There is no use for a PID file under systemd. It just creates noise if nsd is unable to unlink it when the service is stopped:
nsd[27759]: warning: failed to unlink pidfile /run/nsd/nsd.pid: Permission denied
There is no use for a PID file under systemd. It just creates noise if nsd is unable to unlink it when the service is stopped:
nsd[27759]: warning: failed to unlink pidfile /run/nsd/nsd.pid: Permission denied