zramraid/zramraid.deb/lib/systemd/system/zramraid.service

[Unit]
SourcePath=/etc/zramraid/zramraid-maker
Description=zram raid system
Before=libvirt-guests.service libvirtd.service runlevel2.target runlevel3.target runlevel4.target runlevel5.target shutdown.target 
After=dbus.service iscsid.service apparmor.service local-fs.target
Conflicts=shutdown.target 

[Service]
Type=oneshot
ExecStart=/etc/init.d/zramraid-manager start
ExecStop=/etc/init.d/zramraid-manager stop

[Install]
WantedBy=multi-user.target