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* [linux-lvm] vgscan can't see LVM volumes on QEMU image
@ 2014-10-31  1:17 Roman Mashak
  2014-10-31  9:36 ` Zdenek Kabelac
  0 siblings, 1 reply; 8+ messages in thread
From: Roman Mashak @ 2014-10-31  1:17 UTC (permalink / raw)
  To: linux-lvm

Hello,

I want to mount QEMU image of qcow2 type on Fedora 20 host. Here is
what commands I executed, according to the advices at
http://docs.openstack.org/image-guide/content/ch_modifying_images.html:

% modprobe nbd max_part=16
% qemu-nbd -c /dev/nbd0 image.qcow2
% partprobe /dev/nbd0
% 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 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 0x7f985779d4c0.
        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 0x7f985779d4c0.
    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 0x7f98577920b0.
        /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 0x7f98577960c0.
  Found volume group "fedora_nfv-s1" using metadata type lvm2
        Freeing VG fedora_nfv-s1 at 0x7f985779e0e0.
        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 0x7f98577960c0.
        Freeing VG fedora_nfv-s1 at 0x7f98577920b0.
      Unlocking /run/lock/lvm/P_global
        _undo_flock /run/lock/lvm/P_global
        Metadata cache has no info for vgname: "#global"
        Completed: vgscan -vvv
%

The volume group 'fedora_nfv-s1' actually exists on the host where I
run the commands, i.e. /dev/sda* but nothing reported about /dev/nbd*
although <image.qcow2> carries centos-6.5 with lvm in it.

vgscan is part of package lvm2-2.02.106-1.fc20.x86_64

I would appreciate helpful advises. Thanks.

-- 
Roman Mashak

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] vgscan can't see LVM volumes on QEMU image
  2014-10-31  1:17 [linux-lvm] vgscan can't see LVM volumes on QEMU image Roman Mashak
@ 2014-10-31  9:36 ` Zdenek Kabelac
  2014-10-31  9:48   ` Zdenek Kabelac
  0 siblings, 1 reply; 8+ messages in thread
From: Zdenek Kabelac @ 2014-10-31  9:36 UTC (permalink / raw)
  To: LVM general discussion and development

Dne 31.10.2014 v 02:17 Roman Mashak napsal(a):
> Hello,
>
> I want to mount QEMU image of qcow2 type on Fedora 20 host. Here is
> what commands I executed, according to the advices at
> http://docs.openstack.org/image-guide/content/ch_modifying_images.html:
>
> % modprobe nbd max_part=16
> % qemu-nbd -c /dev/nbd0 image.qcow2
> % partprobe /dev/nbd0


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 ]


Zdenek

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] vgscan can't see LVM volumes on QEMU image
  2014-10-31  9:36 ` Zdenek Kabelac
@ 2014-10-31  9:48   ` Zdenek Kabelac
  2014-10-31 13:00     ` Roman Mashak
  0 siblings, 1 reply; 8+ messages in thread
From: Zdenek Kabelac @ 2014-10-31  9:48 UTC (permalink / raw)
  To: LVM general discussion and development

Dne 31.10.2014 v 10:36 Zdenek Kabelac napsal(a):
> Dne 31.10.2014 v 02:17 Roman Mashak napsal(a):
>> Hello,
>>
>> I want to mount QEMU image of qcow2 type on Fedora 20 host. Here is
>> what commands I executed, according to the advices at
>> http://docs.openstack.org/image-guide/content/ch_modifying_images.html:
>>
>> % modprobe nbd max_part=16
>> % qemu-nbd -c /dev/nbd0 image.qcow2
>> % partprobe /dev/nbd0
>
>
> 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's purely whole PV ?

Have you tried  to disable 'lvmetad' ?

What is the lvm2 version in use here ?

Zdenek

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] vgscan can't see LVM volumes on QEMU image
  2014-10-31  9:48   ` Zdenek Kabelac
@ 2014-10-31 13:00     ` Roman Mashak
  2014-10-31 14:13       ` Marian Csontos
  2014-10-31 14:18       ` Peter Rajnoha
  0 siblings, 2 replies; 8+ messages in thread
From: Roman Mashak @ 2014-10-31 13:00 UTC (permalink / raw)
  To: LVM general discussion and development

Hi,

2014-10-31 5:48 GMT-04:00 Zdenek Kabelac <zkabelac@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

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] vgscan can't see LVM volumes on QEMU image
  2014-10-31 13:00     ` Roman Mashak
@ 2014-10-31 14:13       ` Marian Csontos
  2014-10-31 14:50         ` Roman Mashak
  2014-10-31 14:18       ` Peter Rajnoha
  1 sibling, 1 reply; 8+ messages in thread
From: Marian Csontos @ 2014-10-31 14:13 UTC (permalink / raw)
  To: LVM general discussion and development; +Cc: Peter Rajnoha

On 10/31/2014 02:00 PM, Roman Mashak wrote:
> Hi,
>
> 2014-10-31 5:48 GMT-04:00 Zdenek Kabelac <zkabelac@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;

To me looks like `pvscan --cache` is not called on NBD devices as they 
appear.

Could you post udev db dump for /dev/nbd0 and /dev/nbd0p1?

     udevadm info --name=$NAME --query=all

 > however I observed that after the vgscan
> has completed, lvmetad has started running back again (probably it
> doesn't hurt).

How did you disable it?

It has to be disabled in lvm.conf. If you only stopped it, it is a 
socket activated service and will be restarted (at least on recent 
Fedora and RHEL.)

> 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?

On RPM based systems: `rpm -q lvm2`
Elsewhere: `lvm version`

>

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] vgscan can't see LVM volumes on QEMU image
  2014-10-31 13:00     ` Roman Mashak
  2014-10-31 14:13       ` Marian Csontos
@ 2014-10-31 14:18       ` Peter Rajnoha
  2014-10-31 14:49         ` Roman Mashak
  1 sibling, 1 reply; 8+ messages in thread
From: Peter Rajnoha @ 2014-10-31 14:18 UTC (permalink / raw)
  To: roman.mashak; +Cc: LVM general discussion and development

On 10/31/2014 02:00 PM, Roman Mashak wrote:
> Hi,
> 
> 2014-10-31 5:48 GMT-04:00 Zdenek Kabelac <zkabelac@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).

OK, so that's certainly a problem with pvscan not run from udev for
nbd devices at proper time - we still need to fix this - we haven't
covered this yet properly. It needs special treatment like we do
in /lib/udev/rules.d/69-dm-lvm-metad.rules for MD and loop devs.

The lvmetad running back - have you also disabled lvmetad in lvm.conf
(use_lvmetad=0)?


>> What is the lvm2 version in use here ?
> 
> Where can I find this information?
> 

Just run "lvm version"

-- 
Peter

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] vgscan can't see LVM volumes on QEMU image
  2014-10-31 14:18       ` Peter Rajnoha
@ 2014-10-31 14:49         ` Roman Mashak
  0 siblings, 0 replies; 8+ messages in thread
From: Roman Mashak @ 2014-10-31 14:49 UTC (permalink / raw)
  To: LVM general discussion and development

Hi Peter,

2014-10-31 10:18 GMT-04:00 Peter Rajnoha <prajnoha@redhat.com>:
[skip]
>> 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).
>
> OK, so that's certainly a problem with pvscan not run from udev for
> nbd devices at proper time - we still need to fix this - we haven't
> covered this yet properly. It needs special treatment like we do
> in /lib/udev/rules.d/69-dm-lvm-metad.rules for MD and loop devs.
>
> The lvmetad running back - have you also disabled lvmetad in lvm.conf
> (use_lvmetad=0)?

Thanks, I didn't disable use_lvmetad in lvm.conf.

>
>>> What is the lvm2 version in use here ?
>>
>> Where can I find this information?
>>
>
> Just run "lvm version"

% lvm version
  LVM version:     2.02.106(2) (2014-04-10)
  Library version: 1.02.85 (2014-04-10)
  Driver version:  4.27.0
%

-- 
Roman Mashak

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] vgscan can't see LVM volumes on QEMU image
  2014-10-31 14:13       ` Marian Csontos
@ 2014-10-31 14:50         ` Roman Mashak
  0 siblings, 0 replies; 8+ messages in thread
From: Roman Mashak @ 2014-10-31 14:50 UTC (permalink / raw)
  To: LVM general discussion and development

Hi Marian,

2014-10-31 10:13 GMT-04:00 Marian Csontos <mcsontos@redhat.com>:
[skip]
> To me looks like `pvscan --cache` is not called on NBD devices as they
> appear.
>
> Could you post udev db dump for /dev/nbd0 and /dev/nbd0p1?
>
>     udevadm info --name=$NAME --query=all

% udevadm info --name=/dev/nbd0 --query=all
P: /devices/virtual/block/nbd0
N: nbd0
E: DEVNAME=/dev/nbd0
E: DEVPATH=/devices/virtual/block/nbd0
E: DEVTYPE=disk
E: MAJOR=43
E: MINOR=0
E: SUBSYSTEM=block
E: TAGS=:systemd:
E: USEC_INITIALIZED=149161867794
%
% udevadm info --name=/dev/nbd0p1 --query=all
P: /devices/virtual/block/nbd0/nbd0p1
N: nbd0p1
E: DEVNAME=/dev/nbd0p1
E: DEVPATH=/devices/virtual/block/nbd0/nbd0p1
E: DEVTYPE=partition
E: MAJOR=43
E: MINOR=1
E: SUBSYSTEM=block
E: SYSTEMD_READY=0
E: TAGS=:systemd:
E: USEC_INITIALIZED=1614479761
%

> It has to be disabled in lvm.conf. If you only stopped it, it is a socket
> activated service and will be restarted (at least on recent Fedora and
> RHEL.)
>

Yes, I only stopped the process. Thanks for point this.

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2014-10-31 14:50 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-10-31  1:17 [linux-lvm] vgscan can't see LVM volumes on QEMU image Roman Mashak
2014-10-31  9:36 ` Zdenek Kabelac
2014-10-31  9:48   ` Zdenek Kabelac
2014-10-31 13:00     ` Roman Mashak
2014-10-31 14:13       ` Marian Csontos
2014-10-31 14:50         ` Roman Mashak
2014-10-31 14:18       ` Peter Rajnoha
2014-10-31 14:49         ` Roman Mashak

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