oleg@t510 0 /home/oleg $ cat /usr/lib/systemd/system/safebox.service
[Unit]
Description=Set /home/oleg/Safebox up
DefaultDependencies=false
Required=-.mount
[Service]
Type=simple
ConditionFileIsExecutable=/usr/lib/systemd/scripts/safebox-start
ConditionFileIsExecutable=/usr/lib/systemd/scripts/safebox-stop
ExecStart=/usr/lib/systemd/scripts/safebox-start
ExecStop=/usr/lib/systemd/scripts/safebox-stop
TimeoutSec=10
RemainAfterExit=yes

[Install]
WantedBy=local-fs.target
Also=systemd-udev-settle.service
oleg@t510 0 /home/oleg $ cat /usr/lib/systemd/scripts/safebox-start
#!/bin/sh
/usr/sbin/cryptsetup luksOpen --key-file=/root/safebox.key /root/safebox.container luks-safebox
/bin/mount -t ext4 -o user=oleg,group=oleg /dev/mapper/luks-safebox /home/oleg/Safebox
oleg@t510 0 /home/oleg $ cat /usr/lib/systemd/scripts/safebox-stop
#!/bin/sh
/bin/umount /home/oleg/Safebox
/usr/sbin/cryptsetup luksClose luks-safebox