libvirt users - Mar 2021 - Issue

Is there any additional info anyone who needs?

________________________________
From: Samuel Thampy <samjiks at hotmail.com>
Sent: 03 March 2021 22:11
To: libvirt-users at redhat.com <libvirt-users at redhat.com>
Subject: Issue

I have a storage backend san disks, I have five servers which is KVM hosted
guests.

I am looking to clone an image of a guest machine, so I can use a new VM form
the image on a different server..

I am not sure what the best way. But when I do that, I get a memory error, and
need to xfs_repair and damages the original machine.


My steps are

One vm machine on the same server

  *   dd create original vm to template.img
  *   lvcreate -L 9G -n <vol-name> <pool>
  *   dd template.img to /dev/<pool>/<vol-name>
  *   virsh define <vm_name>.xml

another vm machine on the secondary server

  *   copy template.img to another server
  *   lvcreate -L 9G -n <vol-name> <pool>
  *   dd if=template.img  of=/dev/<pool>/<vol-name>
  *   virsh define <vm_name>.xml

May I know the steps are missing something because both are getting corrupted.
Thanks for your help.

Regards
Samuel Thampy


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On 3/5/21 11:04 AM, Samuel Thampy wrote:
> Is there any additional info anyone who needs?
> 
> ------------------------------------------------------------------------
> *From:* Samuel Thampy <samjiks at hotmail.com>
> *Sent:* 03 March 2021 22:11
> *To:* libvirt-users at redhat.com <libvirt-users at redhat.com>
> *Subject:* Issue
> I have a storage backend san disks, I have five servers which is KVM 
> hosted guests.
> 
> I am looking to clone an image of a guest machine, so I can use a new VM 
> form the image on a different server..
> 
> I am not sure what the best way. But when I do that, I get a memory 
> error, and need to xfs_repair and damages the original machine.
> 
> 
> My steps are
> 
> One vm machine on the same server
> 
>   * dd create original vm to template.img
>   * lvcreate -L 9G -n <vol-name> <pool>
>   * dd template.img to /dev/<pool>/<vol-name>
>   * virsh define <vm_name>.xml
> 
> another vm machine on the secondary server
> 
>   * copy template.img to another server
>   * lvcreate -L 9G -n <vol-name> <pool>
>   * dd if=template.img? of=/dev/<pool>/<vol-name>
>   * virsh define <vm_name>.xml
> 
Nothing suspicious about these steps. So I'm suspecting that either 
template.img is corrupt, or it does not fit into LV, or maybe it's in 
use? I mean, if template.img is an image that's in use by a running 
domain it doesn't necessarily contain valid state.

Michal