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planner.go
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planner.go
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package clone
import (
"context"
"fmt"
"reflect"
"sort"
"sync"
"github.com/go-logr/logr"
snapshotv1 "github.com/kubernetes-csi/external-snapshotter/client/v6/apis/volumesnapshot/v1"
corev1 "k8s.io/api/core/v1"
storagev1 "k8s.io/api/storage/v1"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/record"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
cdiv1 "kubevirt.io/containerized-data-importer-api/pkg/apis/core/v1beta1"
cc "kubevirt.io/containerized-data-importer/pkg/controller/common"
)
const (
// CloneValidationFailed reports that a clone wasn't admitted by our validation mechanism (reason)
CloneValidationFailed = "CloneValidationFailed"
// MessageCloneValidationFailed reports that a clone wasn't admitted by our validation mechanism (message)
MessageCloneValidationFailed = "The clone doesn't meet the validation requirements"
// CloneWithoutSource reports that the source of a clone doesn't exists (reason)
CloneWithoutSource = "CloneWithoutSource"
// MessageCloneWithoutSource reports that the source of a clone doesn't exists (message)
MessageCloneWithoutSource = "The source %s %s doesn't exist"
// NoVolumeSnapshotClass reports that no compatible volumesnapshotclass was found (reason)
NoVolumeSnapshotClass = "NoVolumeSnapshotClass"
// MessageNoVolumeSnapshotClass reports that no compatible volumesnapshotclass was found (message)
MessageNoVolumeSnapshotClass = "No compatible volumesnapshotclass found"
// IncompatibleVolumeModes reports that the volume modes of source and target are incompatible (reason)
IncompatibleVolumeModes = "IncompatibleVolumeModes"
// MessageIncompatibleVolumeModes reports that the volume modes of source and target are incompatible (message)
MessageIncompatibleVolumeModes = "The volume modes of source and target are incompatible"
// NoVolumeExpansion reports that no volume expansion is possible (reason)
NoVolumeExpansion = "NoVolumeExpansion"
// MessageNoVolumeExpansion reports that no volume expansion is possible (message)
MessageNoVolumeExpansion = "No volume expansion is possible"
// NoProvisionerMatch reports that the storageclass provisioner does not match the volumesnapshotcontent driver (reason)
NoProvisionerMatch = "NoProvisionerMatch"
// MessageNoProvisionerMatch reports that the storageclass provisioner does not match the volumesnapshotcontent driver (message)
MessageNoProvisionerMatch = "The storageclass provisioner does not match the volumesnapshotcontent driver"
// IncompatibleProvisioners reports that the provisioners are incompatible (reason)
IncompatibleProvisioners = "IncompatibleProvisioners"
// MessageIncompatibleProvisioners reports that the provisioners are incompatible (message)
MessageIncompatibleProvisioners = "Provisioners are incompatible"
)
// Planner plans clone operations
type Planner struct {
RootObjectType client.ObjectList
OwnershipLabel string
UIDField string
Image string
PullPolicy corev1.PullPolicy
InstallerLabels map[string]string
Client client.Client
Recorder record.EventRecorder
Controller controller.Controller
watchingCore bool
watchingSnapshots bool
watchMutex sync.Mutex
}
// Phase is the interface implemented by all clone phases
type Phase interface {
Name() string
Reconcile(context.Context) (*reconcile.Result, error)
}
// PhaseStatus contains phase status data
type PhaseStatus struct {
Progress string
Annotations map[string]string
}
// StatusReporter allows a phase to report status
type StatusReporter interface {
Status(context.Context) (*PhaseStatus, error)
}
// list of all possible (core) types created
var coreTypesCreated = []client.Object{
&corev1.PersistentVolumeClaim{},
&corev1.Pod{},
}
// all types that may have been created
var listTypesToDelete = []client.ObjectList{
&corev1.PersistentVolumeClaimList{},
&corev1.PodList{},
&snapshotv1.VolumeSnapshotList{},
}
// AddCoreWatches watches "core" types
func (p *Planner) AddCoreWatches(log logr.Logger) error {
p.watchMutex.Lock()
defer p.watchMutex.Unlock()
if p.watchingCore {
return nil
}
for _, obj := range coreTypesCreated {
if err := p.watchOwned(log, obj); err != nil {
return err
}
}
p.watchingCore = true
return nil
}
// ChooseStrategyArgs are args for ChooseStrategy function
type ChooseStrategyArgs struct {
Log logr.Logger
TargetClaim *corev1.PersistentVolumeClaim
DataSource *cdiv1.VolumeCloneSource
}
// ChooseStrategyResult is result returned by ChooseStrategy function
type ChooseStrategyResult struct {
Strategy cdiv1.CDICloneStrategy
FallbackReason *string
}
// ChooseStrategy picks the strategy for a clone op
func (p *Planner) ChooseStrategy(ctx context.Context, args *ChooseStrategyArgs) (*ChooseStrategyResult, error) {
if IsDataSourcePVC(args.DataSource.Spec.Source.Kind) {
args.Log.V(3).Info("Getting strategy for PVC source")
return p.computeStrategyForSourcePVC(ctx, args)
}
if IsDataSourceSnapshot(args.DataSource.Spec.Source.Kind) {
args.Log.V(3).Info("Getting strategy for Snapshot source")
return p.computeStrategyForSourceSnapshot(ctx, args)
}
return nil, fmt.Errorf("unsupported datasource")
}
// PlanArgs are args to plan clone op for populator
type PlanArgs struct {
Log logr.Logger
TargetClaim *corev1.PersistentVolumeClaim
DataSource *cdiv1.VolumeCloneSource
Strategy cdiv1.CDICloneStrategy
}
// Plan creates phases for populator clone
func (p *Planner) Plan(ctx context.Context, args *PlanArgs) ([]Phase, error) {
if args.Strategy == cdiv1.CloneStrategySnapshot {
if err := p.watchSnapshots(ctx, args.Log); err != nil {
return nil, err
}
}
if IsDataSourcePVC(args.DataSource.Spec.Source.Kind) {
if args.Strategy == cdiv1.CloneStrategyHostAssisted {
args.Log.V(3).Info("Planning host assisted clone from PVC")
return p.planHostAssistedFromPVC(ctx, args)
} else if args.Strategy == cdiv1.CloneStrategySnapshot {
args.Log.V(3).Info("Planning snapshot clone from PVC")
return p.planSnapshotFromPVC(ctx, args)
} else if args.Strategy == cdiv1.CloneStrategyCsiClone {
args.Log.V(3).Info("Planning csi clone from PVC")
return p.planCSIClone(ctx, args)
}
}
if IsDataSourceSnapshot(args.DataSource.Spec.Source.Kind) {
if args.Strategy == cdiv1.CloneStrategyHostAssisted {
args.Log.V(3).Info("Planning host assisted clone from Snapshot")
return p.planHostAssistedFromSnapshot(ctx, args)
} else if args.Strategy == cdiv1.CloneStrategySnapshot {
args.Log.V(3).Info("Planning Smart clone from Snapshot")
return p.planSmartCloneFromSnapshot(ctx, args)
}
}
return nil, fmt.Errorf("unknown strategy/source %s", string(args.Strategy))
}
// Cleanup cleans up after a clone op
func (p *Planner) Cleanup(ctx context.Context, log logr.Logger, owner client.Object) error {
log.V(3).Info("Cleaning up for obj", "obj", owner)
for _, lt := range listTypesToDelete {
ls, err := labels.Parse(fmt.Sprintf("%s=%s", p.OwnershipLabel, string(owner.GetUID())))
if err != nil {
return err
}
lo := &client.ListOptions{
LabelSelector: ls,
}
if err := cc.BulkDeleteResources(ctx, p.Client, lt, lo); err != nil {
return err
}
}
return nil
}
func (p *Planner) watchSnapshots(ctx context.Context, log logr.Logger) error {
p.watchMutex.Lock()
defer p.watchMutex.Unlock()
if p.watchingSnapshots {
return nil
}
vsl := &snapshotv1.VolumeSnapshotList{}
lo := &client.ListOptions{Limit: 1}
if err := p.Client.List(ctx, vsl, lo); err != nil {
if meta.IsNoMatchError(err) {
return nil
}
}
if err := p.watchOwned(log, &snapshotv1.VolumeSnapshot{}); err != nil {
return err
}
log.V(3).Info("watching volumesnapshots now")
p.watchingSnapshots = true
return nil
}
func (p *Planner) watchOwned(log logr.Logger, obj client.Object) error {
objList := p.RootObjectType.DeepCopyObject().(client.ObjectList)
if err := p.Controller.Watch(&source.Kind{Type: obj}, handler.EnqueueRequestsFromMapFunc(
func(obj client.Object) (reqs []reconcile.Request) {
uid, ok := obj.GetLabels()[p.OwnershipLabel]
if !ok {
return
}
matchingFields := client.MatchingFields{
p.UIDField: uid,
}
if err := p.Client.List(context.Background(), objList, matchingFields); err != nil {
log.Error(err, "Unable to list resource", "matchingFields", matchingFields)
return
}
sv := reflect.ValueOf(objList).Elem()
iv := sv.FieldByName("Items")
for i := 0; i < iv.Len(); i++ {
o := iv.Index(i).Addr().Interface().(client.Object)
reqs = append(reqs, reconcile.Request{
NamespacedName: types.NamespacedName{
Namespace: o.GetNamespace(),
Name: o.GetName(),
},
})
}
return
}),
); err != nil {
return err
}
return nil
}
func (p *Planner) computeStrategyForSourcePVC(ctx context.Context, args *ChooseStrategyArgs) (*ChooseStrategyResult, error) {
res := &ChooseStrategyResult{}
if ok, err := p.validateTargetStorageClassAssignment(ctx, args); !ok || err != nil {
return nil, err
}
sourceClaim := &corev1.PersistentVolumeClaim{}
exists, err := getResource(ctx, p.Client, args.DataSource.Namespace, args.DataSource.Spec.Source.Name, sourceClaim)
if err != nil {
return nil, err
}
if !exists {
message := fmt.Sprintf(MessageCloneWithoutSource, "pvc", args.DataSource.Spec.Source.Name)
p.Recorder.Event(args.TargetClaim, corev1.EventTypeWarning, CloneWithoutSource, message)
args.Log.V(3).Info("Source PVC does not exist, cannot compute strategy")
return nil, nil
}
if err = p.validateSourcePVC(args, sourceClaim); err != nil {
p.Recorder.Event(args.TargetClaim, corev1.EventTypeWarning, CloneValidationFailed, MessageCloneValidationFailed)
args.Log.V(3).Info("Validation failed", "target", args.TargetClaim, "source", sourceClaim)
return nil, err
}
strategy := cdiv1.CloneStrategySnapshot
cs, err := GetGlobalCloneStrategyOverride(ctx, p.Client)
if err != nil {
return nil, err
}
if cs != nil {
strategy = *cs
} else if args.TargetClaim.Spec.StorageClassName != nil {
sp := &cdiv1.StorageProfile{}
exists, err := getResource(ctx, p.Client, "", *args.TargetClaim.Spec.StorageClassName, sp)
if err != nil {
return nil, err
}
if !exists {
args.Log.V(3).Info("missing storageprofile for", "name", *args.TargetClaim.Spec.StorageClassName)
}
if exists && sp.Status.CloneStrategy != nil {
strategy = *sp.Status.CloneStrategy
}
}
if strategy == cdiv1.CloneStrategySnapshot {
n, err := GetCompatibleVolumeSnapshotClass(ctx, p.Client, args.Log, p.Recorder, sourceClaim, args.TargetClaim)
if err != nil {
return nil, err
}
if n == nil {
p.fallbackToHostAssisted(args.TargetClaim, res, NoVolumeSnapshotClass, MessageNoVolumeSnapshotClass)
return res, nil
}
}
res.Strategy = strategy
if strategy == cdiv1.CloneStrategySnapshot ||
strategy == cdiv1.CloneStrategyCsiClone {
if err := p.validateAdvancedClonePVC(ctx, args, res, sourceClaim); err != nil {
return nil, err
}
}
return res, nil
}
func (p *Planner) computeStrategyForSourceSnapshot(ctx context.Context, args *ChooseStrategyArgs) (*ChooseStrategyResult, error) {
res := &ChooseStrategyResult{}
if ok, err := p.validateTargetStorageClassAssignment(ctx, args); !ok || err != nil {
return nil, err
}
// Check that snapshot exists
sourceSnapshot := &snapshotv1.VolumeSnapshot{}
exists, err := getResource(ctx, p.Client, args.DataSource.Namespace, args.DataSource.Spec.Source.Name, sourceSnapshot)
if err != nil {
return nil, err
}
if !exists {
message := fmt.Sprintf(MessageCloneWithoutSource, "snapshot", args.DataSource.Spec.Source.Name)
p.Recorder.Event(args.TargetClaim, corev1.EventTypeWarning, CloneWithoutSource, message)
args.Log.V(3).Info("Source Snapshot does not exist, cannot compute strategy")
return nil, nil
}
// Do snapshot and storage class validation
targetStorageClass, err := GetStorageClassForClaim(ctx, p.Client, args.TargetClaim)
if err != nil {
return nil, err
}
if targetStorageClass == nil {
return nil, fmt.Errorf("target claim's storageclass doesn't exist, clone will not work")
}
valid, err := cc.ValidateSnapshotCloneProvisioners(ctx, p.Client, sourceSnapshot, targetStorageClass)
if err != nil {
return nil, err
}
if !valid {
p.fallbackToHostAssisted(args.TargetClaim, res, NoProvisionerMatch, MessageNoProvisionerMatch)
args.Log.V(3).Info("Provisioner differs, need to fall back to host assisted")
return res, nil
}
// Lastly, do size validation to determine whether to use dumb or smart cloning
valid, err = cc.ValidateSnapshotCloneSize(sourceSnapshot, &args.TargetClaim.Spec, targetStorageClass, args.Log)
if err != nil {
return nil, err
}
if !valid {
p.fallbackToHostAssisted(args.TargetClaim, res, NoVolumeExpansion, MessageNoVolumeExpansion)
return res, nil
}
res.Strategy = cdiv1.CloneStrategySnapshot
return res, nil
}
func (p *Planner) validateTargetStorageClassAssignment(ctx context.Context, args *ChooseStrategyArgs) (bool, error) {
if args.TargetClaim.Spec.StorageClassName == nil {
args.Log.V(3).Info("Target PVC has nil storage class, cannot compute strategy")
return false, nil
}
if *args.TargetClaim.Spec.StorageClassName == "" {
args.Log.V(3).Info("Target PVC has \"\" storage class, cannot compute strategy")
return false, fmt.Errorf("claim has emptystring storageclass, will not work")
}
sc, err := GetStorageClassForClaim(ctx, p.Client, args.TargetClaim)
if err != nil {
return false, err
}
if sc == nil {
args.Log.V(3).Info("Target PVC has no storage class, cannot compute strategy")
return false, fmt.Errorf("target storage class not found")
}
return true, nil
}
func (p *Planner) validateSourcePVC(args *ChooseStrategyArgs, sourceClaim *corev1.PersistentVolumeClaim) error {
_, permissive := args.TargetClaim.Annotations[cc.AnnPermissiveClone]
if permissive {
args.Log.V(3).Info("permissive clone annotation found, skipping size validation")
return nil
}
if err := cc.ValidateRequestedCloneSize(sourceClaim.Spec.Resources, args.TargetClaim.Spec.Resources); err != nil {
p.Recorder.Eventf(args.TargetClaim, corev1.EventTypeWarning, cc.ErrIncompatiblePVC, err.Error())
return err
}
return nil
}
func (p *Planner) validateAdvancedClonePVC(ctx context.Context, args *ChooseStrategyArgs, res *ChooseStrategyResult, sourceClaim *corev1.PersistentVolumeClaim) error {
driver, err := GetCommonDriver(ctx, p.Client, sourceClaim, args.TargetClaim)
if err != nil {
return err
}
if driver == nil {
p.fallbackToHostAssisted(args.TargetClaim, res, IncompatibleProvisioners, MessageIncompatibleProvisioners)
args.Log.V(3).Info("CSIDrivers not compatible for advanced clone")
return nil
}
if !SameVolumeMode(sourceClaim, args.TargetClaim) {
p.fallbackToHostAssisted(args.TargetClaim, res, IncompatibleVolumeModes, MessageIncompatibleVolumeModes)
args.Log.V(3).Info("volume modes not compatible for advanced clone")
return nil
}
sc, err := GetStorageClassForClaim(ctx, p.Client, args.TargetClaim)
if err != nil {
return err
}
if sc == nil {
args.Log.V(3).Info("target storage class not found")
return fmt.Errorf("target storage class not found")
}
srcCapacity, hasSrcCapacity := sourceClaim.Status.Capacity[corev1.ResourceStorage]
targetRequest, hasTargetRequest := args.TargetClaim.Spec.Resources.Requests[corev1.ResourceStorage]
allowExpansion := sc.AllowVolumeExpansion != nil && *sc.AllowVolumeExpansion
if !hasSrcCapacity || !hasTargetRequest {
return fmt.Errorf("source/target size info missing")
}
if srcCapacity.Cmp(targetRequest) < 0 && !allowExpansion {
p.fallbackToHostAssisted(args.TargetClaim, res, NoVolumeExpansion, MessageNoVolumeExpansion)
args.Log.V(3).Info("advanced clone not possible, no volume expansion")
}
return nil
}
func (p *Planner) fallbackToHostAssisted(targetClaim *corev1.PersistentVolumeClaim, res *ChooseStrategyResult, reason, message string) {
res.Strategy = cdiv1.CloneStrategyHostAssisted
res.FallbackReason = &message
p.Recorder.Event(targetClaim, corev1.EventTypeWarning, reason, message)
}
func (p *Planner) planHostAssistedFromPVC(ctx context.Context, args *PlanArgs) ([]Phase, error) {
desiredClaim := createDesiredClaim(args.DataSource.Namespace, args.TargetClaim)
hcp := &HostClonePhase{
Owner: args.TargetClaim,
Namespace: args.DataSource.Namespace,
SourceName: args.DataSource.Spec.Source.Name,
DesiredClaim: desiredClaim,
ImmediateBind: true,
OwnershipLabel: p.OwnershipLabel,
Preallocation: cc.GetPreallocation(ctx, p.Client, args.DataSource.Spec.Preallocation),
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
if args.DataSource.Spec.PriorityClassName != nil {
hcp.PriorityClassName = *args.DataSource.Spec.PriorityClassName
}
rp := &RebindPhase{
SourceNamespace: desiredClaim.Namespace,
SourceName: desiredClaim.Name,
TargetNamespace: args.TargetClaim.Namespace,
TargetName: args.TargetClaim.Name,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
return []Phase{hcp, rp}, nil
}
func (p *Planner) planHostAssistedFromSnapshot(ctx context.Context, args *PlanArgs) ([]Phase, error) {
sourceSnapshot := &snapshotv1.VolumeSnapshot{}
exists, err := getResource(ctx, p.Client, args.DataSource.Namespace, args.DataSource.Spec.Source.Name, sourceSnapshot)
if err != nil {
return nil, err
}
if !exists {
return nil, fmt.Errorf("source claim does not exist")
}
sourceClaimForDumbClone, err := createTempSourceClaim(ctx, args.DataSource.Namespace, args.TargetClaim, sourceSnapshot, p.Client)
if err != nil {
return nil, err
}
cfsp := &SnapshotClonePhase{
Owner: args.TargetClaim,
Namespace: args.DataSource.Namespace,
SourceName: args.DataSource.Spec.Source.Name,
DesiredClaim: sourceClaimForDumbClone,
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
pcp := &PrepClaimPhase{
Owner: args.TargetClaim,
DesiredClaim: sourceClaimForDumbClone.DeepCopy(),
Image: p.Image,
PullPolicy: p.PullPolicy,
InstallerLabels: p.InstallerLabels,
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
desiredClaim := createDesiredClaim(args.DataSource.Namespace, args.TargetClaim)
hcp := &HostClonePhase{
Owner: args.TargetClaim,
Namespace: sourceClaimForDumbClone.Namespace,
SourceName: sourceClaimForDumbClone.Name,
DesiredClaim: desiredClaim,
ImmediateBind: true,
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
if args.DataSource.Spec.PriorityClassName != nil {
hcp.PriorityClassName = *args.DataSource.Spec.PriorityClassName
}
rp := &RebindPhase{
SourceNamespace: desiredClaim.Namespace,
SourceName: desiredClaim.Name,
TargetNamespace: args.TargetClaim.Namespace,
TargetName: args.TargetClaim.Name,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
return []Phase{cfsp, pcp, hcp, rp}, nil
}
func (p *Planner) planSmartCloneFromSnapshot(ctx context.Context, args *PlanArgs) ([]Phase, error) {
sourceSnapshot := &snapshotv1.VolumeSnapshot{}
exists, err := getResource(ctx, p.Client, args.DataSource.Namespace, args.DataSource.Spec.Source.Name, sourceSnapshot)
if err != nil {
return nil, err
}
if !exists {
return nil, fmt.Errorf("source claim does not exist")
}
desiredClaim := createDesiredClaim(args.DataSource.Namespace, args.TargetClaim)
cfsp := &SnapshotClonePhase{
Owner: args.TargetClaim,
Namespace: args.DataSource.Namespace,
SourceName: args.DataSource.Spec.Source.Name,
DesiredClaim: desiredClaim.DeepCopy(),
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
pcp := &PrepClaimPhase{
Owner: args.TargetClaim,
DesiredClaim: desiredClaim.DeepCopy(),
Image: p.Image,
PullPolicy: p.PullPolicy,
InstallerLabels: p.InstallerLabels,
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
rp := &RebindPhase{
SourceNamespace: desiredClaim.Namespace,
SourceName: desiredClaim.Name,
TargetNamespace: args.TargetClaim.Namespace,
TargetName: args.TargetClaim.Name,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
return []Phase{cfsp, pcp, rp}, nil
}
func (p *Planner) planSnapshotFromPVC(ctx context.Context, args *PlanArgs) ([]Phase, error) {
sourceClaim := &corev1.PersistentVolumeClaim{}
exists, err := getResource(ctx, p.Client, args.DataSource.Namespace, args.DataSource.Spec.Source.Name, sourceClaim)
if err != nil {
return nil, err
}
if !exists {
return nil, fmt.Errorf("source claim does not exist")
}
vsc, err := GetCompatibleVolumeSnapshotClass(ctx, p.Client, args.Log, p.Recorder, args.TargetClaim)
if err != nil {
return nil, err
}
if vsc == nil {
return nil, fmt.Errorf("no compatible volumesnapshotclass")
}
sp := &SnapshotPhase{
Owner: args.TargetClaim,
SourceNamespace: args.DataSource.Namespace,
SourceName: args.DataSource.Spec.Source.Name,
TargetName: fmt.Sprintf("tmp-snapshot-%s", string(args.TargetClaim.UID)),
VolumeSnapshotClass: *vsc,
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
desiredClaim := createDesiredClaim(args.DataSource.Namespace, args.TargetClaim)
cfsp := &SnapshotClonePhase{
Owner: args.TargetClaim,
Namespace: args.DataSource.Namespace,
SourceName: sp.TargetName,
DesiredClaim: desiredClaim.DeepCopy(),
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
pcp := &PrepClaimPhase{
Owner: args.TargetClaim,
DesiredClaim: desiredClaim.DeepCopy(),
Image: p.Image,
PullPolicy: p.PullPolicy,
InstallerLabels: p.InstallerLabels,
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
rp := &RebindPhase{
SourceNamespace: desiredClaim.Namespace,
SourceName: desiredClaim.Name,
TargetNamespace: args.TargetClaim.Namespace,
TargetName: args.TargetClaim.Name,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
return []Phase{sp, cfsp, pcp, rp}, nil
}
func (p *Planner) planCSIClone(ctx context.Context, args *PlanArgs) ([]Phase, error) {
desiredClaim := createDesiredClaim(args.DataSource.Namespace, args.TargetClaim)
cp := &CSIClonePhase{
Owner: args.TargetClaim,
Namespace: args.DataSource.Namespace,
SourceName: args.DataSource.Spec.Source.Name,
DesiredClaim: desiredClaim.DeepCopy(),
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
pcp := &PrepClaimPhase{
Owner: args.TargetClaim,
DesiredClaim: desiredClaim.DeepCopy(),
Image: p.Image,
PullPolicy: p.PullPolicy,
InstallerLabels: p.InstallerLabels,
OwnershipLabel: p.OwnershipLabel,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
rp := &RebindPhase{
SourceNamespace: desiredClaim.Namespace,
SourceName: desiredClaim.Name,
TargetNamespace: args.TargetClaim.Namespace,
TargetName: args.TargetClaim.Name,
Client: p.Client,
Log: args.Log,
Recorder: p.Recorder,
}
return []Phase{cp, pcp, rp}, nil
}
func createDesiredClaim(namespace string, targetClaim *corev1.PersistentVolumeClaim) *corev1.PersistentVolumeClaim {
targetCpy := targetClaim.DeepCopy()
desiredClaim := &corev1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: fmt.Sprintf("tmp-pvc-%s", string(targetClaim.UID)),
Labels: targetCpy.Labels,
Annotations: targetCpy.Annotations,
},
Spec: targetCpy.Spec,
}
desiredClaim.Spec.DataSource = nil
desiredClaim.Spec.DataSourceRef = nil
return desiredClaim
}
func createTempSourceClaim(ctx context.Context, namespace string, targetClaim *corev1.PersistentVolumeClaim, snapshot *snapshotv1.VolumeSnapshot, client client.Client) (*corev1.PersistentVolumeClaim, error) {
scName, err := getStorageClassNameForTempSourceClaim(ctx, snapshot, client)
if err != nil {
return nil, err
}
// Get the appropriate size from the snapshot
targetCpy := targetClaim.DeepCopy()
if snapshot.Status == nil || snapshot.Status.RestoreSize == nil || snapshot.Status.RestoreSize.Sign() == -1 {
return nil, fmt.Errorf("snapshot has no RestoreSize")
}
restoreSize := snapshot.Status.RestoreSize
if restoreSize.IsZero() {
reqSize := targetCpy.Spec.Resources.Requests[corev1.ResourceStorage]
restoreSize = &reqSize
}
desiredClaim := &corev1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: fmt.Sprintf("tmp-source-pvc-%s", string(targetClaim.UID)),
Labels: targetCpy.Labels,
Annotations: targetCpy.Annotations,
},
Spec: targetCpy.Spec,
}
desiredClaim.Spec.DataSource = nil
desiredClaim.Spec.DataSourceRef = nil
desiredClaim.Spec.StorageClassName = &scName
desiredClaim.Spec.Resources.Requests[corev1.ResourceStorage] = *restoreSize
return desiredClaim, nil
}
func getStorageClassNameForTempSourceClaim(ctx context.Context, snapshot *snapshotv1.VolumeSnapshot, client client.Client) (string, error) {
var matches []string
if snapshot.Status == nil || snapshot.Status.BoundVolumeSnapshotContentName == nil {
return "", fmt.Errorf("volumeSnapshotContent name not found")
}
volumeSnapshotContent := &snapshotv1.VolumeSnapshotContent{}
if err := client.Get(ctx, types.NamespacedName{Name: *snapshot.Status.BoundVolumeSnapshotContentName}, volumeSnapshotContent); err != nil {
return "", err
}
// Attempting to get a storageClass compatible with the source snapshot
storageClasses := &storagev1.StorageClassList{}
if err := client.List(ctx, storageClasses); err != nil {
return "", err
}
for _, storageClass := range storageClasses.Items {
if storageClass.Provisioner == volumeSnapshotContent.Spec.Driver {
matches = append(matches, storageClass.Name)
}
}
if len(matches) == 0 {
return "", fmt.Errorf("unable to find a valid storage class for the temporal source claim")
}
sort.Strings(matches)
return matches[0], nil
}