Check which versions are available to upgrade to and validate whether your current cluster is upgradeable. To skip the internet check, pass in the optional [version] parameter
kubeadm upgrade plan [version] [flags]
|Show unstable versions of Kubernetes as an upgrade alternative and allow upgrading to an alpha/beta/release candidate versions of Kubernetes.|
|Show release candidate versions of Kubernetes as an upgrade alternative and allow upgrading to a release candidate versions of Kubernetes.|
|Path to a kubeadm configuration file.|
|A set of key=value pairs that describe feature gates for various features. Options are:|
IPv6DualStack=true|false (ALPHA - default=false)
|help for plan|
|A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.|
|--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.|
|Specifies whether the configuration file that will be used in the upgrade should be printed or not.|
|[EXPERIMENTAL] The path to the 'real' host root filesystem.|
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