Network interface hotplug for Kubernetes

" summary

Explains a design and implementation for dynamically adding/removing L2 network interfaces to running Kubernetes pods and KubeVirt virtual machines by modifying Multus and KubeVirt. Covers background on KubeVirt, CNI and Multus, the chosen approach to implement hotplug at the pod layer (so pods and VMs benefit), and the community coordination done with Multus and KubeVirt to deliver the feature.

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