Add systemd unit for udev deployments

mon/vitastor-osd@.service

@@ -0,0 +1,22 @@
+[Unit]
+Description=Vitastor object storage daemon osd.%i
+After=network-online.target local-fs.target time-sync.target
+Wants=network-online.target local-fs.target time-sync.target
+PartOf=vitastor.target
+
+[Service]
+LimitNOFILE=1048576
+LimitNPROC=1048576
+LimitMEMLOCK=infinity
+ExecStart=bash -c 'vitastor-disk exec-osd /dev/vitastor/osd%i-data >>/var/log/vitastor/osd%i.log 2>&1'
+ExecStartPre=+vitastor-disk pre-exec /dev/vitastor/osd%i-data
+WorkingDirectory=/
+User=vitastor
+PrivateTmp=false
+TasksMax=infinity
+Restart=always
+StartLimitInterval=0
+RestartSec=10
+
+[Install]
+WantedBy=vitastor.target