code: func NewCheckEtcdPhase() workflow.Phase {
  	return workflow.Phase{
  		Name:   "check-etcd",
  		Run:    runCheckEtcdPhase,
  		Hidden: true,
  	}
  }
docs: // NewCheckEtcdPhase is a hidden phase that runs after the control-plane-prepare and
  // before the bootstrap-kubelet phase that ensures etcd is healthy