7 p.m.
Hi,
Managing disks in the ovirt gui seems completely error prone since the GUI ordering does
not seem to be used in any practical way. The scsi ID's are not exposed via the GUI
either, so if you have 2 drives of the same size on NFS there's no way to identify
which is which without resorting to dumping the xml.
I see in the xml that the target dev is correct and matches up with the GUI's drive
order, but the scsi unit seems to be generated based on the order of last activated:
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop' io='threads'/>
<source
file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/b622cde9-ffc4-487b-8038-f7cb7fbc00a1/7240b4b2-5ab1-40ab-99bb-09c69fd835f6'/>
<backingStore/>
<target dev='sda' bus='scsi'/>
<serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
<boot order='1'/>
<alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
<address type='drive' controller='0' bus='0'
target='0' unit='1'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop' io='threads'/>
<source
file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/86765f60-4240-44f4-b437-f22b2cc3df1a/482a363e-461a-4f37-876c-43ceb529a93a'/>
<backingStore/>
<target dev='sdb' bus='scsi'/>
<serial>86765f60-4240-44f4-b437-f22b2cc3df1a</serial>
<alias name='ua-86765f60-4240-44f4-b437-f22b2cc3df1a'/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop' io='threads'/>
<source
file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/0b020d24-3dea-4be7-931a-9c25ccfeec48/7e3957ff-a3bf-4080-a7b6-ddad7f63a299'/>
<backingStore/>
<target dev='sdc' bus='scsi'/>
<serial>0b020d24-3dea-4be7-931a-9c25ccfeec48</serial>
<alias name='scsi0-0-0-3'/>
<address type='drive' controller='0' bus='0'
target='0' unit='3'/>
</disk>
After deactivating the other 2 disks and rebooting the machine, sda has now become unit
3:
<target dev='sda' bus='scsi'/>
<serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
<boot order='1'/>
<alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
<address type='drive' controller='0' bus='0'
target='0' unit='3'/>
and then I shutdown, activated the extra 2 drives, booted it back up but now I'm still
on unit 3:
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop' io='threads'/>
<source
file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/b622cde9-ffc4-487b-8038-f7cb7fbc00a1/7240b4b2-5ab1-40ab-99bb-09c69fd835f6'/>
<backingStore/>
<target dev='sda' bus='scsi'/>
<serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
<boot order='1'/>
<alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
<address type='drive' controller='0' bus='0'
target='0' unit='3'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop' io='threads'/>
<source
file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/86765f60-4240-44f4-b437-f22b2cc3df1a/482a363e-461a-4f37-876c-43ceb529a93a'/>
<backingStore/>
<target dev='sdb' bus='scsi'/>
<serial>86765f60-4240-44f4-b437-f22b2cc3df1a</serial>
<alias name='ua-86765f60-4240-44f4-b437-f22b2cc3df1a'/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop' io='threads'/>
<source
file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/0b020d24-3dea-4be7-931a-9c25ccfeec48/7e3957ff-a3bf-4080-a7b6-ddad7f63a299'/>
<backingStore/>
<target dev='sdc' bus='scsi'/>
<serial>0b020d24-3dea-4be7-931a-9c25ccfeec48</serial>
<alias name='ua-0b020d24-3dea-4be7-931a-9c25ccfeec48'/>
<address type='drive' controller='0' bus='0'
target='0' unit='1'/>
</disk>
I managed to get things into the correct state by shutting down the VM, deactivating all
the disks, then activating them in the order I want them to show up. This sets the correct
order of unit 0 for sda, unit 1 for sdb, unit 2 for sdc.
Is there some way to make ovirt treat this in a sane way and always expose the scsi
devices in the same order as the GUI (and the "target dev" field)?
Cheers!
Nathan
4:21 p.m.
Hi Nathan,
Sounds like a UI problem. Can you post a screenshot just to make sure I'm
following?
Best wishes,
Greg
On Thu, Jul 19, 2018 at 8:02 PM Nathan March <nathan(a)shadow.sh> wrote:
Hi,
Managing disks in the ovirt gui seems completely error prone since the GUI
ordering does not seem to be used in any practical way. The scsi ID's are
not exposed via the GUI either, so if you have 2 drives of the same size on
NFS there's no way to identify which is which without resorting to dumping
the xml.
I see in the xml that the target dev is correct and matches up with the
GUI's drive order, but the scsi unit seems to be generated based on the
order of last activated:
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop'
io='threads'/>
<source file='/rhev/data-center/mnt/10.1.32.10:
_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/b622cde9-ffc4-487b-8038-f7cb7fbc00a1/7240b4b2-5ab1-40ab-99bb-09c69fd835f6'/>
<backingStore/>
<target dev='sda' bus='scsi'/>
<serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
<boot order='1'/>
<alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
<address type='drive' controller='0' bus='0'
target='0' unit='1'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop'
io='threads'/>
<source file='/rhev/data-center/mnt/10.1.32.10:
_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/86765f60-4240-44f4-b437-f22b2cc3df1a/482a363e-461a-4f37-876c-43ceb529a93a'/>
<backingStore/>
<target dev='sdb' bus='scsi'/>
<serial>86765f60-4240-44f4-b437-f22b2cc3df1a</serial>
<alias name='ua-86765f60-4240-44f4-b437-f22b2cc3df1a'/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop'
io='threads'/>
<source file='/rhev/data-center/mnt/10.1.32.10:
_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/0b020d24-3dea-4be7-931a-9c25ccfeec48/7e3957ff-a3bf-4080-a7b6-ddad7f63a299'/>
<backingStore/>
<target dev='sdc' bus='scsi'/>
<serial>0b020d24-3dea-4be7-931a-9c25ccfeec48</serial>
<alias name='scsi0-0-0-3'/>
<address type='drive' controller='0' bus='0'
target='0' unit='3'/>
</disk>
After deactivating the other 2 disks and rebooting the machine, sda has
now become unit 3:
<target dev='sda' bus='scsi'/>
<serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
<boot order='1'/>
<alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
<address type='drive' controller='0' bus='0'
target='0' unit='3'/>
and then I shutdown, activated the extra 2 drives, booted it back up but
now I'm still on unit 3:
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop'
io='threads'/>
<source file='/rhev/data-center/mnt/10.1.32.10:
_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/b622cde9-ffc4-487b-8038-f7cb7fbc00a1/7240b4b2-5ab1-40ab-99bb-09c69fd835f6'/>
<backingStore/>
<target dev='sda' bus='scsi'/>
<serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
<boot order='1'/>
<alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
<address type='drive' controller='0' bus='0'
target='0' unit='3'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop'
io='threads'/>
<source file='/rhev/data-center/mnt/10.1.32.10:
_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/86765f60-4240-44f4-b437-f22b2cc3df1a/482a363e-461a-4f37-876c-43ceb529a93a'/>
<backingStore/>
<target dev='sdb' bus='scsi'/>
<serial>86765f60-4240-44f4-b437-f22b2cc3df1a</serial>
<alias name='ua-86765f60-4240-44f4-b437-f22b2cc3df1a'/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
<disk type='file' device='disk' snapshot='no'>
<driver name='qemu' type='raw' cache='none'
error_policy='stop'
io='threads'/>
<source file='/rhev/data-center/mnt/10.1.32.10:
_sas01/2060a19f-f26c-4dba-a559-83541a4d0c7a/images/0b020d24-3dea-4be7-931a-9c25ccfeec48/7e3957ff-a3bf-4080-a7b6-ddad7f63a299'/>
<backingStore/>
<target dev='sdc' bus='scsi'/>
<serial>0b020d24-3dea-4be7-931a-9c25ccfeec48</serial>
<alias name='ua-0b020d24-3dea-4be7-931a-9c25ccfeec48'/>
<address type='drive' controller='0' bus='0'
target='0' unit='1'/>
</disk>
I managed to get things into the correct state by shutting down the VM,
deactivating all the disks, then activating them in the order I want them
to show up. This sets the correct order of unit 0 for sda, unit 1 for sdb,
unit 2 for sdc.
Is there some way to make ovirt treat this in a sane way and always expose
the scsi devices in the same order as the GUI (and the "target dev" field)?
Cheers!
Nathan
_______________________________________________
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To unsubscribe send an email to users-leave(a)ovirt.org
Privacy Statement: https://www.ovirt.org/site/privacy-policy/
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--
GREG SHEREMETA
SENIOR SOFTWARE ENGINEER - TEAM LEAD - RHV UX
Red Hat NA
<https://www.redhat.com/>
gshereme(a)redhat.com IRC: gshereme
<https://red.ht/sig>
5:46 p.m.
Hi Greg,
Thanks for the response, I've just written this all up with more detail
here - https://bugzilla.redhat.com/show_bug.cgi?id=1614064
Cheers,
Nathan
On Wed, Aug 8, 2018 at 2:21 PM, Greg Sheremeta <gshereme(a)redhat.com> wrote:
Hi Nathan,
Sounds like a UI problem. Can you post a screenshot just to make sure I'm
following?
Best wishes,
Greg
On Thu, Jul 19, 2018 at 8:02 PM Nathan March <nathan(a)shadow.sh> wrote:
> Hi,
>
> Managing disks in the ovirt gui seems completely error prone since the
> GUI ordering does not seem to be used in any practical way. The scsi ID's
> are not exposed via the GUI either, so if you have 2 drives of the same
> size on NFS there's no way to identify which is which without resorting to
> dumping the xml.
>
> I see in the xml that the target dev is correct and matches up with the
> GUI's drive order, but the scsi unit seems to be generated based on the
> order of last activated:
>
> <disk type='file' device='disk' snapshot='no'>
> <driver name='qemu' type='raw' cache='none'
error_policy='stop'
> io='threads'/>
> <source file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-
> f26c-4dba-a559-83541a4d0c7a/images/b622cde9-ffc4-487b-
> 8038-f7cb7fbc00a1/7240b4b2-5ab1-40ab-99bb-09c69fd835f6'/>
> <backingStore/>
> <target dev='sda' bus='scsi'/>
> <serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
> <boot order='1'/>
> <alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
> <address type='drive' controller='0' bus='0'
target='0' unit='1'/>
> </disk>
> <disk type='file' device='disk' snapshot='no'>
> <driver name='qemu' type='raw' cache='none'
error_policy='stop'
> io='threads'/>
> <source file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-
> f26c-4dba-a559-83541a4d0c7a/images/86765f60-4240-44f4-
> b437-f22b2cc3df1a/482a363e-461a-4f37-876c-43ceb529a93a'/>
> <backingStore/>
> <target dev='sdb' bus='scsi'/>
> <serial>86765f60-4240-44f4-b437-f22b2cc3df1a</serial>
> <alias name='ua-86765f60-4240-44f4-b437-f22b2cc3df1a'/>
> <address type='drive' controller='0' bus='0'
target='0' unit='0'/>
> </disk>
> <disk type='file' device='disk' snapshot='no'>
> <driver name='qemu' type='raw' cache='none'
error_policy='stop'
> io='threads'/>
> <source file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-
> f26c-4dba-a559-83541a4d0c7a/images/0b020d24-3dea-4be7-
> 931a-9c25ccfeec48/7e3957ff-a3bf-4080-a7b6-ddad7f63a299'/>
> <backingStore/>
> <target dev='sdc' bus='scsi'/>
> <serial>0b020d24-3dea-4be7-931a-9c25ccfeec48</serial>
> <alias name='scsi0-0-0-3'/>
> <address type='drive' controller='0' bus='0'
target='0' unit='3'/>
> </disk>
>
> After deactivating the other 2 disks and rebooting the machine, sda has
> now become unit 3:
>
> <target dev='sda' bus='scsi'/>
> <serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
> <boot order='1'/>
> <alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
> <address type='drive' controller='0' bus='0'
target='0' unit='3'/>
>
> and then I shutdown, activated the extra 2 drives, booted it back up but
> now I'm still on unit 3:
>
> <disk type='file' device='disk' snapshot='no'>
> <driver name='qemu' type='raw' cache='none'
error_policy='stop'
> io='threads'/>
> <source file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-
> f26c-4dba-a559-83541a4d0c7a/images/b622cde9-ffc4-487b-
> 8038-f7cb7fbc00a1/7240b4b2-5ab1-40ab-99bb-09c69fd835f6'/>
> <backingStore/>
> <target dev='sda' bus='scsi'/>
> <serial>b622cde9-ffc4-487b-8038-f7cb7fbc00a1</serial>
> <boot order='1'/>
> <alias name='ua-b622cde9-ffc4-487b-8038-f7cb7fbc00a1'/>
> <address type='drive' controller='0' bus='0'
target='0' unit='3'/>
> </disk>
> <disk type='file' device='disk' snapshot='no'>
> <driver name='qemu' type='raw' cache='none'
error_policy='stop'
> io='threads'/>
> <source file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-
> f26c-4dba-a559-83541a4d0c7a/images/86765f60-4240-44f4-
> b437-f22b2cc3df1a/482a363e-461a-4f37-876c-43ceb529a93a'/>
> <backingStore/>
> <target dev='sdb' bus='scsi'/>
> <serial>86765f60-4240-44f4-b437-f22b2cc3df1a</serial>
> <alias name='ua-86765f60-4240-44f4-b437-f22b2cc3df1a'/>
> <address type='drive' controller='0' bus='0'
target='0' unit='0'/>
> </disk>
> <disk type='file' device='disk' snapshot='no'>
> <driver name='qemu' type='raw' cache='none'
error_policy='stop'
> io='threads'/>
> <source file='/rhev/data-center/mnt/10.1.32.10:_sas01/2060a19f-
> f26c-4dba-a559-83541a4d0c7a/images/0b020d24-3dea-4be7-
> 931a-9c25ccfeec48/7e3957ff-a3bf-4080-a7b6-ddad7f63a299'/>
> <backingStore/>
> <target dev='sdc' bus='scsi'/>
> <serial>0b020d24-3dea-4be7-931a-9c25ccfeec48</serial>
> <alias name='ua-0b020d24-3dea-4be7-931a-9c25ccfeec48'/>
> <address type='drive' controller='0' bus='0'
target='0' unit='1'/>
> </disk>
>
> I managed to get things into the correct state by shutting down the VM,
> deactivating all the disks, then activating them in the order I want them
> to show up. This sets the correct order of unit 0 for sda, unit 1 for sdb,
> unit 2 for sdc.
>
> Is there some way to make ovirt treat this in a sane way and always
> expose the scsi devices in the same order as the GUI (and the "target dev"
> field)?
>
> Cheers!
>
> Nathan
> _______________________________________________
> Users mailing list -- users(a)ovirt.org
> To unsubscribe send an email to users-leave(a)ovirt.org
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
> oVirt Code of Conduct: https://www.ovirt.org/community/about/community-
> guidelines/
> List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/
> message/F7SQIFHHPR52NS6U52UY7LYUUMOQOSEQ/
>
--
GREG SHEREMETA
SENIOR SOFTWARE ENGINEER - TEAM LEAD - RHV UX
Red Hat NA
<https://www.redhat.com/>
gshereme(a)redhat.com IRC: gshereme
<https://red.ht/sig>
2454
days inactive
2473
days old
2 comments
2 participants
participants (2)
-
Greg Sheremeta -
Nathan March