At the beginning of January I encountered a problem where
several vm guests on a single host somehow managed to see
the the virtual disks assigned to other guests on the same
hosts. I was unable to resolve this situation and
shutdown the affected guests after creating new guest
instances and moving the services and data off the
corrupted guests.
I have since removed these guests via virt-manager but all
attempts to remove from the host the logical volumes
associated with the former VirtIO disks fail. The volumes
are considered open by lvremove and nothing I have tried
can get them to close for removal. The --force option has
no effect on this situation.
# /sbin/lvremove -f /dev/vg_vhost01/lv_vm_base
Can't remove open logical volume "lv_vm_base"
# dmsetup info -c vg_vhost01-lv_vm_base
Name Maj Min Stat Open Targ Event UUID
vg_vhost01-lv_vm_base 253 5 L--w 2 1 0
LVM-gXMt00E1RDjpSX3INLZ35Prtg66aX36BeAOlKIkmfSNQRNol3Hni920R4YVaZr52
# dmsetup remove vg_vhost01-lv_vm_base
device-mapper: remove ioctl failed: Device or resource busy
Command failed
There are several bugs filed on similar issues and udev is
sometimes identified as the culprit. If I kill the udev
daemon with T=`pidof -x udevd`; kill $T and rerun the
lvremove -f command then I see this change in behaviour:
# /sbin/lvremove -f /dev/vg_vhost01/lv_vm_base
Found duplicate PV djM23m6YebBQ2xgPh9ORMtdX2iOu9xBQ:
using /dev/mapper/vg_vhost01-lv_vm_pas.harte--lyne.cap2
not
/dev/mapper/vg_vhost01-lv_vm_pgsql--dbms.harte--lyne.ca_00p2
Found duplicate PV djM23m6YebBQ2xgPh9ORMtdX2iOu9xBQ:
using /dev/mapper/vg_vhost01-lv_vm_basep2 not
/dev/mapper/vg_vhost01-lv_vm_pas.harte--lyne.cap2
Can't remove open logical volume "lv_vm_base"
I need to get this system stable and return the lost disk
space to the storage pool. Does anyone have any
suggestions as to how to proceed?
If I cannot solve this using the available system commands
then prudence dictates that I have to re-install the
server OS and rebuild all of the vm guests. As these
guests have been laboriously transferred from other hosts
during the past month this is a task I would rather not
have to do.
Any help is gratefully accepted.
--
*** E-Mail is NOT a SECURE channel ***
James B. Byrne mailto:ByrneJB@xxxxxxxxxxxxx
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
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