st2ctl assumes it's running in a VM environment and wasn't designed to be executed inside the Docker. We'll need to improve that.

Because listing processes or starting services is not viable in a Docker environment, where each service runs in its own Docker container, st2ctl needs a simple modification so it doesn't try to query list of processes but instead suggest to use Docker cmd.

Example commands which don't work in Docker environment:

• st2ctl status
• st2ctl stop
• st2ctl start
• st2ctl restart
• st2ctl restart-component
• st2ctl reopen-log-files
• st2ctl reload lists running processes as well