Migrating a KVM guest to different architecture CPU
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@jaredbusch said in Migrating a KVM guest to different architecture CPU:
Yeah, thanks. I did not expect any issues, but have not done it previously.
The only difference between how I did it, and how it looks like you are doing it... is that I haven't used the same XML.
I set it up again from scratch, only re-using the virtual disk.
There may be a setting in your XML pointing to your old CPU config, but I don't know... just a guess.
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@tim_g There is. I'll post that in a moment.
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The
qcow2is transferring at a good clip.
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@jaredbusch said in Migrating a KVM guest to different architecture CPU:
@tim_g There is. I'll post that in a moment.
Export of plex.xml form the original box has this.
<cpu mode='custom' match='exact' check='partial'> <model fallback='allow'>Nehalem</model> </cpu>Export of a test Fedora 26 system on th enew box has this.
<cpu mode='custom' match='exact' check='full'> <model fallback='forbid'>SandyBridge</model> <feature policy='require' name='vme'/> <feature policy='require' name='hypervisor'/> <feature policy='require' name='arat'/> <feature policy='require' name='xsaveopt'/> </cpu>So it is different. But I am going to try it. Tomorrow morning once the copy of the
qcow2is finished.I will have to edit the XML to point to the new location of the disk.
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Imported the XML with only the network and disk lines edited appropriately, and it booted right up.
As awesome as expected.
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@jaredbusch said in Migrating a KVM guest to different architecture CPU:
Imported the XML with only the network and disk lines edited appropriately, and it booted right up.
As awesome as expected.
That’s the one thing I missed about hyper-v 2012 having the ability to edit xml files.
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@black3dynamite said in Migrating a KVM guest to different architecture CPU:
@jaredbusch said in Migrating a KVM guest to different architecture CPU:
Imported the XML with only the network and disk lines edited appropriately, and it booted right up.
As awesome as expected.
That’s the one thing I missed about hyper-v 2012 having the ability to edit xml files.
I have manually migrated VMs with Hyper-V using the export and import method, which would match what I did here from a technical standpoint.
But as I used the Hyper-V Manager GUI to do everything, I never even looked to edit a file directly. In that case, the disks was imported from where it was saved instead of being copied directly. I did have to edit the VM settings on the new instance to attach the correct network.
The Hyper-V export process does create files and I assume one can edit them as I did here.
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@jaredbusch said in Migrating a KVM guest to different architecture CPU:
@black3dynamite said in Migrating a KVM guest to different architecture CPU:
@jaredbusch said in Migrating a KVM guest to different architecture CPU:
Imported the XML with only the network and disk lines edited appropriately, and it booted right up.
As awesome as expected.
That’s the one thing I missed about hyper-v 2012 having the ability to edit xml files.
I have manually migrated VMs with Hyper-V using the export and import method, which would match what I did here from a technical standpoint.
But as I used the Hyper-V Manager GUI to do everything, I never even looked to edit a file directly. In that case, the disks was imported from where it was saved instead of being copied directly. I did have to edit the VM settings on the new instance to attach the correct network.
The Hyper-V export process does create files and I assume one can edit them as I did here.
As of HyperV 2016, you can no longer edit the files directly. Not xml anymore.
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I forget their reason for doing so, but i remember it made sense.
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@tim_g said in Migrating a KVM guest to different architecture CPU:
I forget their reason for doing so, but i remember it made sense.
Corrupted config files was one of the reason.
