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Ido Levy

2008-Sep-24 09:08 UTC

[Xen-users] How to manipulate xen image size

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@lists.xensource.com
http://lists.xensource.com/xen-users

Shanmuga Rajan

2008-Sep-24 09:25 UTC

head link

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

i suggest you to clone the current disk(4GB) in to bigger size
disk(20GB)....
try to boot it in new cloned disk 20GB. if its ok then destroy your old
disk(4GB)...

On Wed, Sep 24, 2008 at 2:38 PM, Ido Levy <IDOL@il.ibm.com> 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@lists.xensource.com
> http://lists.xensource.com/xen-users
>


-- 

Regards

Shan,
Development Engineer,
Binary Karma.


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Alexander Piavlo

2008-Sep-24 10:55 UTC

head link

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

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@lists.xensource.com
> http://lists.xensource.com/xen-users
>   

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Nathan Eisenberg

2008-Sep-24 14:13 UTC

head link

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

Forgive me if I misunderstood the question, but wouldn''t this simply be
a matter of expanding the virtual PV in the DomU?

Thank you,
Nathan Eisenberg
Sr. Systems Administrator
Atlas Networks, LLC


-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Ido Levy
Sent: Wednesday, September 24, 2008 2:09 AM
To: xen-users@lists.xensource.com
Cc: Alexandra Kisin
Subject: [Xen-users] How to manipulate xen image size


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@lists.xensource.com
http://lists.xensource.com/xen-users




_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

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