func IsVolumeSnapshotHasVSCDeleteSecret(vs *snapshotv1beta1api.VolumeSnapshot) bool {
	_, nameExists := vs.Annotations[CSIDeleteSnapshotSecretName]
	_, nsExists := vs.Annotations[CSIDeleteSnapshotSecretNamespace]
	return nameExists && nsExists
}
IsVolumeSnapshotHasVSCDeleteSecret returns whether a volumesnapshot should set the deletesnapshot secret
for the static volumesnapshotcontent that is created on restore
package util
import (
	"context"
	"fmt"
	"strings"
	"time"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	snapshotv1beta1api "github.com/kubernetes-csi/external-snapshotter/client/v4/apis/volumesnapshot/v1beta1"
	snapshotterClientSet "github.com/kubernetes-csi/external-snapshotter/client/v4/clientset/versioned"
	snapshotter "github.com/kubernetes-csi/external-snapshotter/client/v4/clientset/versioned/typed/volumesnapshot/v1beta1"
	corev1api "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/wait"
	"k8s.io/client-go/kubernetes"
	corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
	"k8s.io/client-go/tools/clientcmd"
	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
	"github.com/vmware-tanzu/velero/pkg/label"
	"github.com/vmware-tanzu/velero/pkg/restic"
)
const (
	resticPodAnnotation = "backup.velero.io/backup-volumes"
)
func GetPVForPVC(pvc *corev1api.PersistentVolumeClaim, corev1 corev1client.PersistentVolumesGetter) (*corev1api.PersistentVolume, error) {
	if pvc.Spec.VolumeName == "" {
		return nil, errors.Errorf("PVC %s/%s has no volume backing this claim", pvc.Namespace, pvc.Name)
	}
	if pvc.Status.Phase != corev1api.ClaimBound {
		return nil, errors.Errorf("PVC %s/%s is in phase %v and is not bound to a volume", pvc.Namespace, pvc.Name, pvc.Status.Phase)
	}
	pvName := pvc.Spec.VolumeName
	pv, err := corev1.PersistentVolumes().Get(context.TODO(), pvName, metav1.GetOptions{})
	if err != nil {
		return nil, errors.Wrapf(err, "failed to get PV %s for PVC %s/%s", pvName, pvc.Namespace, pvc.Name)
	}
	return pv, nil
}
func GetPodsUsingPVC(pvcNamespace, pvcName string, corev1 corev1client.PodsGetter) ([]corev1api.Pod, error) {
	podsUsingPVC := []corev1api.Pod{}
	podList, err := corev1.Pods(pvcNamespace).List(context.TODO(), metav1.ListOptions{})
	if err != nil {
		return nil, err
	}
	for _, p := range podList.Items {
		for _, v := range p.Spec.Volumes {
			if v.PersistentVolumeClaim != nil && v.PersistentVolumeClaim.ClaimName == pvcName {
				podsUsingPVC = append(podsUsingPVC, p)
			}
		}
	}
	return podsUsingPVC, nil
}
func GetPodVolumeNameForPVC(pod corev1api.Pod, pvcName string) (string, error) {
	for _, v := range pod.Spec.Volumes {
		if v.PersistentVolumeClaim != nil && v.PersistentVolumeClaim.ClaimName == pvcName {
			return v.Name, nil
		}
	}
	return "", errors.Errorf("Pod %s/%s does not use PVC %s/%s", pod.Namespace, pod.Name, pod.Namespace, pvcName)
}
func Contains(slice []string, key string) bool {
	for _, i := range slice {
		if i == key {
			return true
		}
	}
	return false
}
func IsPVCBackedUpByRestic(pvcNamespace, pvcName string, podClient corev1client.PodsGetter, defaultVolumesToRestic bool) (bool, error) {
	pods, err := GetPodsUsingPVC(pvcNamespace, pvcName, podClient)
	if err != nil {
		return false, errors.WithStack(err)
	}
	for _, p := range pods {
		resticVols := restic.GetPodVolumesUsingRestic(&p, defaultVolumesToRestic)
		if len(resticVols) > 0 {
			volName, err := GetPodVolumeNameForPVC(p, pvcName)
			if err != nil {
				return false, err
			}
			if Contains(resticVols, volName) {
				return true, nil
			}
		}
	}
	return false, nil
}
func GetVolumeSnapshotClassForStorageClass(provisioner string, snapshotClient snapshotter.SnapshotV1beta1Interface) (*snapshotv1beta1api.VolumeSnapshotClass, error) {
	snapshotClasses, err := snapshotClient.VolumeSnapshotClasses().List(context.TODO(), metav1.ListOptions{})
	if err != nil {
		return nil, errors.Wrap(err, "error listing volumesnapshot classes")
	}
	for _, sc := range snapshotClasses.Items {
		_, hasLabelSelector := sc.Labels[VolumeSnapshotClassSelectorLabel]
		if sc.Driver == provisioner && hasLabelSelector {
			return &sc, nil
		}
	}
	return nil, errors.Errorf("failed to get volumesnapshotclass for provisioner %s, ensure that the desired volumesnapshot class has the %s label", provisioner, VolumeSnapshotClassSelectorLabel)
}
func GetVolumeSnapshotContentForVolumeSnapshot(volSnap *snapshotv1beta1api.VolumeSnapshot, snapshotClient snapshotter.SnapshotV1beta1Interface, log logrus.FieldLogger, shouldWait bool) (*snapshotv1beta1api.VolumeSnapshotContent, error) {
	if !shouldWait {
		if volSnap.Status == nil || volSnap.Status.BoundVolumeSnapshotContentName == nil {
			return nil, nil
		}
		vsc, err := snapshotClient.VolumeSnapshotContents().Get(context.TODO(), *volSnap.Status.BoundVolumeSnapshotContentName, metav1.GetOptions{})
		if err != nil {
			return nil, errors.Wrap(err, "error getting volume snapshot content from API")
		}
		return vsc, nil
	}
	timeout := 10 * time.Minute
	interval := 5 * time.Second
	var snapshotContent *snapshotv1beta1api.VolumeSnapshotContent
	err := wait.PollImmediate(interval, timeout, func() (bool, error) {
		vs, err := snapshotClient.VolumeSnapshots(volSnap.Namespace).Get(context.TODO(), volSnap.Name, metav1.GetOptions{})
		if err != nil {
			return false, errors.Wrapf(err, fmt.Sprintf("failed to get volumesnapshot %s/%s", volSnap.Namespace, volSnap.Name))
		}
		if vs.Status == nil || vs.Status.BoundVolumeSnapshotContentName == nil {
			log.Infof("Waiting for CSI driver to reconcile volumesnapshot %s/%s. Retrying in %ds", volSnap.Namespace, volSnap.Name, interval/time.Second)
			return false, nil
		}
		snapshotContent, err = snapshotClient.VolumeSnapshotContents().Get(context.TODO(), *vs.Status.BoundVolumeSnapshotContentName, metav1.GetOptions{})
		if err != nil {
			return false, errors.Wrapf(err, fmt.Sprintf("failed to get volumesnapshotcontent %s for volumesnapshot %s/%s", *vs.Status.BoundVolumeSnapshotContentName, vs.Namespace, vs.Name))
		}
		if snapshotContent.Status == nil || snapshotContent.Status.SnapshotHandle == nil {
			log.Infof("Waiting for volumesnapshotcontents %s to have snapshot handle. Retrying in %ds", snapshotContent.Name, interval/time.Second)
			return false, nil
		}
		return true, nil
	})
	if err != nil {
		if err == wait.ErrWaitTimeout {
			log.Errorf("Timed out awaiting reconciliation of volumesnapshot %s/%s", volSnap.Namespace, volSnap.Name)
		}
		return nil, err
	}
	return snapshotContent, nil
}
func GetClients() (*kubernetes.Clientset, *snapshotterClientSet.Clientset, error) {
	loadingRules := clientcmd.NewDefaultClientConfigLoadingRules()
	configOverrides := &clientcmd.ConfigOverrides{}
	kubeConfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, configOverrides)
	clientConfig, err := kubeConfig.ClientConfig()
	if err != nil {
		return nil, nil, errors.WithStack(err)
	}
	client, err := kubernetes.NewForConfig(clientConfig)
	if err != nil {
		return nil, nil, errors.WithStack(err)
	}
	snapshotterClient, err := snapshotterClientSet.NewForConfig(clientConfig)
	if err != nil {
		return nil, nil, errors.WithStack(err)
	}
	return client, snapshotterClient, nil
}
func IsVolumeSnapshotClassHasListerSecret(vc *snapshotv1beta1api.VolumeSnapshotClass) bool {
	_, nameExists := vc.Annotations[PrefixedSnapshotterListSecretNameKey]
	_, nsExists := vc.Annotations[PrefixedSnapshotterListSecretNamespaceKey]
	return nameExists && nsExists
}
func IsVolumeSnapshotContentHasDeleteSecret(vsc *snapshotv1beta1api.VolumeSnapshotContent) bool {
	_, nameExists := vsc.Annotations[PrefixedSnapshotterSecretNameKey]
	_, nsExists := vsc.Annotations[PrefixedSnapshotterSecretNamespaceKey]
	return nameExists && nsExists
}