[linux-lvm] how to enlarge a logical volume that is a virtual disk of a virtual machine that uses lvm too?

[linux-lvm] how to enlarge a logical volume that is a virtual disk of a virtual machine that uses lvm too?

[Ricardo Funke Ormieres]

[-- Attachment #1: Type: text/plain, Size: 406 bytes --]

Hello,

I have a phisical machine with a xen vm installed and I'm using LVM in both.
The Virtual Machine is using a LogVol (that belongs to the Dom0) as it's
virtual hard disk.

It's possible to enlarge this LogVol in order to enlarge the vm's hard disk?

I know that I can just create another LogVol in the Dom0 and add it to the
vm's PV, but I'm curious for that possible alternative.

Thanks in advance

[-- Attachment #2: Type: text/html, Size: 461 bytes --]

Re: [linux-lvm] how to enlarge a logical volume that is a virtual disk of a virtual machine that uses lvm too?

[Alex Brett]

I'm not sure if you could do it online or not (I can't see any reason
why not, but there may be issues), but you should just be able to resize
the LV (lvresize) in dom0 (obviously make sure you enlarge it, not
shrink it), then do a pvresize in the VM to enlarge the PV to use all
the extra space.

Alex

Ricardo Funke Ormieres wrote:
> Hello,
> 
> I have a phisical machine with a xen vm installed and I'm using LVM in
> both. The Virtual Machine is using a LogVol (that belongs to the Dom0)
> as it's virtual hard disk.
> 
> It's possible to enlarge this LogVol in order to enlarge the vm's hard disk?
> 
> I know that I can just create another LogVol in the Dom0 and add it to
> the vm's PV, but I'm curious for that possible alternative.
> 
> Thanks in advance
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] how to enlarge a logical volume that is a virtual disk of a virtual machine that uses lvm too?

[Ricardo Funke Ormieres]

[-- Attachment #1: Type: text/plain, Size: 1448 bytes --]

Ok Alex, I'll try it online and offline to see what happen

Thank you very much! =)

2009/3/7 Alex Brett <alex@alexbrett.net>

> I'm not sure if you could do it online or not (I can't see any reason
> why not, but there may be issues), but you should just be able to resize
> the LV (lvresize) in dom0 (obviously make sure you enlarge it, not
> shrink it), then do a pvresize in the VM to enlarge the PV to use all
> the extra space.
>
> Alex
>
> Ricardo Funke Ormieres wrote:
> > Hello,
> >
> > I have a phisical machine with a xen vm installed and I'm using LVM in
> > both. The Virtual Machine is using a LogVol (that belongs to the Dom0)
> > as it's virtual hard disk.
> >
> > It's possible to enlarge this LogVol in order to enlarge the vm's hard
> disk?
> >
> > I know that I can just create another LogVol in the Dom0 and add it to
> > the vm's PV, but I'm curious for that possible alternative.
> >
> > Thanks in advance
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm@redhat.com
> > https://www.redhat.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>

[-- Attachment #2: Type: text/html, Size: 2295 bytes --]

Re: [linux-lvm] how to enlarge a logical volume that is a virtual disk of a virtual machine that uses lvm too?

[Bryn M. Reeves]

Alex Brett wrote:
> I'm not sure if you could do it online or not (I can't see any
> reason why not, but there may be issues), but you should just be
> able to resize the LV (lvresize) in dom0 (obviously make sure you
> enlarge it, not shrink it), then do a pvresize in the VM to enlarge
> the PV to use all

Depending on the type of device and whether it is partitioned or not
it may not be possible to have the guest recognise the new size of the
device without a reboot.

Regards,
Bryn.