On Wed, Aug 15, 2018 at 10:30 PM Алексей Максимов <
aleksey.i.maksi...@yandex.ru> wrote:
> Hello Nir
>
> > To confirm this theory, please share the output of:
> > Top volume:
> > dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
> skip=16 iflag=direct
>
> DOMAIN=6db73566-0f7f-4438-a9ef-6815075f45ea
> CTIME=1533083673
> FORMAT=COW
> DISKTYPE=DATA
> LEGALITY=LEGAL
> SIZE=62914560
> VOLTYPE=LEAF
> DESCRIPTION=
> IMAGE=cdf1751b-64d3-42bc-b9ef-b0174c7ea068
> PUUID=208ece15-1c71-46f2-a019-6a9fce4309b2
> MTIME=0
> POOL_UUID=
> TYPE=SPARSE
> GEN=0
> EOF
> 1+0 records in
> 1+0 records out
> 512 bytes (512 B) copied, 0.000348555 s, 1.5 MB/s
>
>
> > Base volume:
> > dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
> skip=23 iflag=direct
>
>
> DOMAIN=6db73566-0f7f-4438-a9ef-6815075f45ea
> CTIME=1512474404
> FORMAT=COW
> DISKTYPE=2
> LEGALITY=LEGAL
> SIZE=62914560
> VOLTYPE=INTERNAL
> DESCRIPTION={"DiskAlias":"KOM-APP14_Disk1","DiskDescription":""}
> IMAGE=cdf1751b-64d3-42bc-b9ef-b0174c7ea068
> PUUID=00000000-0000-0000-0000-000000000000
> MTIME=0
> POOL_UUID=
> TYPE=SPARSE
> GEN=0
> EOF
> 1+0 records in
> 1+0 records out
> 512 bytes (512 B) copied, 0.00031362 s, 1.6 MB/s
>
>
> > Deleted volume?:
> > dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
> skip=15 iflag=direct
>
>
> NONE=######################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################
> EOF
> 1+0 records in
> 1+0 records out
> 512 bytes (512 B) copied, 0.000350361 s, 1.5 MB/s
>
This confirms that
6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
is a deleted volume.
To fix this VM, please remove this volume. Run these commands on the SPM
host:
systemctl stop vdsmd
lvremove
6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
systemctl start vdsmd
You should be able to create snapshot after that.
>
>
> 15.08.2018, 21:09, "Nir Soffer" <nsof...@redhat.com>:
> > On Wed, Aug 15, 2018 at 6:14 PM Алексей Максимов <
> aleksey.i.maksi...@yandex.ru> wrote:
> >> Hello Nir
> >>
> >> Thanks for the answer.
> >> The output of the commands is below.
> >>
> >>
> *********************************************************************************************************************************************
> >>> 1. Please share the output of this command on one of the hosts:
> >>> lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
> >>
> *********************************************************************************************************************************************
> >> # lvs -o vg_name,lv_name,tags | grep
> cdf1751b-64d3-42bc-b9ef-b0174c7ea068
> >>
> >> VG LV
> LV Tags
> >> ...
> >> 6db73566-0f7f-4438-a9ef-6815075f45ea
> 208ece15-1c71-46f2-a019-6a9fce4309b2
> IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
> >> 6db73566-0f7f-4438-a9ef-6815075f45ea
> 4974a4cc-b388-456f-b98e-19d2158f0d58
> IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
> >> 6db73566-0f7f-4438-a9ef-6815075f45ea
> 8c66f617-7add-410c-b546-5214b0200832
> IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
> >
> > So we have 2 volumes - 2 are base volumes:
> >
> > - 208ece15-1c71-46f2-a019-6a9fce4309b2
> IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
> > - 4974a4cc-b388-456f-b98e-19d2158f0d58
> IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
> >
> > And one is top volume:
> > - 8c66f617-7add-410c-b546-5214b0200832
> IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
> >
> > So according to vdsm, this is the chain:
> >
> > 208ece15-1c71-46f2-a019-6a9fce4309b2 <-
> 8c66f617-7add-410c-b546-5214b0200832 (top)
> >
> > The volume 4974a4cc-b388-456f-b98e-19d2158f0d58 is not part of this
> chain.
> >
> >>
> *********************************************************************************************************************************************
> >>> qemu-img info --backing /dev/vg_name/lv_name
> >>
> *********************************************************************************************************************************************
> >>
> >> # qemu-img info --backing
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
> >>
> >> image:
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
> >> file format: qcow2
> >> virtual size: 30G (32212254720 bytes)
> >> disk size: 0
> >> cluster_size: 65536
> >> Format specific information:
> >> compat: 1.1
> >> lazy refcounts: false
> >> refcount bits: 16
> >> corrupt: false
> >
> > This is the base volume according to vdsm and qemu, good.
> >
> >> # qemu-img info --backing
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
> >>
> >> image:
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
> >> file format: qcow2
> >> virtual size: 30G (32212254720 bytes)
> >> disk size: 0
> >> cluster_size: 65536
> >> backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
> >> backing file format: qcow2
> >> Format specific information:
> >> compat: 1.1
> >> lazy refcounts: false
> >> refcount bits: 16
> >> corrupt: false
> >>
> >> image:
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
> >> file format: qcow2
> >> virtual size: 30G (32212254720 bytes)
> >> disk size: 0
> >> cluster_size: 65536
> >> Format specific information:
> >> compat: 1.1
> >> lazy refcounts: false
> >> refcount bits: 16
> >> corrupt: false
> >
> > This is the deleted volume according to vdsm metadata. We can see that
> this volume
> > still has a backing file pointing to the base volume.
> >
> >> # qemu-img info --backing
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
> >>
> >> image:
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
> >> file format: qcow2
> >> virtual size: 30G (32212254720 bytes)
> >> disk size: 0
> >> cluster_size: 65536
> >> backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
> >> backing file format: qcow2
> >> Format specific information:
> >> compat: 1.1
> >> lazy refcounts: false
> >> refcount bits: 16
> >> corrupt: false
> >>
> >> image:
> /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
> >> file format: qcow2
> >> virtual size: 30G (32212254720 bytes)
> >> disk size: 0
> >> cluster_size: 65536
> >> Format specific information:
> >> compat: 1.1
> >> lazy refcounts: false
> >> refcount bits: 16
> >> corrupt: false
> >
> > This is top top volume.
> >
> > So I think this is what happened:
> >
> > You had this chain in the past:
> >
> > 208ece15-1c71-46f2-a019-6a9fce4309b2 <-
> 4974a4cc-b388-456f-b98e-19d2158f0d5 <- 8c66f617-7add-410c-b546-5214b0200832
> (top)
> >
> > You deleted a snapshot in engine, which created the new chain:
> >
> > 208ece15-1c71-46f2-a019-6a9fce4309b2 <-
> 8c66f617-7add-410c-b546-5214b0200832 (top)
> >
> <- 4974a4cc-b388-456f-b98e-19d2158f0d5 (deleted)
> >
> > Deleting 4974a4cc-b388-456f-b98e-19d2158f0d5 failed, but we cleared the
> metadata
> > of this volume.
> >
> > To confirm this theory, please share the output of:
> >
> > Top volume:
> >
> > dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
> skip=16 iflag=direct
> >
> > Base volume:
> >
> > dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
> skip=23 iflag=direct
> >
> > Deleted volume?:
> >
> > dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
> skip=15 iflag=direct
> > Nir
>
>
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