[ovirt-users] direct lun resizing

[Jiří Sléžka]

Hi,

it worked!

for reference...

on host where vm is running...

multipath -r

shows old size so I rescan both paths...

echo 1 > /sys/class/scsi_device/2\:0\:1\:62/device/rescan
echo 1 > /sys/class/scsi_device/2\:0\:0\:62/device/rescan

then...

multipath -r

...shows new size

now I get lun_id (part of --path) and vm_id (--domain) from api and...

virsh -c qemu:///system blockresize --path
/dev/mapper/36005076b07500eff541809600000001c --size 629145600 --domain
7a5de3e0-ecbd-4ed6-bf98-2e7a45e96027

btw. size is in KiB, so in my case 600GiB * 1024 * 1024

I had to set sasl passwd for my user... I hope this doesn't break
something...

saslpasswd2 -a libvirt my_username

after this resize the colegue tell me that direct lun was resized on the
vm side...

[524704.451468] sd 2:0:0:1: Capacity data has changed
[525449.969906] sd 2:0:0:1: Capacity data has changed
[525449.971771] sd 2:0:0:1: [sdb] 1258291200 512-byte logical blocks:
(644 GB/600 GiB)
[525449.972697] sdb: detected capacity change from 536870912000 to
644245094400

I have no idea what could happen if I set wrong size :-)


Thanks, Jiri


On 10/19/2017 04:34 PM, Jiří Sléžka wrote:
> Hi,
> 
> thanks a lot! I am going to try sugested workaround but tommorow :-)
> 
> Cheers, Jiri
> 
> 
> On 10/19/2017 02:25 PM, Fred Rolland wrote:
>> Hi,
>>
>> Offline refresh of a direct lun's size is supported since oVirt 3.4 [1].
>> Online refresh, however, is not yet supported [2].
>> You can try the workaround posted on [2], comment 7.
>>
>> [1] *Bug 1026868* <https://bugzilla.redhat.com/show_bug.cgi?id=1026868>
>> -Direct LUN is not being updated after resizing
>> [2] *Bug 1155275* <https://bugzilla.redhat.com/show_bug.cgi?id=1155275>
>> -[RFE] Online update Direct LUN size to the Guest after LUN resize
>>
>> On Thu, Oct 19, 2017 at 1:30 PM, Jiří Sléžka <jiri.slezka at slu.cz
>> <mailto:jiri.slezka at slu.cz>> wrote:
>>
>>     Hi all,
>>
>>     one of our user uses direct lun inside one of his vm. Now he expanded
>>     this lun on the disk array side from 500GB to 600GB but this change was
>>     not reflected on oVirt nor vm side.
>>
>>     How is direct lun resizing handled in oVirt?
>>
>>     Cheers,
>>
>>     Jiri
>>
>>
>>
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>>
>>
> 
> 
> 
> 
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