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Kubevirt

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In details, KubeVirt technology addresses the needs of development teams that have adopted or want to adopt Kubernetes but possess existing Virtual Machine-based workloads that cannot be easily containerized. So KubeVirt extends Kubernetes by adding additional virtualization resource types (especially the VM/VMI type) through Kubernetes's Custom Resource Definitions API. By using this mechanism, the Kubernetes API can be used to manage these VM resources alongside all other resources Kubernetes provides. The resources themselves in Kubernetes are not enough to launch virtual machines. For this to happen, the functionality and business logic needs to be added to the cluster. Scheduling, networking, and storage are all delegated to Kubernetes, while KubeVirt provides the virtualization functionality. The functionality is not added to Kubernetes itself, but rather added to a Kubernetes cluster by running additional controllers and agents on an existing cluster. And these necessary controllers and agents are all provided by KubeVirt.

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Intel QuickAssist Technology is developed by Intel and runs on the Intel Architecture to provide security and compression acceleration capabilities to improve performance and efficiency. It will offload the workloads like cryptography and compression from the CPU to handwarehardware. Server, networking, big data, and storage applications use Intel QuickAssist to offload compute-intensive operations, such as:

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Fundamentally, Kubevirt create a Kubernetes CRD to hold some resource configurations that fit a libvrit instance. So actually to assign a QAT vf into a VM is to create a libvirt and insert the specific device into hostdev block. (In libvirt, hostdev label means a plain host device assignment with all its limitations)

So when a QAT vf resource is required, I call the Kubevirt method to get the device id of the assigned QAT and integrate it into libvirt domain.

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