client.PrependReactor("get", "configmaps", func(action ktesting.Action) (bool, runtime.Object, error) {
		return true, &v1.ConfigMap{}, errors.NewNotFound(v1.Resource("configmaps"), configMapName)
	})
	client.PrependReactor("create", "configmaps", func(action ktesting.Action) (bool, runtime.Object, error) {
		return true, &v1.ConfigMap{}, errors.NewAlreadyExists(v1.Resource("configmaps"), configMapName)
	})
}

				client.PrependReactor("create", "configmaps", func(clientgotesting.Action) (bool, runtime.Object, error) {
					return true, nil, apierrors.NewAlreadyExists(schema.GroupResource{}, "name")
				})
				client.PrependReactor("get", "configmaps", func(clientgotesting.Action) (bool, runtime.Object, error) {
					return true, &v1.ConfigMap{}, nil
				})
			},
			mutator:       func(*v1.ConfigMap) error { return errors.New("") },

	ctx := context.Background()
	configMap, err := client.CoreV1().ConfigMaps(meta.Namespace).Get(ctx, meta.Name, metav1.GetOptions{})
	if err != nil {
		return errors.Wrap(err, "unable to get ConfigMap")
	}
	if err = mutator(configMap); err != nil {
		return errors.Wrap(err, "unable to mutate ConfigMap")
	}
	_, err = client.CoreV1().ConfigMaps(configMap.ObjectMeta.Namespace).Update(ctx, configMap, metav1.UpdateOptions{})

	_, err := configMapClient.ConfigMaps(required.Namespace).Update(context.TODO(), required, metav1.UpdateOptions{})
	if apierrors.IsNotFound(err) {
		_, err := configMapClient.ConfigMaps(required.Namespace).Create(context.TODO(), required, metav1.CreateOptions{})
		return err
	}

		pod.Spec.Volumes = append(pod.Spec.Volumes, corev1.Volume{VolumeSource: corev1.VolumeSource{
			ConfigMap: &corev1.ConfigMapVolumeSource{LocalObjectReference: corev1.LocalObjectReference{Name: fmt.Sprintf("configmap%d-%s", i, pod.Name)}},
		}})
	}
	// Choose shared configmaps randomly from shared configmaps in a namespace.
	subset = randomSubset(opts.sharedConfigMapsPerPod, opts.sharedConfigMapsPerNamespace)

				}, metav1.CreateOptions{})
				client.Kube().CoreV1().ConfigMaps("bar").Create(context.Background(), &v1.ConfigMap{
					ObjectMeta: metav1.ObjectMeta{Namespace: "bar", Name: "istio-ca-root-cert"},
					Data:       map[string]string{"root-cert.pem": string(fakeCACert)},
				}, metav1.CreateOptions{})
				client.Kube().CoreV1().ConfigMaps("istio-system").Create(context.Background(), &v1.ConfigMap{

	}
	meshConfigMap, err := client.Kube().CoreV1().ConfigMaps(ctx.IstioNamespace()).Get(context.TODO(), injectConfigMapName, metav1.GetOptions{})
	if err != nil {
		return "", fmt.Errorf("could not find valid configmap %q from namespace  %q: %v - "+
			"Use --valuesFile or re-run kube-inject with `-i <istioSystemNamespace> and ensure istio-sidecar-injector configmap exists",
			injectConfigMapName, ctx.IstioNamespace(), err)
	}

		staticPods      []testresources.FakeStaticPod
		configMaps      []testresources.FakeConfigMap
		newControlPlane bool
		expectedError   bool
	}{
		{
			name:          "invalid - No kubeadm-config ConfigMap",
			expectedError: true,
		},
		{
			name: "invalid - No ClusterConfiguration in kubeadm-config ConfigMap",
			configMaps: []testresources.FakeConfigMap{
				{

	var errs []error

	// If the coredns ConfigMap is missing, show a warning and assume that the
	// DNS addon was skipped during "kubeadm init", and that its redeployment on upgrade is not desired.
	//
	// TODO: remove this once "kubeadm upgrade apply" phases are supported:
	//   https://github.com/kubernetes/kubeadm/issues/1318
	var missingCoreDNSConfigMap bool
	if _, err := client.CoreV1().ConfigMaps(metav1.NamespaceSystem).Get(

	}
	return cmName, nil
}

func (cm *configMap) getConfigMap(c cluster.Cluster, name string) (*corev1.ConfigMap, error) {
	return c.Kube().CoreV1().ConfigMaps(cm.namespace).Get(context.TODO(), name, metav1.GetOptions{})
}

func (cm *configMap) updateConfigMap(c cluster.Cluster, cfgMap *corev1.ConfigMap) error {
	_, err := c.Kube().CoreV1().ConfigMaps(cm.namespace).Update(context.TODO(), cfgMap, metav1.UpdateOptions{})