These questions can easily devolve into philosophizing, so let me be concrete:
- There is open source software
Xlicensed under the GNU General Public License (v2 or later).
Xruns as a stand-alone Java socket server process, i.e.
java -cp x-gpl.jar edu.x.SocketServer -port 8000 …. No modifications needed nor done, this is how
Xworks out of the box.
- I'm calling this socket server from my own program
- Both the socket server
Xand my program
Yprocesses run inside Docker (Ubuntu Linux), launched from that Docker's
supervisord.confon container startup.
- I want to distribute this Docker image to 3rd parties, as a commercial proprietary application.
Now, the question is, is this particular combination of
Y and Docker in line with GPL v2 or later? Does it constitute derivate work, or aggregate work, in the GPL Section 5 sense? Does my program
Y or the entire distributed Docker image need to be licensed as GPL?
Happy to provide additional details if relevant, but please avoid irrelevant tangents. Thanks!
Other related (but overly generic) questions: