Is run prior to the kubelet starting up, writes a file /etc/kubernetes/kubelet.env
which is expected to be an environment file used by kubelet.
It run with two modes one with the kubeconfig passed which queries the api server to get the version then adds that to the file as KUBELET_IMAGE_TAG
.
The other needs to be passed with a flag imagever
which sets the image version to the file with the same tag.