}

	return nil
}

// renewCertsByComponent takes charge of renewing certificates used by a specific component before
// the static pod of the component is upgraded
func renewCertsByComponent(cfg *kubeadmapi.InitConfiguration, component string, certsRenewMgr *renewal.Manager) error {
	var certificates []string

			// Renew everything
			rm, err := renewal.NewManager(&cfg.ClusterConfiguration, tmpDir)
			if err != nil {
				t.Fatalf("Failed to create the certificate renewal manager: %v", err)
			}

			err = renewCertsByComponent(cfg, test.component, rm)
			if test.shouldErrorOnRenew {
				if err == nil {
					t.Fatal("expected renewal error, got nothing")
				}
				// expected error, got error
				return
			}