在Docker中启动tomcat时无法在端口8080上打开网页 [英] Not open web page on port 8080 when start tomcat inside Docker

问题描述

在本地计算机Windows 10（64位）上，我启动docker Toolbox。然后我拉出Tomcat映像并像这样运行它：

On my local machine Windows 10 (64 bit) I start docker Toolbox. Then I pull Tomcat image and run it like this:

docker run -it tomcat

成功运行。

31-Dec-2019 17:54:27.598 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/ROOT]
31-Dec-2019 17:54:28.849 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/ROOT] has finished in [1,246] ms
31-Dec-2019 17:54:28.851 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/host-manager]
31-Dec-2019 17:54:29.029 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/host-manager] has finished in [178] ms
31-Dec-2019 17:54:29.031 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/docs]
31-Dec-2019 17:54:29.128 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/docs] has finished in [90] ms
31-Dec-2019 17:54:29.129 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/manager]
31-Dec-2019 17:54:29.251 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/manager] has finished in [122] ms
31-Dec-2019 17:54:29.254 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/examples]
31-Dec-2019 17:54:30.480 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/examples] has finished in [1,226] ms
31-Dec-2019 17:54:30.499 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]
31-Dec-2019 17:54:30.592 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
31-Dec-2019 17:54:30.621 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 3185 ms

但是当我打开浏览器并输入

But when I open my browser and input

http://127.0.0.1:8080/

但是找不到页面

为什么？

推荐答案

@DavidMaze是正确：您所描述的情况同时存在多个问题（至少两个，也许更多，请参见下文），每个问题都分别阻止Windows主机上的浏览器访问w部署在Docker容器中的eb应用程序：

@DavidMaze is right: there are simultaneously several issues (at least two, maybe more, see below) in the situation you describe, and each issue individually prevents a browser on the Windows host from accessing the web application deployed in the Docker container:

1. Web应用程序需要收听 0.0.0.0 特殊IP地址（不是 localhost ）。


2. -p docker run 的c>（-publish ）选项。假设网络应用监听了8080端口，然后将该暴露的端口发布到主机上的80端口： docker run -p 80：8080 […] （但两个端口可以相同）


3. 最后，在Windows上使用Docker Toolbox时，您需要确定可在其中使用网络应用程序的Docker Machine IP（不是 localhost ）：如果启动时Docker Toolbox没有直接显示此信息，则可能要运行： docker-machine ip dev 。

1. The web application needs to listen to the 0.0.0.0 special IP address (not localhost).
2. The -p (--publish) option of docker run is required. Let's say the web-app listens for port 8080, then to publish this exposed port to the 80 port on the host: docker run -p 80:8080 […] (but the two ports can be the same)
3. Finally as you use Docker Toolbox on Windows, you need to identify the Docker Machine IP where the web-app will be available (not localhost): if this information is not directly displayed by Docker Toolbox at startup, you may want to run: docker-machine ip dev.

了解更多详情

• 关于物品1. 2.，另请参见如何将Spring-Boot Web服务转换为Docker映像？


• 关于项目3，请参见例如无法使用我的docker映像访问Spring Boot


• （尽管这些线程可以处理对于Spring-Boot，其中的细节相当通用）



For more details

• Regarding items 1. 2., see also How to convert a Spring-Boot web service into a Docker image?
• Regarding item 3., see e.g. Can't access Spring Boot with my docker image
• (albeit these threads deal with Spring-Boot, the details there are quite generic)

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