[CentOS] Live CD boot for KVM guest. How?

Thu Oct 20 08:24:01 UTC 2011
Müfit Eribol <hme at onart.com.tr>

On 19.10.2011 23:12, Theo Band wrote:
> On 10/19/2011 08:15 PM, John R Pierce wrote:
>> On 10/19/11 9:34 AM, Müfit Eribol wrote:
>>> My host and guest are CentOS 6. The guest is going to be a web server in
>>> production. I am trying to resize (extend) of the base partition of my
>>> guest.  But I can of course start the installation of CentOS 6 guest all
>>> over again with a larger image size. However, just for the sake of
>>> better understanding I an trying to solve things not to be end up in a
>>> dead end after some years.
>> rather than resizing the system 'drive', I woudl have simply created
>> ANOTHER logical drive mapped to the guest, and create a new file system
>> on it, moving the stuff thats filling up your base disk (/home ?
>> /var/www ?) to it, then remounting it as the 'new' /home or /var/www or
>> whatever....
> Agree.
> But if your system disk is now bigger, you can also create a new
> partition (even while the system is live) and use this new partition.
> And I would still use LVM for this new partition. This does not really
> add much complexity. It does add a lot of flexibility. The steps are:
> parted /dev/sda
> mkpart p ext2<start>  <stop>
> pvcreate /dev/sda2 (your new second new partition?)
> vgcreate vg /dev/sda2
> lvcreate vg -n test -L 10G
> mkfs.ext4 /dev/vg/test
> The volume group does not need to be assigned completely and leaves some
> room to carve new partitions in the future. Also the snapshot feature
> allows to create consistent backups if needed.
> I even think you can used parted to change you system partition. Simply
> delete the partition and recreate with the exact same starting sector.
> One mistake and you will loose a lot though, so why would you even try?
> Theo
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
Thank you for your support.

I perfectly understand that LVM is the way to go.