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restore.go
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restore.go
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package backup
// Harvester VM backup & restore controllers helps to manage the VM backup & restore by leveraging
// the VolumeSnapshot functionality of Kubernetes CSI drivers with built-in storage driver longhorn.
// Currently, the following features are supported:
// 1. support VM live & offline backup to the supported backupTarget(i.e, nfs_v4 or s3 storage server).
// 2. restore a backup to a new VM or replacing it with the existing VM is supported.
import (
"context"
"fmt"
"reflect"
"strings"
"time"
snapshotv1 "github.com/kubernetes-csi/external-snapshotter/client/v4/apis/volumesnapshot/v1"
lhdatastore "github.com/longhorn/longhorn-manager/datastore"
lhv1beta2 "github.com/longhorn/longhorn-manager/k8s/pkg/apis/longhorn/v1beta2"
lhutil "github.com/longhorn/longhorn-manager/util"
ctlcorev1 "github.com/rancher/wrangler/v3/pkg/generated/controllers/core/v1"
"github.com/rancher/wrangler/v3/pkg/name"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
k8sschema "k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/record"
"k8s.io/utils/pointer"
kubevirtv1 "kubevirt.io/api/core/v1"
harvesterv1 "github.com/harvester/harvester/pkg/apis/harvesterhci.io/v1beta1"
"github.com/harvester/harvester/pkg/config"
"github.com/harvester/harvester/pkg/generated/clientset/versioned/scheme"
ctlharvesterv1 "github.com/harvester/harvester/pkg/generated/controllers/harvesterhci.io/v1beta1"
ctlkubevirtv1 "github.com/harvester/harvester/pkg/generated/controllers/kubevirt.io/v1"
ctllhv1 "github.com/harvester/harvester/pkg/generated/controllers/longhorn.io/v1beta2"
ctlsnapshotv1 "github.com/harvester/harvester/pkg/generated/controllers/snapshot.storage.k8s.io/v1"
"github.com/harvester/harvester/pkg/settings"
"github.com/harvester/harvester/pkg/util"
)
var (
restoreAnnotationsToDelete = []string{
"pv.kubernetes.io",
}
)
const (
restoreControllerName = "harvester-vm-restore-controller"
volumeSnapshotKindName = "VolumeSnapshot"
vmRestoreKindName = "VirtualMachineRestore"
restoreNameAnnotation = "restore.harvesterhci.io/name"
lastRestoreAnnotation = "restore.harvesterhci.io/last-restore-uid"
pvcNameSpaceAnnotation = "pvc.harvesterhci.io/namespace"
pvcNameAnnotation = "pvc.harvesterhci.io/name"
restoreErrorEvent = "VirtualMachineRestoreError"
restoreCompleteEvent = "VirtualMachineRestoreComplete"
restoreProgressBeforeVMStart = 90
restoreProgressComplete = 100
pvNamePrefix = "pvc"
//not truncate or remove dashes pv name
volumeNameUUIDNoTruncate = -1
)
type RestoreHandler struct {
context context.Context
restores ctlharvesterv1.VirtualMachineRestoreClient
restoreController ctlharvesterv1.VirtualMachineRestoreController
restoreCache ctlharvesterv1.VirtualMachineRestoreCache
backupCache ctlharvesterv1.VirtualMachineBackupCache
vms ctlkubevirtv1.VirtualMachineClient
vmCache ctlkubevirtv1.VirtualMachineCache
vmis ctlkubevirtv1.VirtualMachineInstanceClient
vmiCache ctlkubevirtv1.VirtualMachineInstanceCache
pvcClient ctlcorev1.PersistentVolumeClaimClient
pvcCache ctlcorev1.PersistentVolumeClaimCache
pvCache ctlcorev1.PersistentVolumeCache
secretClient ctlcorev1.SecretClient
secretCache ctlcorev1.SecretCache
snapshots ctlsnapshotv1.VolumeSnapshotClient
snapshotCache ctlsnapshotv1.VolumeSnapshotCache
snapshotContents ctlsnapshotv1.VolumeSnapshotContentClient
snapshotContentCache ctlsnapshotv1.VolumeSnapshotContentCache
lhbackupCache ctllhv1.BackupCache
volumeCache ctllhv1.VolumeCache
volumes ctllhv1.VolumeClient
lhengineCache ctllhv1.EngineCache
recorder record.EventRecorder
restClient *rest.RESTClient
}
func RegisterRestore(ctx context.Context, management *config.Management, _ config.Options) error {
restores := management.HarvesterFactory.Harvesterhci().V1beta1().VirtualMachineRestore()
backups := management.HarvesterFactory.Harvesterhci().V1beta1().VirtualMachineBackup()
vms := management.VirtFactory.Kubevirt().V1().VirtualMachine()
vmis := management.VirtFactory.Kubevirt().V1().VirtualMachineInstance()
pvcs := management.CoreFactory.Core().V1().PersistentVolumeClaim()
pvs := management.CoreFactory.Core().V1().PersistentVolume()
secrets := management.CoreFactory.Core().V1().Secret()
snapshots := management.SnapshotFactory.Snapshot().V1().VolumeSnapshot()
snapshotContents := management.SnapshotFactory.Snapshot().V1().VolumeSnapshotContent()
lhbackups := management.LonghornFactory.Longhorn().V1beta2().Backup()
volumes := management.LonghornFactory.Longhorn().V1beta2().Volume()
lhengines := management.LonghornFactory.Longhorn().V1beta2().Engine()
copyConfig := rest.CopyConfig(management.RestConfig)
copyConfig.GroupVersion = &k8sschema.GroupVersion{Group: kubevirtv1.SubresourceGroupName, Version: kubevirtv1.ApiLatestVersion}
copyConfig.APIPath = "/apis"
copyConfig.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
restClient, err := rest.RESTClientFor(copyConfig)
if err != nil {
return err
}
handler := &RestoreHandler{
context: ctx,
restores: restores,
restoreController: restores,
restoreCache: restores.Cache(),
backupCache: backups.Cache(),
vms: vms,
vmCache: vms.Cache(),
vmis: vmis,
vmiCache: vmis.Cache(),
pvcClient: pvcs,
pvcCache: pvcs.Cache(),
pvCache: pvs.Cache(),
secretClient: secrets,
secretCache: secrets.Cache(),
snapshots: snapshots,
snapshotCache: snapshots.Cache(),
snapshotContents: snapshotContents,
snapshotContentCache: snapshotContents.Cache(),
lhbackupCache: lhbackups.Cache(),
volumes: volumes,
volumeCache: volumes.Cache(),
lhengineCache: lhengines.Cache(),
recorder: management.NewRecorder(restoreControllerName, "", ""),
restClient: restClient,
}
restores.OnChange(ctx, restoreControllerName, handler.RestoreOnChanged)
restores.OnRemove(ctx, restoreControllerName, handler.RestoreOnRemove)
pvcs.OnChange(ctx, restoreControllerName, handler.PersistentVolumeClaimOnChange)
lhengines.OnChange(ctx, restoreControllerName, handler.LHEngineOnChange)
vms.OnChange(ctx, restoreControllerName, handler.VMOnChange)
return nil
}
// RestoreOnChanged handles vmRestore CRD object on change, it will help to create the new PVCs and either replace them
// with existing VM or used for the new VM.
func (h *RestoreHandler) RestoreOnChanged(_ string, restore *harvesterv1.VirtualMachineRestore) (*harvesterv1.VirtualMachineRestore, error) {
if restore == nil || restore.DeletionTimestamp != nil {
return nil, nil
}
if !isVMRestoreProgressing(restore) {
return nil, nil
}
if restore.Status == nil {
return nil, h.initStatus(restore)
}
backup, err := h.getVMBackup(restore)
if err != nil {
return nil, h.updateStatusError(restore, err, true)
}
if isVMRestoreMissingVolumes(restore) {
return nil, h.initVolumesStatus(restore, backup)
}
vm, isVolumesReady, err := h.reconcileResources(restore, backup)
if err != nil {
return nil, h.updateStatusError(restore, err, true)
}
// set vmRestore owner reference to the target VM
if len(restore.OwnerReferences) == 0 {
return nil, h.updateOwnerRefAndTargetUID(restore, vm)
}
return nil, h.updateStatus(restore, backup, vm, isVolumesReady)
}
// RestoreOnRemove delete VolumeSnapshotContent which is created by restore controller
// Since we would like to prevent LH Backups from being removed when users delete the VM,
// we use Retain policy in VolumeSnapshotContent.
// We need to delete VolumeSnapshotContent by restore controller, or there will have remaining VolumeSnapshotContent in the system.
func (h *RestoreHandler) RestoreOnRemove(_ string, restore *harvesterv1.VirtualMachineRestore) (*harvesterv1.VirtualMachineRestore, error) {
if restore == nil || restore.Status == nil {
return nil, nil
}
backup, err := h.getVMBackup(restore)
if err != nil {
if !apierrors.IsNotFound(err) {
return nil, err
}
return nil, nil
}
for _, volumeBackup := range backup.Status.VolumeBackups {
if volumeSnapshotContent, err := h.snapshotContentCache.Get(h.constructVolumeSnapshotContentName(restore.Namespace, restore.Name, *volumeBackup.Name)); err != nil {
if err != nil && !apierrors.IsNotFound(err) {
return nil, err
}
} else {
if err = h.snapshotContents.Delete(volumeSnapshotContent.Name, &metav1.DeleteOptions{}); err != nil {
return nil, err
}
}
}
return nil, nil
}
// pv naming convention from externel-provisioner
// porting from https://github.com/kubernetes-csi/external-provisioner/blob/90eae32d3a7352590500073b72b9a07f43adc881/pkg/controller/controller.go#L420-L436
func makeVolumeName(prefix, pvcUID string, volumeNameUUIDLength int) (string, error) {
// create persistent name based on a volumeNamePrefix and volumeNameUUIDLength
// of PVC's UID
if len(prefix) == 0 {
return "", fmt.Errorf("volume name prefix cannot be of length 0")
}
if len(pvcUID) == 0 {
return "", fmt.Errorf("corrupted PVC object, it is missing UID")
}
if volumeNameUUIDLength == -1 {
// Default behavior is to not truncate or remove dashes
return fmt.Sprintf("%s-%s", prefix, pvcUID), nil
}
// Else we remove all dashes from UUID and truncate to volumeNameUUIDLength
return fmt.Sprintf("%s-%s", prefix, strings.Replace(string(pvcUID), "-", "", -1)[0:volumeNameUUIDLength]), nil
}
func getVolumeName(pvc *corev1.PersistentVolumeClaim) (string, error) {
volumeName, err := makeVolumeName(pvNamePrefix, fmt.Sprintf("%s", pvc.ObjectMeta.UID), volumeNameUUIDNoTruncate)
if err != nil {
return "", err
}
//sync with LH's naming convention on volume
//https://github.com/longhorn/longhorn-manager/blob/88c792f7df38383634c2c8401f96d999385458c1/csi/controller_server.go#L83
volumeName = lhutil.AutoCorrectName(volumeName, lhdatastore.NameMaximumLength)
return volumeName, err
}
// PersistentVolumeClaimOnChange watching the PVCs on change and enqueue the vmRestore if it has the restore annotation
func (h *RestoreHandler) PersistentVolumeClaimOnChange(_ string, pvc *corev1.PersistentVolumeClaim) (*corev1.PersistentVolumeClaim, error) {
if pvc == nil || pvc.DeletionTimestamp != nil {
return nil, nil
}
restoreName, ok := pvc.Annotations[restoreNameAnnotation]
if !ok {
return nil, nil
}
volumeName, err := getVolumeName(pvc)
if err != nil {
return nil, err
}
volume, err := h.volumeCache.Get(util.LonghornSystemNamespaceName, volumeName)
if err != nil {
return nil, nil
}
volumeCopy := volume.DeepCopy()
if volumeCopy.Annotations == nil {
volumeCopy.Annotations = make(map[string]string)
}
volumeCopy.Annotations[pvcNameSpaceAnnotation] = pvc.Namespace
volumeCopy.Annotations[pvcNameAnnotation] = pvc.Name
volumeCopy.Annotations[restoreNameAnnotation] = restoreName
if !reflect.DeepEqual(volume, volumeCopy) {
if _, err := h.volumes.Update(volumeCopy); err != nil {
return nil, err
}
}
logrus.Debugf("handling PVC updating %s/%s", pvc.Namespace, pvc.Name)
h.restoreController.EnqueueAfter(pvc.Namespace, restoreName, 5*time.Second)
return nil, nil
}
func (h *RestoreHandler) LHEngineOnChange(_ string, lhEngine *lhv1beta2.Engine) (*lhv1beta2.Engine, error) {
if lhEngine == nil || lhEngine.DeletionTimestamp != nil || len(lhEngine.Status.RestoreStatus) == 0 {
return nil, nil
}
volume, err := h.volumeCache.Get(util.LonghornSystemNamespaceName, lhEngine.Spec.VolumeName)
if err != nil {
return nil, err
}
pvcNamespace, ok := volume.Annotations[pvcNameSpaceAnnotation]
if !ok {
return nil, nil
}
pvcName, ok := volume.Annotations[pvcNameAnnotation]
if !ok {
return nil, nil
}
restoreName, ok := volume.Annotations[restoreNameAnnotation]
if !ok {
return nil, nil
}
//vmRestore could be deleted after restoere completed
vmRestore, err := h.restoreCache.Get(pvcNamespace, restoreName)
if err != nil {
return nil, nil
}
vmRestoreCpy := vmRestore.DeepCopy()
for i, volumeRestore := range vmRestore.Status.VolumeRestores {
if volumeRestore.PersistentVolumeClaim.ObjectMeta.Namespace != pvcNamespace {
continue
}
if volumeRestore.PersistentVolumeClaim.ObjectMeta.Name != pvcName {
continue
}
vmRestoreCpy.Status.VolumeRestores[i].LonghornEngineName = pointer.String(lhEngine.Name)
vmRestoreCpy.Status.VolumeRestores[i].VolumeSize = volume.Spec.Size
break
}
if !reflect.DeepEqual(vmRestore.Status, vmRestoreCpy.Status) {
if _, err := h.restores.Update(vmRestoreCpy); err != nil {
return nil, err
}
}
//enqueue to trigger progress update
h.restoreController.Enqueue(pvcNamespace, restoreName)
return nil, nil
}
// VMOnChange watching the VM on change and enqueue the vmRestore if it has the restore annotation
func (h *RestoreHandler) VMOnChange(_ string, vm *kubevirtv1.VirtualMachine) (*kubevirtv1.VirtualMachine, error) {
if vm == nil || vm.DeletionTimestamp != nil {
return nil, nil
}
restoreName, ok := vm.Annotations[restoreNameAnnotation]
if !ok {
return nil, nil
}
logrus.Debugf("handling VM updating %s/%s", vm.Namespace, vm.Name)
h.restoreController.EnqueueAfter(vm.Namespace, restoreName, 5*time.Second)
return nil, nil
}
func (h *RestoreHandler) initStatus(restore *harvesterv1.VirtualMachineRestore) error {
restoreCpy := restore.DeepCopy()
restoreCpy.Status = &harvesterv1.VirtualMachineRestoreStatus{
Complete: pointer.BoolPtr(false),
Conditions: []harvesterv1.Condition{
newProgressingCondition(corev1.ConditionTrue, "", "Initializing VirtualMachineRestore"),
newReadyCondition(corev1.ConditionFalse, "", "Initializing VirtualMachineRestore"),
},
}
if _, err := h.restores.Update(restoreCpy); err != nil {
return err
}
return nil
}
func (h *RestoreHandler) initVolumesStatus(vmRestore *harvesterv1.VirtualMachineRestore, backup *harvesterv1.VirtualMachineBackup) error {
restoreCpy := vmRestore.DeepCopy()
if restoreCpy.Status.VolumeRestores == nil {
volumeRestores, err := getVolumeRestores(restoreCpy, backup)
if err != nil {
return err
}
restoreCpy.Status.VolumeRestores = volumeRestores
}
if !IsNewVMOrHasRetainPolicy(vmRestore) && vmRestore.Status.DeletedVolumes == nil {
var deletedVolumes []string
for _, vol := range backup.Status.VolumeBackups {
deletedVolumes = append(deletedVolumes, vol.PersistentVolumeClaim.ObjectMeta.Name)
}
restoreCpy.Status.DeletedVolumes = deletedVolumes
}
if _, err := h.restores.Update(restoreCpy); err != nil {
return err
}
return nil
}
// getVM returns restore target VM
func (h *RestoreHandler) getVM(vmRestore *harvesterv1.VirtualMachineRestore) (*kubevirtv1.VirtualMachine, error) {
switch vmRestore.Spec.Target.Kind {
case kubevirtv1.VirtualMachineGroupVersionKind.Kind:
vm, err := h.vmCache.Get(vmRestore.Namespace, vmRestore.Spec.Target.Name)
if err != nil {
if apierrors.IsNotFound(err) {
return nil, nil
}
return nil, err
}
return vm, nil
}
return nil, fmt.Errorf("unknown target %+v", vmRestore.Spec.Target)
}
// getVolumeRestores helps to create an array of new restored volumes
func getVolumeRestores(vmRestore *harvesterv1.VirtualMachineRestore, backup *harvesterv1.VirtualMachineBackup) ([]harvesterv1.VolumeRestore, error) {
restores := make([]harvesterv1.VolumeRestore, 0, len(backup.Status.VolumeBackups))
for _, vb := range backup.Status.VolumeBackups {
found := false
for _, vr := range vmRestore.Status.VolumeRestores {
if vb.VolumeName == vr.VolumeName {
restores = append(restores, vr)
found = true
break
}
}
if !found {
if vb.Name == nil {
return nil, fmt.Errorf("VolumeSnapshotName missing %+v", vb)
}
vr := harvesterv1.VolumeRestore{
VolumeName: vb.VolumeName,
PersistentVolumeClaim: harvesterv1.PersistentVolumeClaimSourceSpec{
ObjectMeta: metav1.ObjectMeta{
Name: getRestorePVCName(vmRestore, vb.VolumeName),
Namespace: vmRestore.Namespace,
},
Spec: vb.PersistentVolumeClaim.Spec,
},
VolumeBackupName: *vb.Name,
}
restores = append(restores, vr)
}
}
return restores, nil
}
func (h *RestoreHandler) reconcileResources(
vmRestore *harvesterv1.VirtualMachineRestore,
backup *harvesterv1.VirtualMachineBackup,
) (*kubevirtv1.VirtualMachine, bool, error) {
// reconcile restoring volumes and create new PVC from CSI volumeSnapshot if not exist
isVolumesReady, err := h.reconcileVolumeRestores(vmRestore, backup)
if err != nil {
return nil, false, err
}
// reconcile VM
vm, err := h.reconcileVM(vmRestore, backup)
if err != nil {
return nil, false, err
}
//restore referenced secrets
if err := h.reconcileSecretBackups(vmRestore, backup, vm); err != nil {
return nil, false, err
}
return vm, isVolumesReady, nil
}
func (h *RestoreHandler) reconcileVolumeRestores(
vmRestore *harvesterv1.VirtualMachineRestore,
backup *harvesterv1.VirtualMachineBackup,
) (bool, error) {
isVolumesReady := true
for i, volumeRestore := range vmRestore.Status.VolumeRestores {
pvc, err := h.pvcCache.Get(vmRestore.Namespace, volumeRestore.PersistentVolumeClaim.ObjectMeta.Name)
if apierrors.IsNotFound(err) {
volumeBackup := backup.Status.VolumeBackups[i]
if err = h.createRestoredPVC(vmRestore, volumeBackup, volumeRestore); err != nil {
return false, err
}
isVolumesReady = false
continue
}
if err != nil {
return false, err
}
if pvc.Status.Phase == corev1.ClaimPending {
isVolumesReady = false
} else if pvc.Status.Phase != corev1.ClaimBound {
return false, fmt.Errorf("PVC %s/%s in status %q", pvc.Namespace, pvc.Name, pvc.Status.Phase)
}
}
return isVolumesReady, nil
}
func (h *RestoreHandler) reconcileVM(
vmRestore *harvesterv1.VirtualMachineRestore,
backup *harvesterv1.VirtualMachineBackup,
) (*kubevirtv1.VirtualMachine, error) {
// create new VM if it's not exist
vm, err := h.getVM(vmRestore)
if err != nil {
return nil, err
} else if vm == nil && err == nil {
vm, err = h.createNewVM(vmRestore, backup)
if err != nil {
return nil, err
}
}
// make sure target VM has correct annotations
restoreID := getRestoreID(vmRestore)
if lastRestoreID, ok := vm.Annotations[lastRestoreAnnotation]; ok && lastRestoreID == restoreID {
return vm, nil
}
// VM doesn't have correct annotations like restore to existing VM.
// We update its volumes to new reconsile volumes
newVolumes, err := getNewVolumes(&backup.Status.SourceSpec.Spec, vmRestore)
if err != nil {
return nil, err
}
vmCpy := vm.DeepCopy()
vmCpy.Spec = backup.Status.SourceSpec.Spec
//if the source runStratedy is RerunOnFailure, Kubevirt will not start the new VMI
//set the VM runStrategy as Halted, VMI will be kicked off in startVM()
haltedRunStrategy := kubevirtv1.RunStrategyHalted
vmCpy.Spec.RunStrategy = &haltedRunStrategy
vmCpy.Spec.Template.Spec.Volumes = newVolumes
if vmCpy.Annotations == nil {
vmCpy.Annotations = make(map[string]string)
}
vmCpy.Annotations[lastRestoreAnnotation] = restoreID
vmCpy.Annotations[restoreNameAnnotation] = vmRestore.Name
delete(vmCpy.Annotations, util.AnnotationVolumeClaimTemplates)
if vm, err = h.vms.Update(vmCpy); err != nil {
return nil, err
}
return vm, nil
}
func (h *RestoreHandler) reconcileSecretBackups(
vmRestore *harvesterv1.VirtualMachineRestore,
backup *harvesterv1.VirtualMachineBackup,
vm *kubevirtv1.VirtualMachine,
) error {
ownerRefs := configVMOwner(vm)
if !vmRestore.Spec.NewVM {
for _, secretBackup := range backup.Status.SecretBackups {
if err := h.createOrUpdateSecret(vmRestore.Namespace, secretBackup.Name, secretBackup.Data, ownerRefs); err != nil {
return err
}
}
return nil
}
// Create new secret for new VM
for _, secretBackup := range backup.Status.SecretBackups {
newSecretName := getSecretRefName(vmRestore.Spec.Target.Name, secretBackup.Name)
if err := h.createOrUpdateSecret(vmRestore.Namespace, newSecretName, secretBackup.Data, ownerRefs); err != nil {
return err
}
}
return nil
}
func (h *RestoreHandler) createOrUpdateSecret(namespace, name string, data map[string][]byte, ownerRefs []metav1.OwnerReference) error {
secret, err := h.secretCache.Get(namespace, name)
if err != nil {
if !apierrors.IsNotFound(err) {
return err
}
logrus.Infof("create secret %s/%s", namespace, name)
secret = &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: namespace,
OwnerReferences: ownerRefs,
},
Data: data,
}
if _, err := h.secretClient.Create(secret); err != nil {
return err
}
return nil
}
secretCpy := secret.DeepCopy()
secretCpy.Data = data
if !reflect.DeepEqual(secret, secretCpy) {
logrus.Infof("update secret %s/%s", namespace, name)
if _, err := h.secretClient.Update(secretCpy); err != nil {
return err
}
}
return nil
}
func (h *RestoreHandler) getVMBackup(vmRestore *harvesterv1.VirtualMachineRestore) (*harvesterv1.VirtualMachineBackup, error) {
backup, err := h.backupCache.Get(vmRestore.Spec.VirtualMachineBackupNamespace, vmRestore.Spec.VirtualMachineBackupName)
if err != nil {
return nil, err
}
if !IsBackupReady(backup) {
return nil, fmt.Errorf("VMBackup %s is not ready", backup.Name)
}
if backup.Status.SourceSpec == nil {
return nil, fmt.Errorf("empty vm backup source spec of %s", backup.Name)
}
return backup, nil
}
// createNewVM helps to create new target VM and set the associated owner reference
func (h *RestoreHandler) createNewVM(restore *harvesterv1.VirtualMachineRestore, backup *harvesterv1.VirtualMachineBackup) (*kubevirtv1.VirtualMachine, error) {
vmName := restore.Spec.Target.Name
logrus.Infof("restore target does not exist, creating a new vm %s", vmName)
restoreID := getRestoreID(restore)
vmCpy := backup.Status.SourceSpec.DeepCopy()
newVMAnnotations := map[string]string{
lastRestoreAnnotation: restoreID,
restoreNameAnnotation: restore.Name,
}
if reservedMem, ok := vmCpy.ObjectMeta.Annotations[util.AnnotationReservedMemory]; ok {
newVMAnnotations[util.AnnotationReservedMemory] = reservedMem
}
newVMSpecAnnotations, err := sanitizeVirtualMachineAnnotationsForRestore(restore, vmCpy.Spec.Template.ObjectMeta.Annotations)
if err != nil {
return nil, err
}
defaultRunStrategy := kubevirtv1.RunStrategyRerunOnFailure
if backup.Status.SourceSpec.Spec.RunStrategy != nil {
defaultRunStrategy = *backup.Status.SourceSpec.Spec.RunStrategy
}
vm := &kubevirtv1.VirtualMachine{
ObjectMeta: metav1.ObjectMeta{
Name: vmName,
Namespace: restore.Namespace,
Annotations: newVMAnnotations,
},
Spec: kubevirtv1.VirtualMachineSpec{
RunStrategy: &defaultRunStrategy,
Template: &kubevirtv1.VirtualMachineInstanceTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Annotations: newVMSpecAnnotations,
Labels: map[string]string{
util.LabelVMCreator: "harvester",
util.LabelVMName: vmName,
},
},
Spec: sanitizeVirtualMachineForRestore(restore, vmCpy.Spec.Template.Spec),
},
},
}
newVolumes, err := getNewVolumes(&vm.Spec, restore)
if err != nil {
return nil, err
}
vm.Spec.Template.Spec.Volumes = newVolumes
if !restore.Spec.KeepMacAddress {
for i := range vm.Spec.Template.Spec.Domain.Devices.Interfaces {
// remove the copied mac address of the new VM
vm.Spec.Template.Spec.Domain.Devices.Interfaces[i].MacAddress = ""
}
}
newVM, err := h.vms.Create(vm)
if err != nil {
return nil, err
}
return newVM, nil
}
func (h *RestoreHandler) updateOwnerRefAndTargetUID(vmRestore *harvesterv1.VirtualMachineRestore, vm *kubevirtv1.VirtualMachine) error {
restoreCpy := vmRestore.DeepCopy()
if restoreCpy.Status.TargetUID == nil {
restoreCpy.Status.TargetUID = &vm.UID
}
// set vmRestore owner reference to the target VM
restoreCpy.SetOwnerReferences(configVMOwner(vm))
if _, err := h.restores.Update(restoreCpy); err != nil {
return err
}
return nil
}
// createRestoredPVC helps to create new PVC from CSI volumeSnapshot
func (h *RestoreHandler) createRestoredPVC(
vmRestore *harvesterv1.VirtualMachineRestore,
volumeBackup harvesterv1.VolumeBackup,
volumeRestore harvesterv1.VolumeRestore,
) error {
if volumeBackup.Name == nil {
return fmt.Errorf("missing VolumeSnapshot name")
}
dataSourceName := *volumeBackup.Name
if vmRestore.Namespace != volumeBackup.PersistentVolumeClaim.ObjectMeta.Namespace {
// create volumesnapshot if namespace is different
volumeSnapshot, err := h.getOrCreateVolumeSnapshot(vmRestore, volumeBackup)
if err != nil {
return err
}
dataSourceName = volumeSnapshot.Name
}
annotations := map[string]string{}
for key, value := range volumeBackup.PersistentVolumeClaim.ObjectMeta.Annotations {
needSkip := false
for _, prefix := range restoreAnnotationsToDelete {
if strings.HasPrefix(key, prefix) {
needSkip = true
break
}
}
if !needSkip {
annotations[key] = value
}
}
annotations[restoreNameAnnotation] = vmRestore.Name
_, err := h.pvcClient.Create(&corev1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Name: volumeRestore.PersistentVolumeClaim.ObjectMeta.Name,
Namespace: vmRestore.Namespace,
Labels: volumeBackup.PersistentVolumeClaim.ObjectMeta.Labels,
Annotations: annotations,
OwnerReferences: []metav1.OwnerReference{
{
APIVersion: harvesterv1.SchemeGroupVersion.String(),
Kind: vmRestoreKindName,
Name: vmRestore.Name,
UID: vmRestore.UID,
Controller: pointer.BoolPtr(true),
BlockOwnerDeletion: pointer.BoolPtr(true),
},
},
},
Spec: corev1.PersistentVolumeClaimSpec{
AccessModes: volumeBackup.PersistentVolumeClaim.Spec.AccessModes,
DataSource: &corev1.TypedLocalObjectReference{
APIGroup: pointer.StringPtr(snapshotv1.SchemeGroupVersion.Group),
Kind: volumeSnapshotKindName,
Name: dataSourceName,
},
Resources: volumeBackup.PersistentVolumeClaim.Spec.Resources,
StorageClassName: volumeBackup.PersistentVolumeClaim.Spec.StorageClassName,
VolumeMode: volumeBackup.PersistentVolumeClaim.Spec.VolumeMode,
},
})
return err
}
func (h *RestoreHandler) getOrCreateVolumeSnapshotContent(
vmRestore *harvesterv1.VirtualMachineRestore,
volumeBackup harvesterv1.VolumeBackup,
) (*snapshotv1.VolumeSnapshotContent, error) {
volumeSnapshotContentName := h.constructVolumeSnapshotContentName(vmRestore.Namespace, vmRestore.Name, *volumeBackup.Name)
if volumeSnapshotContent, err := h.snapshotContentCache.Get(volumeSnapshotContentName); err != nil {
if !apierrors.IsNotFound(err) {
return nil, err
}
} else {
return volumeSnapshotContent, nil
}
lhBackup, err := h.lhbackupCache.Get(util.LonghornSystemNamespaceName, *volumeBackup.LonghornBackupName)
if err != nil {
return nil, err
}
// Ref: https://longhorn.io/docs/1.2.3/snapshots-and-backups/csi-snapshot-support/restore-a-backup-via-csi/#restore-a-backup-that-has-no-associated-volumesnapshot
snapshotHandle := fmt.Sprintf("bs://%s/%s", volumeBackup.PersistentVolumeClaim.ObjectMeta.Name, lhBackup.Name)
logrus.Debugf("create VolumeSnapshotContent %s ...", volumeSnapshotContentName)
return h.snapshotContents.Create(&snapshotv1.VolumeSnapshotContent{
ObjectMeta: metav1.ObjectMeta{
Name: volumeSnapshotContentName,
Namespace: vmRestore.Namespace,
OwnerReferences: []metav1.OwnerReference{
{
APIVersion: harvesterv1.SchemeGroupVersion.String(),
Kind: vmRestoreKindName,
Name: vmRestore.Name,
UID: vmRestore.UID,
},
},
},
Spec: snapshotv1.VolumeSnapshotContentSpec{
Driver: "driver.longhorn.io",
// Use Retain policy to prevent LH Backup from being removed when users delete a VM.
DeletionPolicy: snapshotv1.VolumeSnapshotContentRetain,
Source: snapshotv1.VolumeSnapshotContentSource{
SnapshotHandle: pointer.StringPtr(snapshotHandle),
},
VolumeSnapshotClassName: pointer.StringPtr(settings.VolumeSnapshotClass.Get()),
VolumeSnapshotRef: corev1.ObjectReference{
Name: h.constructVolumeSnapshotName(vmRestore.Name, *volumeBackup.Name),
Namespace: vmRestore.Namespace,
},
},
})
}
func (h *RestoreHandler) getOrCreateVolumeSnapshot(
vmRestore *harvesterv1.VirtualMachineRestore,
volumeBackup harvesterv1.VolumeBackup,
) (*snapshotv1.VolumeSnapshot, error) {
volumeSnapshotName := h.constructVolumeSnapshotName(vmRestore.Name, *volumeBackup.Name)
if volumeSnapshot, err := h.snapshotCache.Get(vmRestore.Namespace, volumeSnapshotName); err != nil {
if !apierrors.IsNotFound(err) {
return nil, err
}
} else {
return volumeSnapshot, nil
}
volumeSnapshotContent, err := h.getOrCreateVolumeSnapshotContent(vmRestore, volumeBackup)
if err != nil {
return nil, err
}
logrus.Debugf("create VolumeSnapshot %s/%s", vmRestore.Namespace, volumeSnapshotName)
return h.snapshots.Create(&snapshotv1.VolumeSnapshot{
ObjectMeta: metav1.ObjectMeta{
Name: volumeSnapshotName,
Namespace: vmRestore.Namespace,
OwnerReferences: []metav1.OwnerReference{
{
APIVersion: harvesterv1.SchemeGroupVersion.String(),
Kind: vmRestoreKindName,
Name: vmRestore.Name,
UID: vmRestore.UID,
BlockOwnerDeletion: pointer.BoolPtr(true),
},
},
},
Spec: snapshotv1.VolumeSnapshotSpec{
Source: snapshotv1.VolumeSnapshotSource{
VolumeSnapshotContentName: pointer.StringPtr(volumeSnapshotContent.Name),
},
VolumeSnapshotClassName: pointer.StringPtr(settings.VolumeSnapshotClass.Get()),
},
})
}
func (h *RestoreHandler) deleteOldPVC(vmRestore *harvesterv1.VirtualMachineRestore, vm *kubevirtv1.VirtualMachine) error {
if IsNewVMOrHasRetainPolicy(vmRestore) {
logrus.Infof("skip deleting old PVC of vm %s/%s", vm.Name, vm.Namespace)
return nil
}
// clean up existing pvc
for _, volName := range vmRestore.Status.DeletedVolumes {
vol, err := h.pvcCache.Get(vmRestore.Namespace, volName)
if err != nil && !apierrors.IsNotFound(err) {
return err
}
if vol != nil {
err = h.pvcClient.Delete(vol.Namespace, vol.Name, &metav1.DeleteOptions{})
if err != nil {
return err
}
}
}
return nil
}
func (h *RestoreHandler) startVM(vm *kubevirtv1.VirtualMachine) error {
runStrategy, err := vm.RunStrategy()
if err != nil {
return err
}
logrus.Infof("starting the vm %s, current state running:%v", vm.Name, runStrategy)
switch runStrategy {
case kubevirtv1.RunStrategyAlways:
return nil
case kubevirtv1.RunStrategyRerunOnFailure:
vmi, err := h.vmiCache.Get(vm.Namespace, vm.Name)
if err != nil {
if apierrors.IsNotFound(err) {
return nil
}
return err
}
if vmi.Status.Phase == kubevirtv1.Succeeded {
logrus.Infof("restart vmi %s in phase %v", vmi.Name, vmi.Status.Phase)
return h.restClient.Put().Namespace(vm.Namespace).Resource("virtualmachines").SubResource("start").Name(vm.Name).Do(h.context).Error()
}
return nil
case kubevirtv1.RunStrategyManual:
if vmi, err := h.vmiCache.Get(vm.Namespace, vm.Name); err == nil {
if vmi != nil && !vmi.IsFinal() && vmi.Status.Phase != kubevirtv1.Unknown && vmi.Status.Phase != kubevirtv1.VmPhaseUnset {
// vm is already running
return nil
}
}
return h.restClient.Put().Namespace(vm.Namespace).Resource("virtualmachines").SubResource("start").Name(vm.Name).Do(h.context).Error()
case kubevirtv1.RunStrategyHalted:
return h.restClient.Put().Namespace(vm.Namespace).Resource("virtualmachines").SubResource("start").Name(vm.Name).Do(h.context).Error()
default:
// skip
}
return nil
}
func (h *RestoreHandler) updateRestoreProgress(volumeRestore *harvesterv1.VolumeRestore, isVolumesReady bool) error {
if volumeRestore.LonghornEngineName == nil {
return nil
}
lhEngine, err := h.lhengineCache.Get(util.LonghornSystemNamespaceName, *volumeRestore.LonghornEngineName)
if err != nil {
return err
}
var volumeRestoreProgress int
defer func() {
if volumeRestoreProgress > volumeRestore.Progress {
volumeRestore.Progress = volumeRestoreProgress
}
}()
if isVolumesReady {
volumeRestoreProgress = restoreProgressComplete
return nil
}
var numReplica int
var replicaRestoreProgressSum int
for _, rs := range lhEngine.Status.RestoreStatus {
if rs == nil {
continue
}
// replica's restore status could have IsRestoring == false before the restoring starts,
// so we increase the numReplica before checking IsRestoring,
// this makes replica with IsRestoring == false adding zero to current volume progress
numReplica++
if !rs.IsRestoring {
continue
}
replicaRestoreProgressSum += rs.Progress
}
if numReplica > 0 {
volumeRestoreProgress = replicaRestoreProgressSum / numReplica
}