code: func NewControlPlaneJoinPhase() workflow.Phase {
  	return workflow.Phase{
  		Name:    "control-plane-join",
  		Short:   "Join a machine as a control plane instance",
  		Example: controlPlaneJoinExample,
  		Phases: []workflow.Phase{
  			{
  				Name:           "all",
  				Short:          "Join a machine as a control plane instance",
  				InheritFlags:   getControlPlaneJoinPhaseFlags("all"),
  				RunAllSiblings: true,
  			},
  			newEtcdLocalSubphase(),
  			newUpdateStatusSubphase(),
  			newMarkControlPlaneSubphase(),
  		},
  	}
  }
docs: // NewControlPlaneJoinPhase creates a kubeadm workflow phase that implements joining a machine as a control plane instance