Solution to the problem of not being able to access the home page when adding a tomcat container to Docker

question

The tomcat container was successfully added using the docker run command. The port was also opened. I also tried to turn off the firewall, but it always displayed 404 when accessing the tomcat homepage.

reason

The default version of the tomcat image obtained using Alibaba Cloud is 8.5.51. Its webapps file is empty, and its welcome page is placed in the webapps.dist file. This is why we will access it incorrectly.

Workaround

Delete the original webapps or change its name to another one, and rename webapps.dist to webapps

The steps are as follows:

1. Enter the interactive mode with tomcat in docker

[root@localhost ~]# docker exec -it your tomcat container ID /bin/bash

root@b3589cdf16cc:/usr/local/tomcat#

2. Modify the directory

ls -lroot@b3589cdf16cc:/usr/local/tomcat# mv webapps webapps2

root@b3589cdf16cc:/usr/local/tomcat# mv webapps.dist

3. Exit interactive mode

webappsroot@b3589cdf16cc:/usr/local/tomcat# exit

Example:

Access port 32768 in the host machine, which will be mapped to port 8080 of tomcat

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