Re: [Xen-users] can I clone a runiung domU?

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Jett wrote:
> > Jett wrote:
> > > You can make use of the LVM snapshot.
> > >
> > > Ref:
> > > http://momotonic.com/2008/03/23/migrating-lvm-volumes-over-network-using-snapshots/ 
> > >
> > > Jett
> > >
> > > > Hi all
> > > >
> > > > I'd like to know if it's possible to clone a running domU. I need 
> > > > to make an exact copy of an existing CentOS xen domU, but without 
> > > > taking it offline. I'm using LVM, so I don't know if it will help.
> > > > I have tried doing it with dd, after shutting down the domU, but it 
> > > > takes ages. The LVM image is 30GB. I can't really afford to have 
> > > > the running one off line that long, so if possible I'd like todo it 
> > > > while it's running.
> > Hi Jett,
> >
> > I have though of LVM snapshots, but I need to move the LVM image to 
> > another server - will this be a problem if I make a snapshot of it?
> Hi,
>
> You may dd the snapshot and copy the image to other server. Use dd to 
> restore the partition after moving.
> The link I have gave you is exactly for migrating LVM volumes.
>
> Hope this help.
>
> Nice Day,
> Jett
Once I made a snapshot, should I be able to mount it, or not?

Cause it doesn't seem to work then?


lvcreate -L30G -s -n pluto_s /dev/data/hfserver2
Logical volume "pluto_s" created
[root@HF-LINSRV01 ~]# lvscan
ACTIVE            '/dev/data/cpanel002' [100.00 GB] inherit
ACTIVE            '/dev/data/windows2003_web' [30.00 GB] inherit
ACTIVE            '/dev/data/storage' [50.00 GB] inherit
ACTIVE   Original '/dev/data/hfserver2' [30.00 GB] inherit
ACTIVE            '/dev/data/windows2008' [30.00 GB] inherit
ACTIVE            '/dev/data/hfdns02' [30.00 GB] inherit
ACTIVE            '/dev/data/pluto' [30.00 GB] inherit
ACTIVE   Snapshot '/dev/data/pluto_s' [30.00 GB] inherit
ACTIVE            '/dev/system/root' [39.06 GB] inherit
ACTIVE            '/dev/system/swap' [9.75 GB] inherit
[root@HF-LINSRV01 ~]# mount /dev/data/pluto_s /mnt/pluto_s/
mount: you must specify the filesystem type

--

Kind Regards
Rudi Ahlers

Check out my technical blog, http://blog.softdux.com for Linux or other 
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