CODEWITHSUNDEEP
virtualizationuuidqemukvmlibvirt
crossto
crossto

Reputation: 53

Expose duplicate UUID to kvm guest

I'd like to run several VMs/domains at once that expose the same SMBIOS system UUID to the guest. I need to test several versions of software that uses SMBIOS UUID value to generate unique ID. For some reason libvirt demands that domain's top-level UUID is the same as UUID exposed to VM via SMBIOS. (as per libvirt domain xml format documentation)

If this entry is provided alongside a top-level uuid element, then the two values must match.

Therefore I cannot run two identical domains (from guest's perspective) in single libvirt instance.

Is there a way around this limitation?

Upvotes: 1

Views: 1724

Answers (1)

DanielB
DanielB

Reputation: 2816

There is no way around this. Having matching UUIDs visible from host and guest is one of the guarantees that libvirt provides to applications, allowing things like system monitoring agents to correlate guests OS with host OS they are running on.

Upvotes: 1

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