Miniscule is a tiny TCP command server that can be used to trigger local commands on the host it's running on. It uses netcat to listen to a TCP socket and coprocesses for the read and write streams.
The code contains termination of a DCOS slave node as an example since I have used this approach for cluster node lifecycle management. You can simply replace this with whatever you need though.
To start Minuscule, just execute it with the port you want to listen on.
$ minuscule 5039When exchanging messages with Minuscule, the server expects the following messaging format. All messages must be terminated with a new-line \n.
<COMMAND><TERMINATION>
The first segment specifies if the request was succesful. It's 0 if it was successful and 1 if not.
<0|1>:<ERROR_CODE|MESSAGE><TERMINATION>
TERMINATE Sends SIGUSR1 to the Mesos slave process and tells systemctl to stop the service
100 The command is invalid
200 A sub-command execution failed with a non-zero exit code