You can check this by exec’ing into the pod and container and then running
lsof -i :8443
Get the PID from the above command output and use the following command to locate the process associated with the obtained PID.
ps -p PID
The command above will show which process is running on the port.
If you’re finding the container completes before you’re able to get in, simply run the steps in the run step instead or add a sleep command there accordingly before and / or after