nbdkit systemd socket and service file

nbdkit.service

# nbdkit.service

[Unit]
Description=nbdkit Service
After=nbdkit.socket
Requires=nbdkit.socket

[Service]
Environment="LD_LIBRARY_PATH=/opt/nbdkit/lib64"
Environment="TMPDIR=/var/lib/nbdkit/cache/"
User=nbdkit
ExecStart=/opt/nbdkit/sbin/nbdkit -f \
	--filter retry \
	ssh \
	host=ctnsrv-storage.uwaterloo.ca \
	user=ctnuser \
	path=/home/ctnuser/data/ctngpu2.raw \
	timeout=10 \
	retries=10

# nbdkit.socket

[Unit]
Description=NBDKit Network Block Device server
 
[Socket]
ListenStream=10809
 
[Install]
WantedBy=sockets.target