识别自己的 IP？

谢谢

堆栈跟踪:

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 org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:340)
  at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:765)
  at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:473)
  at org.apache.catalina.connector.Connector.startInternal(Connector.java:986)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
  at org.apache.catalina.core.StandardService.addConnector(StandardService.java:239)
  at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.addPreviouslyRemovedConnectors(TomcatEmbeddedServletContainer.java:194)
  at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.start(TomcatEmbeddedServletContainer.java:151)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.startEmbeddedServletContainer(EmbeddedWebApplicationContext.java:293)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:141)
  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
  at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766)
  at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180)
  at com.miw.mcb.server.ReactAndSpringDataRestApplication.main(ReactAndSpringDataRestApplication.java:18)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:478)
  at java.lang.Thread.run(Thread.java:745)
2016-05-25 11:24:30 - Failed to start connector [Connector[HTTP/1.1-8081]]
org.apache.catalina.LifecycleException: Failed to start component [Connector[HTTP/1.1-8081]]
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
  at org.apache.catalina.core.StandardService.addConnector(StandardService.java:239)
  at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.addPreviouslyRemovedConnectors(TomcatEmbeddedServletContainer.java:194)
  at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.start(TomcatEmbeddedServletContainer.java:151)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.startEmbeddedServletContainer(EmbeddedWebApplicationContext.java:293)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:141)
  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
  at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766)
  at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180)
  at com.miw.mcb.server.ReactAndSpringDataRestApplication.main(ReactAndSpringDataRestApplication.java:18)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:478)
  at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: service.getName(): "Tomcat";  Protocol handler start failed
  at org.apache.catalina.connector.Connector.startInternal(Connector.java:993)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
  ... 19 common frames omitted
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 org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:340)
  at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:765)
  at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:473)
  at org.apache.catalina.connector.Connector.startInternal(Connector.java:986)
  ... 20 common frames omitted
2016-05-25 11:24:30 - Pausing ProtocolHandler ["http-nio-192.168.0.93-8081"]
2016-05-25 11:24:30 - Stopping service Tomcat
2016-05-25 11:24:30 - The stop() method was called on component [StandardServer[-1]] after stop() had already been called. The second call will be ignored.
2016-05-25 11:24:30 - Stopping ProtocolHandler ["http-nio-192.168.0.93-8081"]
2016-05-25 11:24:30 - Destroying ProtocolHandler ["http-nio-192.168.0.93-8081"]
2016-05-25 11:24:30 - Application startup failed
org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat servlet container
  at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.start(TomcatEmbeddedServletContainer.java:165)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.startEmbeddedServletContainer(EmbeddedWebApplicationContext.java:293)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:141)
  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
  at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
  at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766)
  at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180)
  at com.miw.mcb.server.ReactAndSpringDataRestApplication.main(ReactAndSpringDataRestApplication.java:18)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:478)
  at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Tomcat connector in failed state
  at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.start(TomcatEmbeddedServletContainer.java:159)
  ... 16 common frames omitted

Answer 1

既然有这么多人看过这个问题。解决方法是确保在托管 CentOS 机器上正确配置了防火墙，并且没有明确设置服务器地址。

设置不正确

这失败之前防火墙设置不正确

server.port=8081
server.address=192.168.0.93

正确设置防火墙后您无需指定 server.address，只需指定端口。

正确设置

server.port=8081

这让我可以使用它的 ip 从其他系统正确访问应用程序。

http://<someip>:<server.port>
http://192.168.0.93:8081