[ovirt-users] Disk from FC storage not removed

[Nir Soffer]

On Mon, Jun 13, 2016 at 12:06 PM, Krzysztof Dajka <alteriks at gmail.com> wrote:
> Hi Nir,
>
> Thanks for solution. I didn't notice the guest /dev/backupvg01/backuplv01 on
> all hypervisors. It seems that I've got this issue with 2 additionals
> volumes, but no one noticed because they were only few gb.
>
>
> [root at wrops2 BLUE/WRO ~]# ls -l /sys/block/$(basename $(readlink
> /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8))/holders
> total 0
> lrwxrwxrwx. 1 root root 0 Jun 13 10:48 dm-43 -> ../../dm-43
>
> [root at wrops2 BLUE/WRO ~]# pvscan --cache
> [root at wrops2 BLUE/WRO ~]# vgs -o pv_name,vg_name
>   PV
> VG
>
> /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8
> backupvg01
>   /dev/sda2
> centos_wrops2
>
> /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/99a1c067-9728-484a-a0cb-cb6689d5724c
> deployvg
>   /dev/mapper/3600000e00d0000000024057200000000
> e69d1c16-36d1-4375-aaee-69f5a5ce1616
>
> /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/86a6d83f-2661-4fe3-8874-ce4d8a111c0d
> jenkins
>   /dev/sda3
> w2vg1
>
> [root at wrops2 BLUE/WRO ~]# dmsetup info
> Name:              backupvg01-backuplv01
> State:             ACTIVE
> Read Ahead:        8192
> Tables present:    LIVE
> Open count:        0
> Event number:      0
> Major, minor:      253, 43
> Number of targets: 1
> UUID: LVM-ubxOH5R2h6B8JwLGfhpiNjnAKlPxMPy6KfkeLBxXajoT3gxU0yC5JvOQQVkixrTA
>
> [root at wrops2 BLUE/WRO ~]# lvchange -an /dev/backupvg01/backuplv01
> [root at wrops2 BLUE/WRO ~]# lvremove
> /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8
> Do you really want to remove active logical volume
> ee53af81-820d-4916-b766-5236ca99daf8? [y/n]: y
>   Logical volume "ee53af81-820d-4916-b766-5236ca99daf8" successfully removed
>
>
> Would this configuration in lvm.conf:
> filter = [ "r|/dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/.*|" ]
> on all hypervisors solve problem of scanning guest volumes?

I would use global_filter, to make sure that commands using filter
from the command line do not override your filter. vdsm is such
application, using --config 'devices { filter = ... }'

Nir

>
> 2016-06-11 23:16 GMT+02:00 Nir Soffer <nsoffer at redhat.com>:
>>
>> On Thu, Jun 9, 2016 at 11:46 AM, Krzysztof Dajka <alteriks at gmail.com>
>> wrote:
>> > Hi,
>> >
>> > Recently I tried to delete 1TB disk created on top ~3TB LUN from
>> > ovirtengine.
>> > Disk is preallocated and I backuped data to other disk so I could
>> > recreate
>> > it once again as thin volume. I couldn't remove this disk when it was
>> > attached to a VM. But once I detached it I could remove it permanently.
>> > The
>> > thing is it only disappeared from ovirtengine GUI.
>> >
>> > I've got 4 hosts with FC HBA attached to storage array and all of them
>> > are
>> > saying that this 1TB disk which should be gone is opened by all hosts
>> > simultaneously.
>> >
>> > [root at wrops1 BLUE ~]# lvdisplay -m
>> >
>> > /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8
>> >   --- Logical volume ---
>> >   LV Path
>> >
>> > /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8
>> >   LV Name                ee53af81-820d-4916-b766-5236ca99daf8
>> >   VG Name                e69d1c16-36d1-4375-aaee-69f5a5ce1616
>> >   LV UUID                sBdBRk-tNyZ-Rval-F4lw-ka6X-wOe8-AQenTb
>> >   LV Write Access        read/write
>> >   LV Creation host, time wrops1.blue, 2015-07-31 10:40:57 +0200
>> >   LV Status              available
>> >   # open                 1
>> >   LV Size                1.00 TiB
>> >   Current LE             8192
>> >   Segments               1
>> >   Allocation             inherit
>> >   Read ahead sectors     auto
>> >   - currently set to     8192
>> >   Block device           253:29
>> >
>> >   --- Segments ---
>> >   Logical extents 0 to 8191:
>> >     Type                linear
>> >     Physical volume     /dev/mapper/3600000e00d0000000024057200000000
>> >     Physical extents    8145 to 16336
>> >
>> > Deactivating LV doesn't work:
>> > [root at wrops1 BLUE ~]# lvchange -an
>> >
>> > /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8
>> >   Logical volume
>> >
>> > e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8 is
>> > used by another device.
>>
>> Looks like your lv is used as a physical volume on another vg - probably
>> a vg created on a guest. Lvm and systemd are trying hard to discover
>> stuff on multipath devices and expose anything to the hypervisor.
>>
>> Can you share the output of:
>>
>>     ls -l /sys/block/$(basename $(readlink
>>
>> /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8))/holders
>>
>> And:
>>
>>     pvscan --cache
>>     vgs -o pv_name,vg_name
>>
>> Nir
>>
>> > Removing from hypervisor doesn't work either.
>> > [root at wrops1 BLUE ~]# lvremove --force
>> >
>> > /dev/e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8
>> >   Logical volume
>> >
>> > e69d1c16-36d1-4375-aaee-69f5a5ce1616/ee53af81-820d-4916-b766-5236ca99daf8 is
>> > used by another device.
>> >
>> > I tried and rebooted one host and as soon as it booted the volume became
>> > opened once again. Lsof on all hosts doesn't give anything meaningful
>> > regarding this LV. As opposed to other LV which are used by qemu-kvm.
>> >
>> > Has anyone encountered similar problem? How can I remove this LV?
>> >
>> > _______________________________________________
>> > Users mailing list
>> > Users at ovirt.org
>> > http://lists.ovirt.org/mailman/listinfo/users
>> >
>
>