Re: [Xen-users] How to manipulate xen image size

[Alexander Piavlo <piavka@xxxxxxxxxxxx>]

You could use nfsclone  http://www.linux-ntfs.org/doku.php?id=ntfsclone and
with losetup and kpartx help you can clone nfspartitions from dom0, and 
it works faster than with dd.
Ido Levy wrote:
> Hello All,
>
> We would appreciate your advice on the following issue.
>
> We have created a full virtualized Xen guest that its disk is an image file
> of 4GB.
> We want to use this image file as a template for creating Xen guests which
> their disk will be an LVM device.
> The disk image file is of type:
>
>       file /var/lib/xen/images/rhel52.img
>             /var/lib/xen/images/rhel52.img: x86 boot sector; partition 1:
> ID=0x83, active, starthead 1, startsector 63, 9221247 sectors;
>       partition 2: ID=0x83, starthead 0, startsector 9221310, 19438650
> sectors, code offset 0x48
>
>
> By dd/cat this image file to an empty LVM device
>
>        cat /var/lib/xen/images/rhel52.img > /dev/VolGroup00/rhel52
>
> and by using this configuration file
>
>       name = "rhel52"
>       uuid = "b8ba7d42-191c-3ab9-5f78-40d1c1f1ab67"
>       maxmem = 2048
>       memory = 2048
>       vcpus = 1
>       builder = "hvm"
>       kernel = "/usr/lib/xen/boot/hvmloader"
>       boot = "c"
>       pae = 1
>       acpi = 1
>       apic = 1
>       localtime = 0
>       on_poweroff = "destroy"
>       on_reboot = "restart"
>       on_crash = "restart"
>       device_model = "/usr/lib/xen/bin/qemu-dm"
>       sdl = 0
>       vnc = 1
>       vncunused = 1
>       keymap = "en-us"
>       disk = [ "phy:/dev/VolGroup00/rhel52,hda,w" ]
>       vif = [ "mac=00:16:3e:36:b5:50,bridge=xenbr0" ]
>       serial = "pty"
>
> we can boot the machine and everything is working properly.
>
> We want to be able to provide the flexibility to enlarge partition number 1
> size to the size of the LVM device.
> Please note that we are not aware of the LVM device size in advance, that's
> why we need this flexibility.
>
> For example our LVM size is 20GB and our image file is just 4GB.
>
> How can we adjust the partition size ( 4GB in our case ) to the LVM size
> ( 20GB in our case ) ?
>
> If there is a better way to accomplish this task we would also be happy to
> know.
>
> Thanks,
>
> Ido & Alexandra
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>   
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