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compatibility.go
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compatibility.go
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//nolint:dupl,lll,gocyclo
package instancetype
import (
"fmt"
appsv1 "k8s.io/api/apps/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/json"
instancetypev1alpha1 "kubevirt.io/api/instancetype/v1alpha1"
instancetypev1alpha2 "kubevirt.io/api/instancetype/v1alpha2"
instancetypev1beta1 "kubevirt.io/api/instancetype/v1beta1"
generatedscheme "kubevirt.io/client-go/generated/kubevirt/clientset/versioned/scheme"
)
func getInstancetypeSpecFromControllerRevision(revision *appsv1.ControllerRevision) (*instancetypev1beta1.VirtualMachineInstancetypeSpec, error) {
if err := decodeControllerRevision(revision, false); err != nil {
return nil, err
}
switch obj := revision.Data.Object.(type) {
case *instancetypev1beta1.VirtualMachineInstancetype:
return &obj.Spec, nil
case *instancetypev1beta1.VirtualMachineClusterInstancetype:
return &obj.Spec, nil
default:
return nil, fmt.Errorf("unexpected type in ControllerRevision: %T", obj)
}
}
func getPreferenceSpecFromControllerRevision(revision *appsv1.ControllerRevision) (*instancetypev1beta1.VirtualMachinePreferenceSpec, error) {
if err := decodeControllerRevision(revision, true); err != nil {
return nil, err
}
switch obj := revision.Data.Object.(type) {
case *instancetypev1beta1.VirtualMachinePreference:
return &obj.Spec, nil
case *instancetypev1beta1.VirtualMachineClusterPreference:
return &obj.Spec, nil
default:
return nil, fmt.Errorf("unexpected type in ControllerRevision: %T", obj)
}
}
func decodeControllerRevision(revision *appsv1.ControllerRevision, isPreference bool) error {
if len(revision.Data.Raw) == 0 {
return nil
}
// Backward compatibility check. Try to decode ControllerRevision from v1alpha1 version.
oldObject, err := decodeSpecRevision(revision.Data.Raw, isPreference)
if err != nil {
return fmt.Errorf("failed to decode old ControllerRevision: %w", err)
}
if oldObject != nil {
revision.Data.Object = oldObject
return nil
}
return decodeControllerRevisionObject(revision)
}
func decodeControllerRevisionObject(revision *appsv1.ControllerRevision) error {
decodedObj, err := runtime.Decode(generatedscheme.Codecs.UniversalDeserializer(), revision.Data.Raw)
if err != nil {
return fmt.Errorf("failed to decode object in ControllerRevision: %w", err)
}
revision.Data.Object = decodedObj
switch obj := revision.Data.Object.(type) {
case *instancetypev1beta1.VirtualMachineInstancetype, *instancetypev1beta1.VirtualMachineClusterInstancetype, *instancetypev1beta1.VirtualMachinePreference, *instancetypev1beta1.VirtualMachineClusterPreference:
return nil
case *instancetypev1alpha2.VirtualMachineInstancetype:
dest := &instancetypev1beta1.VirtualMachineInstancetype{}
if err := instancetypev1alpha2.Convert_v1alpha2_VirtualMachineInstancetype_To_v1beta1_VirtualMachineInstancetype(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
case *instancetypev1alpha2.VirtualMachineClusterInstancetype:
dest := &instancetypev1beta1.VirtualMachineClusterInstancetype{}
if err := instancetypev1alpha2.Convert_v1alpha2_VirtualMachineClusterInstancetype_To_v1beta1_VirtualMachineClusterInstancetype(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
case *instancetypev1alpha2.VirtualMachinePreference:
dest := &instancetypev1beta1.VirtualMachinePreference{}
if err := instancetypev1alpha2.Convert_v1alpha2_VirtualMachinePreference_To_v1beta1_VirtualMachinePreference(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
case *instancetypev1alpha2.VirtualMachineClusterPreference:
dest := &instancetypev1beta1.VirtualMachineClusterPreference{}
if err := instancetypev1alpha2.Convert_v1alpha2_VirtualMachineClusterPreference_To_v1beta1_VirtualMachineClusterPreference(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
case *instancetypev1alpha1.VirtualMachineInstancetype:
dest := &instancetypev1beta1.VirtualMachineInstancetype{}
if err := instancetypev1alpha1.Convert_v1alpha1_VirtualMachineInstancetype_To_v1beta1_VirtualMachineInstancetype(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
case *instancetypev1alpha1.VirtualMachineClusterInstancetype:
dest := &instancetypev1beta1.VirtualMachineClusterInstancetype{}
if err := instancetypev1alpha1.Convert_v1alpha1_VirtualMachineClusterInstancetype_To_v1beta1_VirtualMachineClusterInstancetype(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
case *instancetypev1alpha1.VirtualMachinePreference:
dest := &instancetypev1beta1.VirtualMachinePreference{}
if err := instancetypev1alpha1.Convert_v1alpha1_VirtualMachinePreference_To_v1beta1_VirtualMachinePreference(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
case *instancetypev1alpha1.VirtualMachineClusterPreference:
dest := &instancetypev1beta1.VirtualMachineClusterPreference{}
if err := instancetypev1alpha1.Convert_v1alpha1_VirtualMachineClusterPreference_To_v1beta1_VirtualMachineClusterPreference(obj, dest, nil); err != nil {
return err
}
revision.Data.Object = dest
default:
return fmt.Errorf("unexpected type in ControllerRevision: %T", obj)
}
return nil
}
func decodeSpecRevision(data []byte, isPreference bool) (runtime.Object, error) {
if isPreference {
oldObject, err := decodeVirtualMachinePreferenceSpecRevision(data)
if err != nil {
return nil, fmt.Errorf("failed to decode VirtualMachinePreferenceSpecRevision: %w", err)
}
if oldObject == nil {
return nil, nil
}
newObject := &instancetypev1beta1.VirtualMachinePreference{}
if err := instancetypev1alpha1.Convert_v1alpha1_VirtualMachinePreference_To_v1beta1_VirtualMachinePreference(oldObject, newObject, nil); err != nil {
return nil, err
}
return newObject, nil
}
oldObject, err := decodeVirtualMachineInstancetypeSpecRevision(data)
if err != nil {
return nil, fmt.Errorf("failed to decode VirtualMachineInstancetypeSpecRevision: %w", err)
}
if oldObject == nil {
return nil, nil
}
newObject := &instancetypev1beta1.VirtualMachineInstancetype{}
if err := instancetypev1alpha1.Convert_v1alpha1_VirtualMachineInstancetype_To_v1beta1_VirtualMachineInstancetype(oldObject, newObject, nil); err != nil {
return nil, err
}
return newObject, nil
}
func decodeVirtualMachineInstancetypeSpecRevision(data []byte) (*instancetypev1alpha1.VirtualMachineInstancetype, error) {
revision := &instancetypev1alpha1.VirtualMachineInstancetypeSpecRevision{}
err := json.Unmarshal(data, revision)
if err != nil {
// Failed to unmarshal, so the object is not the expected type
return nil, nil
}
instancetypeSpec := &instancetypev1alpha1.VirtualMachineInstancetypeSpec{}
err = json.Unmarshal(revision.Spec, instancetypeSpec)
if err != nil {
return nil, fmt.Errorf("failed to unmarshal json into v1alpha1.VirtualMachineInstancetypeSpec: %w", err)
}
return &instancetypev1alpha1.VirtualMachineInstancetype{
TypeMeta: metav1.TypeMeta{
APIVersion: instancetypev1alpha1.SchemeGroupVersion.String(),
Kind: "VirtualMachineInstancetype",
},
ObjectMeta: metav1.ObjectMeta{
Name: "old-version-of-instancetype-object",
},
Spec: *instancetypeSpec,
}, nil
}
func decodeVirtualMachinePreferenceSpecRevision(data []byte) (*instancetypev1alpha1.VirtualMachinePreference, error) {
revision := &instancetypev1alpha1.VirtualMachinePreferenceSpecRevision{}
err := json.Unmarshal(data, revision)
if err != nil {
// Failed to unmarshall, so the object is not the expected type
return nil, nil
}
preferenceSpec := &instancetypev1alpha1.VirtualMachinePreferenceSpec{}
err = json.Unmarshal(revision.Spec, preferenceSpec)
if err != nil {
return nil, fmt.Errorf("failed to unmarshall json into v1alpha1.VirtualMachinePreferenceSpec: %w", err)
}
return &instancetypev1alpha1.VirtualMachinePreference{
TypeMeta: metav1.TypeMeta{
APIVersion: instancetypev1alpha1.SchemeGroupVersion.String(),
Kind: "VirtualMachinePreference",
},
ObjectMeta: metav1.ObjectMeta{
Name: "old-version-of-preference-object",
},
Spec: *preferenceSpec,
}, nil
}