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strategy.go
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strategy.go
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// Copyright (c) 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package controllerdeployment
import (
"context"
"github.com/gardener/gardener/pkg/api"
"github.com/gardener/gardener/pkg/apis/core"
"github.com/gardener/gardener/pkg/apis/core/validation"
apiequality "k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/storage/names"
)
type controllerDeploymentStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// Strategy defines the storage strategy for ControllerDeployments.
var Strategy = controllerDeploymentStrategy{api.Scheme, names.SimpleNameGenerator}
func (controllerDeploymentStrategy) NamespaceScoped() bool {
return false
}
func (controllerDeploymentStrategy) PrepareForCreate(_ context.Context, obj runtime.Object) {
controllerDeployment := obj.(*core.ControllerDeployment)
controllerDeployment.Generation = 1
}
func (controllerDeploymentStrategy) PrepareForUpdate(_ context.Context, obj, old runtime.Object) {
newControllerDeployment := obj.(*core.ControllerDeployment)
oldControllerDeployment := old.(*core.ControllerDeployment)
if mustIncreaseGeneration(oldControllerDeployment, newControllerDeployment) {
newControllerDeployment.Generation = oldControllerDeployment.Generation + 1
}
}
func mustIncreaseGeneration(oldControllerDeployment, newControllerDeployment *core.ControllerDeployment) bool {
// The ControllerDeployment specification changes.
if !apiequality.Semantic.DeepEqual(oldControllerDeployment.ProviderConfig, newControllerDeployment.ProviderConfig) ||
!apiequality.Semantic.DeepEqual(oldControllerDeployment.Type, newControllerDeployment.Type) {
return true
}
// The deletion timestamp was set.
if oldControllerDeployment.DeletionTimestamp == nil && newControllerDeployment.DeletionTimestamp != nil {
return true
}
return false
}
func (controllerDeploymentStrategy) Validate(_ context.Context, obj runtime.Object) field.ErrorList {
controllerDeployment := obj.(*core.ControllerDeployment)
return validation.ValidateControllerDeployment(controllerDeployment)
}
func (controllerDeploymentStrategy) Canonicalize(_ runtime.Object) {
}
func (controllerDeploymentStrategy) AllowCreateOnUpdate() bool {
return false
}
func (controllerDeploymentStrategy) ValidateUpdate(_ context.Context, newObj, oldObj runtime.Object) field.ErrorList {
newControllerDeployment := newObj.(*core.ControllerDeployment)
oldControllerDeployment := oldObj.(*core.ControllerDeployment)
return validation.ValidateControllerDeploymentUpdate(newControllerDeployment, oldControllerDeployment)
}
func (controllerDeploymentStrategy) AllowUnconditionalUpdate() bool {
return false
}