[libvirt-users] Virsh Failing to Snapshot VMWare VM with Multiple Disks
I am trying to use virsh's snapshot-create command on a VMWare vm that has multiple disks in its device list, but the command is failing with the error: "Could not create snapshot: FileNotFound - file [pool] filename.vmx". However, this command works if my vm only has one disk in its device list. I am using libvirt 0.9.10, and the storage pool is nfs mounted between the machine that I am running virsh on and the hypervisor. Can anyone tell me what I am doing wrong or if this is even supported by virsh? Thanks.
On 07/18/2012 09:47 AM, Elizabeth Griffith wrote:
I am trying to use virsh's snapshot-create command on a VMWare vm that has multiple disks in its device list, but the command is failing with the error: "Could not create snapshot: FileNotFound - file [pool] filename.vmx". However, this command works if my vm only has one disk in its device list. I am using libvirt 0.9.10, and the storage pool is nfs mounted between the machine that I am running virsh on and the hypervisor. Can anyone tell me what I am doing wrong or if this is even supported by virsh?
virsh supports calling the underlying API; and the underlying API works for multi-disk VMs in qemu, so that should not be your issue. The real question is whether the vmware driver in libvirt has been properly wired up to obey that API on a multi-disk VM. Unfortunately, I don't know the answer to that, as I don't use vmware myself, but you are welcome to try and debug and submit a patch if no one else more familiar with the vmware driver in libvirt steps in. -- Eric Blake eblake@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
2012/7/18 Eric Blake <eblake@redhat.com>:
On 07/18/2012 09:47 AM, Elizabeth Griffith wrote:
I am trying to use virsh's snapshot-create command on a VMWare vm that has multiple disks in its device list, but the command is failing with the error: "Could not create snapshot: FileNotFound - file [pool] filename.vmx". However, this command works if my vm only has one disk in its device list. I am using libvirt 0.9.10, and the storage pool is nfs mounted between the machine that I am running virsh on and the hypervisor. Can anyone tell me what I am doing wrong or if this is even supported by virsh?
virsh supports calling the underlying API; and the underlying API works for multi-disk VMs in qemu, so that should not be your issue. The real question is whether the vmware driver in libvirt has been properly wired up to obey that API on a multi-disk VM. Unfortunately, I don't know the answer to that, as I don't use vmware myself, but you are welcome to try and debug and submit a patch if no one else more familiar with the vmware driver in libvirt steps in.
The error about the VMX files is strange. I'll have a look on this issue. Actually, snapshots of multi-volume VMs should just work. -- Matthias Bolte http://photron.blogspot.com
2012/7/18 Matthias Bolte <matthias.bolte@googlemail.com>:
2012/7/18 Eric Blake <eblake@redhat.com>:
On 07/18/2012 09:47 AM, Elizabeth Griffith wrote:
I am trying to use virsh's snapshot-create command on a VMWare vm that has multiple disks in its device list, but the command is failing with the error: "Could not create snapshot: FileNotFound - file [pool] filename.vmx". However, this command works if my vm only has one disk in its device list. I am using libvirt 0.9.10, and the storage pool is nfs mounted between the machine that I am running virsh on and the hypervisor. Can anyone tell me what I am doing wrong or if this is even supported by virsh?
virsh supports calling the underlying API; and the underlying API works for multi-disk VMs in qemu, so that should not be your issue. The real question is whether the vmware driver in libvirt has been properly wired up to obey that API on a multi-disk VM. Unfortunately, I don't know the answer to that, as I don't use vmware myself, but you are welcome to try and debug and submit a patch if no one else more familiar with the vmware driver in libvirt steps in.
The error about the VMX files is strange. I'll have a look on this issue. Actually, snapshots of multi-volume VMs should just work.
Okay, I did a quick test with an ESX VM that has two normal file-based VMDK disks attached and snapshot-create works as expected. I suspect there is some other problem/difference with your VM that triggers this error. Does the VM work normally? It can be started etc.? "Could not create snapshot: FileNotFound - file [pool] filename.vmx" looks like you replaced the original filenames in there. Does the referenced file actually exist, or is it really missing? -- Matthias Bolte http://photron.blogspot.com
The referenced vmx file is really there. If I remove all but one of the disks, then the snapshot-create works. I am trying to run it on a vm that is just defined not fully started, but I believe that is the correct way to snapshot a vm anyway. Thanks for your help. ________________________________ From: Matthias Bolte <matthias.bolte@googlemail.com> To: Eric Blake <eblake@redhat.com> Cc: Elizabeth Griffith <e_beth_82@yahoo.com>; "libvirt-users@redhat.com" <libvirt-users@redhat.com> Sent: Wednesday, July 18, 2012 4:40 PM Subject: Re: [libvirt-users] Virsh Failing to Snapshot VMWare VM with Multiple Disks 2012/7/18 Matthias Bolte <matthias.bolte@googlemail.com>:
2012/7/18 Eric Blake <eblake@redhat.com>:
On 07/18/2012 09:47 AM, Elizabeth Griffith wrote:
I am trying to use virsh's snapshot-create command on a VMWare vm that has multiple disks in its device list, but the command is failing with the error: "Could not create snapshot: FileNotFound - file [pool] filename.vmx". However, this command works if my vm only has one disk in its device list. I am using libvirt 0.9.10, and the storage pool is nfs mounted between the machine that I am running virsh on and the hypervisor. Can anyone tell me what I am doing wrong or if this is even supported by virsh?
virsh supports calling the underlying API; and the underlying API works for multi-disk VMs in qemu, so that should not be your issue. The real question is whether the vmware driver in libvirt has been properly wired up to obey that API on a multi-disk VM. Unfortunately, I don't know the answer to that, as I don't use vmware myself, but you are welcome to try and debug and submit a patch if no one else more familiar with the vmware driver in libvirt steps in.
The error about the VMX files is strange. I'll have a look on this issue. Actually, snapshots of multi-volume VMs should just work.
Okay, I did a quick test with an ESX VM that has two normal file-based VMDK disks attached and snapshot-create works as expected. I suspect there is some other problem/difference with your VM that triggers this error. Does the VM work normally? It can be started etc.? "Could not create snapshot: FileNotFound - file [pool] filename.vmx" looks like you replaced the original filenames in there. Does the referenced file actually exist, or is it really missing? -- Matthias Bolte http://photron.blogspot.com
participants (3)
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Elizabeth Griffith -
Eric Blake -
Matthias Bolte