How do I run a listening program (specifically unoconv as a listener) inside a container using systemd-nspawn, so that it can run in the background (without a console) and be reached by other processes? For example in a perfect world it would be as easy as this:# something like this to start the container and program in backgroundsystemd-nspawn -D <container path> --background <unoconv --listener> # something like this to connect to container and execute commandsystemd-run --machine <machine name> <unoconv -f pdf file.txt>The furthest I've got so far is using this guide, which gets the container running in the background with machinectl. However sudo systemd-run --machine <machine name> ls fails with the error:Failed to create bus connection: Permission denied.My question is two-fold. One, can you solve this error? Or two (preferably) can you give me a simpler way to start and connect to a container and run commands?(I'm running Ubuntu Xenial on a secure machine with no internet access)
How to start a program in a container as a service using systemd-nspawn, systemd-run?
ubuntu;systemd;container;containers;systemd nspawn