Download the kubelet configuration from a ConfigMap of the form “kubelet-config-1.X” in the cluster, where X is the minor version of the kubelet. kubeadm uses the KuberneteVersion field in the kubeadm-config ConfigMap to determine what the desired kubelet version is, but the user can override this by using the –kubelet-version parameter.
kubeadm upgrade node phase kubelet-config [flags]
|Do not change any state, just output the actions that would be performed.|
|help for kubelet-config|
|--kubeconfig string Default: "/etc/kubernetes/admin.conf"|
|The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.|
|The *desired* version for the kubelet config after the upgrade. If not specified, the KubernetesVersion from the kubeadm-config ConfigMap will be used|
|[EXPERIMENTAL] The path to the 'real' host root filesystem.|
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