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devstack /files /lvm-backing-file.template
Jakob Meng accd99e7cd Made LVM backing disk persistent 
Previously, loop devices for LVM volume groups backing files were not
created after reboots, causing e.g. Cinder to fail with messages such
as
 ERROR cinder.service [-] Manager for service cinder-volume
 devstack@lvmdriver-1 is reporting problems, not sending
 heartbeat. Service will appear "down".
Now, we use systemd services to manage loop devices for backing files.
Change-Id: I27ec027834966e44aa9a99999358f5b4debc43e0
2022年02月08日 11:05:14 +01:00

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[Unit]
Description=Activate LVM backing file %BACKING_FILE%
DefaultDependencies=no
After=systemd-udev-settle.service
Before=lvm2-activation-early.service
Wants=systemd-udev-settle.service
[Service]
ExecStart=/sbin/losetup --find --show %DIRECTIO% %BACKING_FILE%
ExecStop=/bin/sh -c '/sbin/losetup -d $$(/sbin/losetup --associated %BACKING_FILE% -O NAME -n)'
RemainAfterExit=yes
Type=oneshot
[Install]
WantedBy=local-fs.target
Also=systemd-udev-settle.service