[CentOS-virt] How do I reduce a disk size of a particular VM?

Poh Yong Hwang

yongsan at gmail.com
Tue Sep 21 04:37:15 UTC 2010


Hi,

Thanks. Yes I am also using gnome and using VNC to access it. But I could
not find a simple way to connect the guest's CD to the ISO file. The option
under boot option is only either harddisk, CD or PXE. So how can I connect
the guest CD to the ISO file?

Thanks!

YongSan

On Mon, Sep 20, 2010 at 7:18 PM, compdoc <compdoc at hotrodpc.com> wrote:

> Place the gparted iso file somewhere you can access it from the VM. I would
> recommend placing it on the Centos server that hosts the VM. I keep all my
> ISO files in a folder named ISOs.
>
>
>
> I run the gnome desktop on my servers, so I use VNC to remote control the
> server. I would run the virt-manager gui to shut down the VM guest, connect
> the guest’s CD to the iso file, and change the boot options to boot from the
> CD. Of course, you can do all this from the command line, and I’m sure you
> can google information of how to do it that way.
>
>
>
> With gparted, I think you can backup the VM over the network to a share.
> So, I would first backup the VM, then resize the VM disk with gparted and
> make sure it boots, then backup the VM again, create a new smaller disk for
> the guest, and restore the smaller backup image.
>
>
>
>
>
>
>
>
>
> *From:* centos-virt-bounces at centos.org [mailto:
> centos-virt-bounces at centos.org] *On Behalf Of *Poh Yong Hwang
> *Sent:* Monday, September 20, 2010 1:25 AM
> *To:* Discussion about the virtualization on CentOS
> *Subject:* Re: [CentOS-virt] How do I reduce a disk size of a particular
> VM?
>
>
>
> Hi,
>
>
>
> I am trying to boot that particular VM which I want to resize using gparted
> ISO. May I know how can I boot a VM using a ISO file?
>
>
>
> Thanks!
>
>
>
> YongSan
>
> >
> > On Fri, Aug 27, 2010 at 5:30 PM, Victor Padro <vpadro at gmail.com> wrote:
> >>
> >> On Fri, Aug 27, 2010 at 4:10 AM, Poh Yong Hwang <yongsan at gmail.com>
> wrote:
> >> > Hi,
> >> > But I would like the diskspace to be release to the hardware node so
> >> > that i
> >> > can create another VM as my hardware node is running out of diskspace.
> I
> >> > presume that using Gpart only reduce the diskspace on the VM but it
> will
> >> > not
> >> > be release to the hardware node?
> >> > Thanks!
> >> > YongSan
> >> >
> >> > On Fri, Aug 27, 2010 at 4:58 PM, Victor Padro <vpadro at gmail.com>
> wrote:
> >> >>
> >> >> On Fri, Aug 27, 2010 at 3:51 AM, Poh Yong Hwang <yongsan at gmail.com>
> >> >> wrote:
> >> >> > Hi,
> >> >> > As per subject, is there a way to reduce diskspace for a VM. I have
> a
> >> >> > VM
> >> >> > with 200GB but would like to reduce the diskspace to 100GB.
> >> >> > Please advise.
> >> >> > Thanks!
> >> >> > Yongsan
> >> >> > _______________________________________________
> >> >> > CentOS-virt mailing list
> >> >> > CentOS-virt at centos.org
> >> >> > http://lists.centos.org/mailman/listinfo/centos-virt
> >> >> >
> >> >> >
> >> >>
> >> >> Perhaps shriking the partition using gparted inside the VM?
> >> >>
> >> >> Otherwise I can't figure out how to shrink a raw, qcow file under KVM
> >> >> for example...
> >> >>
> >> >>
> >> >> --
> >> >> Linux User #452368
> >> >> http://twitter.com/vpadro
> >> >>
> >> >> "Everything that irritates us about others can lead us to an
> >> >> understanding of ourselves"
> >> >> _______________________________________________
> >> >> CentOS-virt mailing list
> >> >> CentOS-virt at centos.org
> >> >> http://lists.centos.org/mailman/listinfo/centos-virt
> >> >
> >> >
> >> > _______________________________________________
> >> > CentOS-virt mailing list
> >> > CentOS-virt at centos.org
> >> > http://lists.centos.org/mailman/listinfo/centos-virt
> >> >
> >> >
> >>
> >> What are you using to virtualize those VMs?
> >>
> >> --
> >> Linux User #452368
> >> http://twitter.com/vpadro
> >>
> >> "Everything that irritates us about others can lead us to an
> >> understanding of ourselves"
> >> _______________________________________________
> >> CentOS-virt mailing list
> >> CentOS-virt at centos.org
> >> http://lists.centos.org/mailman/listinfo/centos-virt
> >
> >
> > _______________________________________________
> > CentOS-virt mailing list
> > CentOS-virt at centos.org
> > http://lists.centos.org/mailman/listinfo/centos-virt
> >
> >
>
> I can only think of creating a smaller qcow file, clonning using dd
> the contents of the oversized qcow/raw HD to that newly qcow
> file...although is not the best solution.
>
> Maybe someone else could bring a better solution because there's no
> much info on KVM just a little under Xen... :(
>
>
>
> --
>
> Linux User #452368
> http://twitter.com/vpadro
>
> "Everything that irritates us about others can lead us to an
> understanding of ourselves"
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> http://lists.centos.org/mailman/listinfo/centos-virt
>
>
>
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> http://lists.centos.org/mailman/listinfo/centos-virt
>
>
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