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Old 04-08-2013, 07:41 PM   #1
screwzm
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Does qemu/kvm support ovf?


The latest ovf standard does point out that many hypervisor support ovf, however without mentioning qemu/kvm. And I can not find any related topic in qemu website. So could any one answer me whether qemu/kvm support ovf or not? If it support, hot to boot a ovf package use qemu/kvm?
Thanks in advance for your helpful insights.
 
Old 04-09-2013, 12:31 PM   #2
dyasny
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there is no such thing as an ovf standard. ovf is an xml file with VM definitions, which every vendor formats any way they like, with absolutely no standards.

qemu-kvm is a hypervisor and it can run a VM, it has nothing to do with the VM definitions in an ovf, or any other format, because parsing VM definitions and feeding them to the hypervisor is the job of a management layer, not the hypervisor.
 
Old 04-09-2013, 07:56 PM   #3
screwzm
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Quote:
Originally Posted by dyasny View Post
there is no such thing as an ovf standard. ovf is an xml file with VM definitions, which every vendor formats any way they like, with absolutely no standards.

qemu-kvm is a hypervisor and it can run a VM, it has nothing to do with the VM definitions in an ovf, or any other format, because parsing VM definitions and feeding them to the hypervisor is the job of a management layer, not the hypervisor.
ovf is indeed a standard, go http://www.dmtf.org/sites/default/fi...0243_2.0.0.pdf to have a look.
I agree with you that "eeding them to the hypervisor is the job of a management layer, not the hypervisor". However, according some doc, some hypervisor have integrated this piece of management work, such as vmware. vmware can directly boot a ovf package. My question is whether kvm/qemu able to boot ovf package directly too? No idea.
Thanks.
 
Old 04-10-2013, 03:44 PM   #4
dyasny
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Quote:
Originally Posted by screwzm View Post
ovf is indeed a standard, go http://www.dmtf.org/sites/default/fi...0243_2.0.0.pdf to have a look.
technically it is, but if you actually read it - it's so hazy everyone abuses it

Quote:
I agree with you that "eeding them to the hypervisor is the job of a management layer, not the hypervisor". However, according some doc, some hypervisor have integrated this piece of management work, such as vmware.
Not quite. The vmware hypervisor is only a small part of ESXi, it's an embedded hypervisor if you like, but it's also an OS with management additions, since vmware can only ship the entire package as a whole, it is perceived as a whole, but it is a sum of different parts. KVM is the hypervisor, but the OS is Linux, and the management layer is usually libvirt.

Quote:
vmware can directly boot a ovf package.
if that ovf is specifically formatted to be booted by vmware.

Quote:
My question is whether kvm/qemu able to boot ovf package directly too? No idea.
a vmware ovf? probably not, but you can probably unpack the ovf into the guest definitions and the guest disk images, reformat both of them into something appropriate for libvirt/kvm and start the guest up. A more serious v2v process will also involve guest driver conversions.
 
  


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