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On Tue, Nov 27, 2012 at 7:19 PM, Matt Joyce <matt.joyce at cloudscaling.com>wrote:

> other hazard to mention.
>
> live fs resizes tend to be sketchy.  the growing of a live filesystem is
> possible and tends to work.  but shrinking for obvious reasons is very
> dangerous and can be wrought with peril.  also cannot be done live as far
> as I know for any ext filesystem.
>
> -matt
>
> On Tue, Nov 27, 2012 at 6:13 PM, Lei Zhang <zhang.lei.fly at gmail.com>wrote:
>
>>  Got it.
>>
>> Could Cinder can check the created volume? I can not find any command
>> like cinder update. I try to extends the volume by lvextend, but data in
>> the cinder db doesn't update. So when I delete the changed volume, it raise
>> error.
>>
>> On Tue, Nov 27, 2012 at 12:34 PM, Dean Troyer <dtroyer at gmail.com> wrote:
>>
>> On Mon, Nov 26, 2012 at 8:04 PM, Lei Zhang <zhang.lei.fly at gmail.com>
>>> wrote:
>>> > Another question. If the vm treat the vol-0 as a normal block device,
>>> is it
>>> > necessary to partition? If not, the fdisk will show Disk /dev/vdb
>>> doesn't
>>> > contain a valid partition table. If yes, how can I extend the volume
>>> on the
>>> > vm? It seems that treat the volume as a normal block device is not a
>>> good
>>> > idea.
>>>
>>> It is not necessary to partition the device (vdb) inside com-0.  If
>>> you use it as an LVM physical device (PV) inside com-0 then pvresize
>>> will update the metadata o recognize the new size inside com-0 after
>>> you lvextend the vol-0 in the host.
>>>
>>> If you do partition /dev/vdb and don't use LVM in com-0 it is still
>>> possible to grow a partition, but you'll have to delete and re-create
>>> the last partition to get com-0 to recognize the additional space.
>>> And you'd also need to do the filesystem resize too.
>>>
>>> Nested LVM can be tricky but if you are careful to keep the layers
>>> separated it can work.
>>>
>>> dt
>>>
>>> --
>>>
>>> Dean Troyer
>>> dtroyer at gmail.com
>>>
>> --
>> Lei Zhang
>>
>> Blog: http://jeffrey4l.github.com
>> twitter/weibo: @jeffrey4l
>>
>>
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>
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There is no functionality to re-size a Cinder Volume.

John
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