[PVE-User] Shrink qemu raw image...

Mon Jun 22 15:24:59 CEST 2015

I am deploying a new VM with LVM partition and try again the procedure with
Parted Live iso...
I cannot work right now with the raw image that I need apply the procedure,
because is in production and has 4 TB size...
I am wait to convert it with qemu-img convert....
This take a lot of time... Amost 2 or 3 days :(

2015-06-22 10:18 GMT-03:00 Gilberto Nunes <gilberto.nunes32 at gmail.com>:

> >> What about:
> >>
> >> vgs
> >> sfdisk -l <your disk path>
>
> This result in a empty partition table...
> It sounds like I lost all partitions inside the guest
>
> 2015-06-22 10:14 GMT-03:00 Eneko Lacunza <elacunza at binovo.es>:
>
>>
>> What about:
>>
>> vgs
>> sfdisk -l <your disk path>
>>
>> El 22/06/15 a las 15:05, Gilberto Nunes escribió:
>>
>>   Ok guys...
>>
>>  All those steps I already perform...
>>  I can shrink fs+partition+lvm inside the guest... Everything is ok!
>>  But, when I perform this:
>>
>>  qemu-img resize vm.raw -3100G
>>
>>  the guest crash!
>>
>>  The raw image, on Proxmox fs has 3,9 TB...
>>  Inside the guest, I have this:
>>
>> df -h
>> Filesystem            Size  Used Avail Use% Mounted on
>> /dev/mapper/vg_bancosiscobra-lv_root
>>                        50G  4,7G   43G  11% /
>> tmpfs                 939M     0  939M   0% /dev/shm
>> /dev/sda2             485M   67M  393M  15% /boot
>> /dev/mapper/vg_bancosiscobra-lv_home
>>                       640G  540G   68G  89% /home
>>
>>  With the qemu-img resize command showing above, I managed to shrink raw
>> image to 800GB, more than sufficient to boot the machine...
>>  But no way! I get error inside the guest...
>>
>>  My next shot will be this tutorial:
>>
>> http://dnaeon.github.io/resizing-a-kvm-disk-image-on-lvm-the-easy-way/
>>
>> 2015-06-22 9:57 GMT-03:00 Yannis Milios <yannis.milios at gmail.com>:
>>
>>> First try to shrink fs+partition+lvm inside guest vm with gparted as
>>> Lindsay suggested.
>>>
>>> Reboot the VM to check if resize completed successfully.
>>> Check actual fs+partition+lvm sizes inside VM and verify their total
>>> size.
>>>
>>> Shutdown VM and try to resize raw disk so that the total size is bigger
>>> at least some MB than the actual size.
>>>
>>> For example if actual size is 1Tb resize it to 1.2-1.3 Tb just to be
>>> safe.
>>>
>>> Try booting the VM again.
>>>   On 22 Jun 2015 13:37, "Gilberto Nunes" <gilberto.nunes32 at gmail.com>
>>> wrote:
>>>
>>>>   So, inside the VM I managed to reduce the LVM and the Filesystem...
>>>>  But, when I try to use qemu-img resize, perhaps I mistake something,
>>>> because the crash down in kernel panic, 'cause not found and partitions,
>>>> even the LVM!
>>>>
>>>>  Are you sure that gparted live iso is safe???
>>>>
>>>>  Thanks
>>>>
>>>> 2015-06-22 9:25 GMT-03:00 Lindsay Mathieson <
>>>> lindsay.mathieson at gmail.com>:
>>>>
>>>>>  Use the GPartEd Live ISO (http://gparted.org/download.php) to resize
>>>>> the LVM *and* the partiton, then qemu-img to shrink it.
>>>>>
>>>>>
>>>>>
>>>>>  On 22 June 2015 at 21:50, Gilberto Nunes <gilberto.nunes32 at gmail.com>
>>>>> wrote:
>>>>>
>>>>>>      Hi guys
>>>>>>
>>>>>>  I was able to reduce LVM and root/home partition inside a certain
>>>>>> VM, runnning on Proxmox.
>>>>>>  The VM has raw image.
>>>>>>  This image was 4 TB of size..
>>>>>>  But, when I try using command:
>>>>>>
>>>>>> qemu-img resize vm.raw -XXXXG
>>>>>>
>>>>>>  The VM get crash! No partition remain....
>>>>>>
>>>>>>  So I thought use virt-resize to make this operation....
>>>>>>  I can use perhaps, other host, with virt-manager and other virt
>>>>>> tools installed, shrink the raw image with virt-resize and get use the
>>>>>> resulting image to new VM on Proxmox...
>>>>>>
>>>>>>  Or, maybe you guys, has another solution...??
>>>>>>
>>>>>>  Thanks
>>>>>>
>>>>>> --
>>>>>>
>>>>>>  Gilberto Ferreira
>>>>>> +55 (47) 9676-7530 <%2B55%20%2847%29%209676-7530>
>>>>>> Skype: gilberto.nunes36
>>>>>>
>>>>>>
>>>>>>  _______________________________________________
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>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Lindsay
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>>
>>>>  Gilberto Ferreira
>>>> +55 (47) 9676-7530 <%2B55%20%2847%29%209676-7530>
>>>> Skype: gilberto.nunes36
>>>>
>>>>
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>>>>
>>
>>
>> --
>>
>>  Gilberto Ferreira
>> +55 (47) 9676-7530
>> Skype: gilberto.nunes36
>>
>>
>>
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>>
>>
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>> Binovo IT Human Project, S.L.
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>
>
> --
>
> Gilberto Ferreira
> +55 (47) 9676-7530
> Skype: gilberto.nunes36
>
>

-- 

Gilberto Ferreira
+55 (47) 9676-7530
Skype: gilberto.nunes36
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