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strategy.go
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/
strategy.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package controllerinstallation
import (
"context"
"fmt"
apiequality "k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/registry/generic"
"k8s.io/apiserver/pkg/storage"
"k8s.io/apiserver/pkg/storage/names"
"github.com/gardener/gardener/pkg/api"
"github.com/gardener/gardener/pkg/apis/core"
"github.com/gardener/gardener/pkg/apis/core/validation"
)
type controllerInstallationStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// Strategy defines the storage strategy for ControllerInstallations.
var Strategy = controllerInstallationStrategy{api.Scheme, names.SimpleNameGenerator}
func (controllerInstallationStrategy) NamespaceScoped() bool {
return false
}
func (controllerInstallationStrategy) PrepareForCreate(_ context.Context, obj runtime.Object) {
controllerInstallation := obj.(*core.ControllerInstallation)
controllerInstallation.Generation = 1
controllerInstallation.Status = core.ControllerInstallationStatus{}
}
func (controllerInstallationStrategy) PrepareForUpdate(_ context.Context, obj, old runtime.Object) {
newControllerInstallation := obj.(*core.ControllerInstallation)
oldControllerInstallation := old.(*core.ControllerInstallation)
newControllerInstallation.Status = oldControllerInstallation.Status
if mustIncreaseGeneration(oldControllerInstallation, newControllerInstallation) {
newControllerInstallation.Generation = oldControllerInstallation.Generation + 1
}
}
func mustIncreaseGeneration(oldControllerInstallation, newControllerInstallation *core.ControllerInstallation) bool {
// The ControllerInstallation specification changes.
if !apiequality.Semantic.DeepEqual(oldControllerInstallation.Spec, newControllerInstallation.Spec) {
return true
}
// The deletion timestamp was set.
if oldControllerInstallation.DeletionTimestamp == nil && newControllerInstallation.DeletionTimestamp != nil {
return true
}
return false
}
func (controllerInstallationStrategy) Validate(_ context.Context, obj runtime.Object) field.ErrorList {
controllerInstallation := obj.(*core.ControllerInstallation)
return validation.ValidateControllerInstallation(controllerInstallation)
}
func (controllerInstallationStrategy) Canonicalize(_ runtime.Object) {
}
func (controllerInstallationStrategy) AllowCreateOnUpdate() bool {
return false
}
func (controllerInstallationStrategy) ValidateUpdate(_ context.Context, newObj, oldObj runtime.Object) field.ErrorList {
newControllerInstallation := newObj.(*core.ControllerInstallation)
oldControllerInstallation := oldObj.(*core.ControllerInstallation)
return validation.ValidateControllerInstallationUpdate(newControllerInstallation, oldControllerInstallation)
}
func (controllerInstallationStrategy) AllowUnconditionalUpdate() bool {
return false
}
// WarningsOnCreate returns warnings to the client performing a create.
func (controllerInstallationStrategy) WarningsOnCreate(_ context.Context, _ runtime.Object) []string {
return nil
}
// WarningsOnUpdate returns warnings to the client performing the update.
func (controllerInstallationStrategy) WarningsOnUpdate(_ context.Context, _, _ runtime.Object) []string {
return nil
}
type controllerInstallationStatusStrategy struct {
controllerInstallationStrategy
}
// StatusStrategy defines the storage strategy for the status subresource of ControllerInstallations.
var StatusStrategy = controllerInstallationStatusStrategy{Strategy}
func (controllerInstallationStatusStrategy) PrepareForUpdate(_ context.Context, obj, old runtime.Object) {
newControllerInstallation := obj.(*core.ControllerInstallation)
oldControllerInstallation := old.(*core.ControllerInstallation)
newControllerInstallation.Spec = oldControllerInstallation.Spec
}
func (controllerInstallationStatusStrategy) ValidateUpdate(_ context.Context, obj, old runtime.Object) field.ErrorList {
return validation.ValidateControllerInstallationStatusUpdate(obj.(*core.ControllerInstallation).Status, old.(*core.ControllerInstallation).Status)
}
// ToSelectableFields returns a field set that represents the object
func ToSelectableFields(controllerInstallation *core.ControllerInstallation) fields.Set {
// The purpose of allocation with a given number of elements is to reduce
// amount of allocations needed to create the fields.Set. If you add any
// field here or the number of object-meta related fields changes, this should
// be adjusted.
controllerInstallationSpecificFieldsSet := make(fields.Set, 3)
controllerInstallationSpecificFieldsSet[core.RegistrationRefName] = controllerInstallation.Spec.RegistrationRef.Name
controllerInstallationSpecificFieldsSet[core.SeedRefName] = controllerInstallation.Spec.SeedRef.Name
return generic.AddObjectMetaFieldsSet(controllerInstallationSpecificFieldsSet, &controllerInstallation.ObjectMeta, false)
}
// GetAttrs returns labels and fields of a given object for filtering purposes.
func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
controllerInstallation, ok := obj.(*core.ControllerInstallation)
if !ok {
return nil, nil, fmt.Errorf("not a ControllerInstallation")
}
return controllerInstallation.ObjectMeta.Labels, ToSelectableFields(controllerInstallation), nil
}
// MatchControllerInstallation returns a generic matcher for a given label and field selector.
func MatchControllerInstallation(label labels.Selector, field fields.Selector) storage.SelectionPredicate {
return storage.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: GetAttrs,
IndexFields: []string{core.SeedRefName, core.RegistrationRefName},
}
}
// SeedRefNameIndexFunc returns spec.seedRef.name of given ControllerInstallation.
func SeedRefNameIndexFunc(obj interface{}) ([]string, error) {
controllerInstallation, ok := obj.(*core.ControllerInstallation)
if !ok {
return nil, fmt.Errorf("expected *core.ControllerInstallation but got %T", obj)
}
return []string{controllerInstallation.Spec.SeedRef.Name}, nil
}
// RegistrationRefNameIndexFunc returns spec.registrationRef.name of given ControllerInstallation.
func RegistrationRefNameIndexFunc(obj interface{}) ([]string, error) {
controllerInstallation, ok := obj.(*core.ControllerInstallation)
if !ok {
return nil, fmt.Errorf("expected *core.ControllerInstallation but got %T", obj)
}
return []string{controllerInstallation.Spec.RegistrationRef.Name}, nil
}