I'm using Kubevirt to manage my virtual machine instances. When I using Kubevirt to create a vm(with two GPUs), kubevirt will generate a libvirt guest domain xml for this vm which includes two GPUs, the domain xml as follow :
<hostdev mode='subsystem' type='pci' managed='no'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x83' slot='0x00' function='0x0'/>
</source>
<alias name='ua-gpu-gpu0'/>
<address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='no'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x84' slot='0x00' function='0x0'/>
</source>
<alias name='ua-gpu-gpu1'/>
<address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
</hostdev>
No one ever edit this domain xml, but these two hostdev element disappeared in the domain xml. During this time, I've run the gpu_burn command to do a stress test for these two GPUs.
My question is :
- when will libvirtd change the guest domain xml ?
- why libvirtd delete these two
hostdevfrom domain xml ?
