KubeRay Pod Pool Virtual Kubelet is an optional and standalone component of the KubeRay Ecosystem. It provides warmed-up pod pools by registering itself as a virtual kubelet to a Kubernetes cluster. When KubeRay requests pods from the virtual kubelet, the actual pods are taken from one of the pod pools specified by the users and effectively skip:

• resource scheduling time
• image pulling time
• volume preparation time because those pods are already active and waiting in pools.

pod pool controller

watch pod which scheduled by kubernetes, pick and sync pod status from pod pool to kubernetes