[linux-lvm] vgscan can't see LVM volumes on QEMU image
Roman Mashak
roman.mashak at gmail.com
Fri Oct 31 13:00:33 UTC 2014
Hi,
2014-10-31 5:48 GMT-04:00 Zdenek Kabelac <zkabelac at redhat.com>:
[skip]
>> I'm mostly sure noone has added support for nbd devices to lvm2.
>>
>> look into /etc/lvm/lvm.conf and add in device section something like:
>>
>> types = [ "nbd", 16 ]
>>
>
>
> Ahh ignore this please - I've been having wrong impression it's something
> new for qcow, but nbd is standard already support network block device.
>
> So what is the disk layout of your qcow ?
It has two partitions, root and swap.
> It's purely whole PV ?
> Have you tried to disable 'lvmetad' ?
After I disabled the daemon, vgscan has found the volume group on the
image and I could mount it;however I observed that after the vgscan
has completed, lvmetad has started running back again (probably it
doesn't hurt).
Please see below the output:
% vgscan -vvv
Setting activation/monitoring to 1
Processing: vgscan -vvv
O_DIRECT will be used
Setting global/locking_type to 1
Setting global/wait_for_locks to 1
File-based locking selected.
Setting global/locking_dir to /run/lock/lvm
Setting global/prioritise_write_locks to 1
Locking /run/lock/lvm/P_global WB
_do_flock /run/lock/lvm/P_global:aux WB
_do_flock /run/lock/lvm/P_global WB
_undo_flock /run/lock/lvm/P_global:aux
Metadata cache has no info for vgname: "#global"
Wiping cache of LVM-capable devices
/dev/sda: Added to device cache
/dev/disk/by-id/ata-WDC_WD10EZEX-75M2NA0_WD-WCC3F4935054:
Aliased to /dev/sda in device cache
/dev/disk/by-id/wwn-0x50014ee25f867e03: Aliased to /dev/sda in
device cache
/dev/sda1: Added to device cache
/dev/disk/by-id/ata-WDC_WD10EZEX-75M2NA0_WD-WCC3F4935054-part1:
Aliased to /dev/sda1 in device cache
/dev/disk/by-id/wwn-0x50014ee25f867e03-part1: Aliased to
/dev/sda1 in device cache
/dev/disk/by-uuid/1c1a9d75-070a-4c5b-8d66-24cae1141dd7:
Aliased to /dev/sda1 in device cache
/dev/sda2: Added to device cache
/dev/disk/by-id/ata-WDC_WD10EZEX-75M2NA0_WD-WCC3F4935054-part2:
Aliased to /dev/sda2 in device cache
/dev/disk/by-id/lvm-pv-uuid-DnkMt8-bu1E-7dJo-Sdcc-GlT6-sKec-FjFj1o:
Aliased to /dev/sda2 in device cache
/dev/disk/by-id/wwn-0x50014ee25f867e03-part2: Aliased to
/dev/sda2 in device cache
/dev/sr0: Added to device cache
/dev/cdrom: Aliased to /dev/sr0 in device cache (preferred name)
/dev/disk/by-id/ata-ASUS_DRW-24F1ST_a_S10K68EF300J0B: Aliased
to /dev/cdrom in device cache
/dev/nbd0: Added to device cache
/dev/nbd0p1: Added to device cache
/dev/nbd0p2: Added to device cache
/dev/nbd1: Added to device cache
/dev/nbd10: Added to device cache
/dev/nbd11: Added to device cache
/dev/nbd12: Added to device cache
/dev/nbd13: Added to device cache
/dev/nbd14: Added to device cache
/dev/nbd15: Added to device cache
/dev/nbd2: Added to device cache
/dev/nbd3: Added to device cache
/dev/nbd4: Added to device cache
/dev/nbd5: Added to device cache
/dev/nbd6: Added to device cache
/dev/nbd7: Added to device cache
/dev/nbd8: Added to device cache
/dev/nbd9: Added to device cache
/dev/dm-0: Added to device cache
/dev/disk/by-id/dm-name-fedora_nfv--s1-swap: Aliased to
/dev/dm-0 in device cache (preferred name)
/dev/disk/by-id/dm-uuid-LVM-KisoyqxG0iu1uFiZsLL7nVSSX0Ow8qwTYdLBLM9aOVskeq2PlKwTefSpNK2tdqi2:
Aliased to /dev/disk/by-id/dm-name-fedora_nfv--s1-swap in device cache
/dev/disk/by-uuid/fd91acd1-1ff8-4db9-a070-f999a387489c:
Aliased to /dev/disk/by-id/dm-name-fedora_nfv--s1-swap in device cache
/dev/fedora_nfv-s1/swap: Aliased to
/dev/disk/by-id/dm-name-fedora_nfv--s1-swap in device cache (preferred
name)
/dev/mapper/fedora_nfv--s1-swap: Aliased to
/dev/fedora_nfv-s1/swap in device cache
/dev/dm-1: Added to device cache
/dev/disk/by-id/dm-name-fedora_nfv--s1-root: Aliased to
/dev/dm-1 in device cache (preferred name)
/dev/disk/by-id/dm-uuid-LVM-KisoyqxG0iu1uFiZsLL7nVSSX0Ow8qwTQy5rPQnLskMuc0luyn5HeUAJcC4sHz0t:
Aliased to /dev/disk/by-id/dm-name-fedora_nfv--s1-root in device cache
/dev/disk/by-uuid/44fd9e97-274d-4536-b8f2-9a0d6e33a33a:
Aliased to /dev/disk/by-id/dm-name-fedora_nfv--s1-root in device cache
/dev/fedora_nfv-s1/root: Aliased to
/dev/disk/by-id/dm-name-fedora_nfv--s1-root in device cache (preferred
name)
/dev/mapper/fedora_nfv--s1-root: Aliased to
/dev/fedora_nfv-s1/root in device cache
/dev/dm-2: Added to device cache
/dev/disk/by-id/dm-name-fedora_nfv--s1-home: Aliased to
/dev/dm-2 in device cache (preferred name)
/dev/disk/by-id/dm-uuid-LVM-KisoyqxG0iu1uFiZsLL7nVSSX0Ow8qwTtNmpzJ9SfcvKnnvdlfdseL6QLUnvP5vA:
Aliased to /dev/disk/by-id/dm-name-fedora_nfv--s1-home in device cache
/dev/disk/by-uuid/c6b30418-b427-430d-916b-dceb4d08b5d9:
Aliased to /dev/disk/by-id/dm-name-fedora_nfv--s1-home in device cache
/dev/fedora_nfv-s1/home: Aliased to
/dev/disk/by-id/dm-name-fedora_nfv--s1-home in device cache (preferred
name)
/dev/mapper/fedora_nfv--s1-home: Aliased to
/dev/fedora_nfv-s1/home in device cache
Wiping internal VG cache
Metadata cache has no info for vgname: "#global"
Metadata cache has no info for vgname: "#orphans_lvm1"
Metadata cache has no info for vgname: "#orphans_lvm1"
lvmcache: initialised VG #orphans_lvm1
Metadata cache has no info for vgname: "#orphans_pool"
Metadata cache has no info for vgname: "#orphans_pool"
lvmcache: initialised VG #orphans_pool
Metadata cache has no info for vgname: "#orphans_lvm2"
Metadata cache has no info for vgname: "#orphans_lvm2"
lvmcache: initialised VG #orphans_lvm2
Reading all physical volumes. This may take a while...
Finding all volume groups
Asking lvmetad for complete list of known VGs
Setting response to OK
Setting response to OK
Asking lvmetad for VG 27jUR5-DR92-XsHx-MSvQ-VqRF-hTjO-ROxS6A
(name unknown)
Setting response to OK
Setting response to OK
Setting name to VolGroup
Setting metadata/format to lvm2
Metadata cache has no info for vgname: "VolGroup"
Setting id to aj9T9q-WEBL-mQ5y-LnGf-vLDZ-QOtB-8gHbqi
Setting format to lvm2
Setting device to 11010
Setting dev_size to 19945472
Setting label_sector to 1
Opened /dev/nbd0p2 RO O_DIRECT
/dev/nbd0p2: size is 19945472 sectors
Closed /dev/nbd0p2
/dev/nbd0p2: size is 19945472 sectors
Opened /dev/nbd0p2 RO O_DIRECT
/dev/nbd0p2: block size is 4096 bytes
/dev/nbd0p2: physical block size is 512 bytes
Closed /dev/nbd0p2
lvmcache: /dev/nbd0p2: now in VG #orphans_lvm2 (#orphans_lvm2)
with 0 mdas
Setting size to 1044480
Setting start to 4096
Setting ignore to 0
Allocated VG VolGroup at 0x7f35607a4dd0.
Metadata cache has no info for vgname: "VolGroup"
Metadata cache has no info for vgname: "VolGroup"
lvmcache: /dev/nbd0p2: now in VG VolGroup with 1 mdas
lvmcache: /dev/nbd0p2: setting VolGroup VGID to
27jUR5DR92XsHxMSvQVqRFhTjOROxS6A
Freeing VG VolGroup at 0x7f35607a4dd0.
Asking lvmetad for VG Kisoyq-xG0i-u1uF-iZsL-L7nV-SSX0-Ow8qwT
(name unknown)
Setting response to OK
Setting response to OK
Setting name to fedora_nfv-s1
Setting metadata/format to lvm2
Metadata cache has no info for vgname: "fedora_nfv-s1"
Setting id to DnkMt8-bu1E-7dJo-Sdcc-GlT6-sKec-FjFj1o
Setting format to lvm2
Setting device to 2050
Setting dev_size to 1952497664
Setting label_sector to 1
/dev/sda2: Device is a partition, using primary device
/dev/sda for mpath component detection
Opened /dev/sda2 RO O_DIRECT
/dev/sda2: size is 1952497664 sectors
Closed /dev/sda2
/dev/sda2: size is 1952497664 sectors
Opened /dev/sda2 RO O_DIRECT
/dev/sda2: block size is 4096 bytes
/dev/sda2: physical block size is 4096 bytes
Closed /dev/sda2
lvmcache: /dev/sda2: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mdas
Setting size to 1044480
Setting start to 4096
Setting ignore to 0
Allocated VG fedora_nfv-s1 at 0x7f35607a0570.
Metadata cache has no info for vgname: "fedora_nfv-s1"
Metadata cache has no info for vgname: "fedora_nfv-s1"
lvmcache: /dev/sda2: now in VG fedora_nfv-s1 with 1 mdas
lvmcache: /dev/sda2: setting fedora_nfv-s1 VGID to
KisoyqxG0iu1uFiZsLL7nVSSX0Ow8qwT
Freeing VG fedora_nfv-s1 at 0x7f35607a0570.
Finding volume group "fedora_nfv-s1"
Locking /run/lock/lvm/V_fedora_nfv-s1 RB
_do_flock /run/lock/lvm/V_fedora_nfv-s1:aux WB
_undo_flock /run/lock/lvm/V_fedora_nfv-s1:aux
_do_flock /run/lock/lvm/V_fedora_nfv-s1 RB
Asking lvmetad for VG Kisoyq-xG0i-u1uF-iZsL-L7nV-SSX0-Ow8qwT
(fedora_nfv-s1)
Setting response to OK
Setting response to OK
Setting name to fedora_nfv-s1
Setting metadata/format to lvm2
Setting id to DnkMt8-bu1E-7dJo-Sdcc-GlT6-sKec-FjFj1o
Setting format to lvm2
Setting device to 2050
Setting dev_size to 1952497664
Setting label_sector to 1
Setting size to 1044480
Setting start to 4096
Setting ignore to 0
Allocated VG fedora_nfv-s1 at 0x7f3560799170.
/dev/sda2 0: 0 2020: swap(0:0)
/dev/sda2 1: 2020 223521: home(0:0)
/dev/sda2 2: 225541 12800: root(0:0)
Allocated VG fedora_nfv-s1 at 0x7f356079d180.
Found volume group "fedora_nfv-s1" using metadata type lvm2
Freeing VG fedora_nfv-s1 at 0x7f35607a59b0.
Unlock: Memlock counters: locked:0 critical:0 daemon:0 suspended:0
Syncing device names
Unlocking /run/lock/lvm/V_fedora_nfv-s1
_undo_flock /run/lock/lvm/V_fedora_nfv-s1
Freeing VG fedora_nfv-s1 at 0x7f356079d180.
Freeing VG fedora_nfv-s1 at 0x7f3560799170.
Finding volume group "VolGroup"
Locking /run/lock/lvm/V_VolGroup RB
_do_flock /run/lock/lvm/V_VolGroup:aux WB
_undo_flock /run/lock/lvm/V_VolGroup:aux
_do_flock /run/lock/lvm/V_VolGroup RB
Asking lvmetad for VG 27jUR5-DR92-XsHx-MSvQ-VqRF-hTjO-ROxS6A (VolGroup)
Setting response to OK
Setting response to OK
Setting name to VolGroup
Setting metadata/format to lvm2
Setting id to aj9T9q-WEBL-mQ5y-LnGf-vLDZ-QOtB-8gHbqi
Setting format to lvm2
Setting device to 11010
Setting dev_size to 19945472
Setting label_sector to 1
Setting size to 1044480
Setting start to 4096
Setting ignore to 0
Allocated VG VolGroup at 0x7f3560799170.
/dev/nbd0p2 0: 0 2178: lv_root(0:0)
/dev/nbd0p2 1: 2178 256: lv_swap(0:0)
Allocated VG VolGroup at 0x7f356079d180.
Found volume group "VolGroup" using metadata type lvm2
Freeing VG VolGroup at 0x7f35607a59b0.
Unlock: Memlock counters: locked:0 critical:0 daemon:0 suspended:0
Syncing device names
Unlocking /run/lock/lvm/V_VolGroup
_undo_flock /run/lock/lvm/V_VolGroup
Freeing VG VolGroup at 0x7f356079d180.
Freeing VG VolGroup at 0x7f3560799170.
Unlocking /run/lock/lvm/P_global
_undo_flock /run/lock/lvm/P_global
Metadata cache has no info for vgname: "#global"
Completed: vgscan -vvv
%
> What is the lvm2 version in use here ?
Where can I find this information?
--
Roman Mashak
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