DryRunStaticPodUpgrade fakes an upgrade of the control plane.

EnforceVersionPolicies makes sure that the version the user specified is valid to upgrade to There are both fatal and skippable (with --force) errors.

GetPathManagerForUpgrade returns a path manager properly configured for the given InitConfiguration.

InteractivelyConfirmUpgrade asks the user whether they _really_ want to upgrade.

NewCmdApply returns the cobra command for `kubeadm upgrade apply`.

NewCmdDiff returns the cobra command for `kubeadm upgrade diff`.

NewCmdNode returns the cobra command for `kubeadm upgrade node`.

NewCmdPlan returns the cobra command for `kubeadm upgrade plan`.

NewCmdUpgrade returns the cobra command for `kubeadm upgrade`.

NewCmdUpgradeControlPlane returns the cobra.Command for upgrading the controlplane instance on this node.

NewCmdUpgradeNodeConfig returns the cobra.Command for downloading the new/upgrading the kubelet configuration from the kubelet-config-1.X ConfigMap in the cluster.

PerformControlPlaneUpgrade actually performs the upgrade procedure for the cluster of your type (self-hosted or static-pod-hosted).

PerformStaticPodUpgrade performs the upgrade of the control plane components for a static pod hosted cluster.

RunApply takes care of the actual upgrade functionality It does the following things: - Checks if the cluster is healthy - Gets the configuration from the kubeadm-config ConfigMap in the cluster - Enforces all version skew policies - Asks the user if they really want to upgrade - Makes sure the control plane images are available locally on the master(s) - Upgrades the control plane components - Applies the other resources that'd be created with kubeadm init as well, like - Creating the RBAC rules for the bootstrap tokens and the cluster-info ConfigMap - Applying new kube-dns and kube-proxy manifests - Uploads the newly used configuration to the cluster ConfigMap.

RunPlan takes care of outputting available versions to upgrade to for the user.

RunUpgradeControlPlane is executed when `kubeadm upgrade node controlplane` runs.

RunUpgradeNodeConfig is executed when `kubeadm upgrade node config` runs.

SetImplicitFlags handles dynamically defaulting flags based on each other's value.