Debugging Tomcat in Docker container

Question

This is the command I use for this:

docker run -it --rm \
  -e JPDA_ADDRESS=8000 \
  -e JPDA_TRANSPORT=dt_socket \
  -p 8888:8080 \
  -p 9000:8000 \
  -v D:/tc/conf/tomcat-users.xml:/usr/local/tomcat/conf/tomcat-users.xml \
  tomcat:8.0 \
  /usr/local/tomcat/bin/catalina.sh jpda run

Explanation

-e JPDA_ADDRESS=8000
debugging port in container, passed as environment variable
-e JPDA_TRANSPORT=dt_socket
transport type for debugging as socket, passed as environment variable
-p 8888:8080
expose tomcat port 8080 on host as port 8888
-p 9000:8000
expose java debugging port 8000 on host as port 9000
-v {host-file}:{container-file}
overwrite tomcat-user.xml with my local on, since I need access to the manager api
omit this line if this isn’t necessary for your use case
tomcat:8.0
see https://hub.docker.com/_/tomcat/
/usr/local/tomcat/bin/catalina.sh jpda run
command to run in the container

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