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strategy.go
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strategy.go
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// Copyright (c) 2021 Tigera, Inc. All rights reserved.
//
// 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 kubecontrollersconfig
import (
"context"
"fmt"
"reflect"
"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"
apivalidation "k8s.io/kubernetes/pkg/apis/core/validation"
calico "github.com/projectcalico/api/pkg/apis/projectcalico/v3"
)
type apiServerStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// NewStrategy returns a new NamespaceScopedStrategy for instances
func NewStrategy(typer runtime.ObjectTyper) apiServerStrategy {
return apiServerStrategy{typer, names.SimpleNameGenerator}
}
func (apiServerStrategy) NamespaceScoped() bool {
return false
}
// PrepareForCreate clears the Status
func (apiServerStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
kubeControllersConfig := obj.(*calico.KubeControllersConfiguration)
kubeControllersConfig.Status = calico.KubeControllersConfigurationStatus{}
}
// PrepareForUpdate copies the Status from old to obj
func (apiServerStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newKubeControllersConfiguration := obj.(*calico.KubeControllersConfiguration)
oldKubeControllersConfiguration := old.(*calico.KubeControllersConfiguration)
newKubeControllersConfiguration.Status = oldKubeControllersConfiguration.Status
}
func (apiServerStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
return field.ErrorList{}
}
func (apiServerStrategy) AllowCreateOnUpdate() bool {
return false
}
func (apiServerStrategy) AllowUnconditionalUpdate() bool {
return false
}
func (apiServerStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
return []string{}
}
func (apiServerStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
return []string{}
}
func (apiServerStrategy) Canonicalize(obj runtime.Object) {
}
func (apiServerStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
return ValidateUpdate(obj.(*calico.KubeControllersConfiguration), old.(*calico.KubeControllersConfiguration))
}
type apiServerStatusStrategy struct {
apiServerStrategy
}
func NewStatusStrategy(strategy apiServerStrategy) apiServerStatusStrategy {
return apiServerStatusStrategy{strategy}
}
func (apiServerStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newKubeControllersConfiguration := obj.(*calico.KubeControllersConfiguration)
oldKubeControllersConfiguration := old.(*calico.KubeControllersConfiguration)
newKubeControllersConfiguration.Spec = oldKubeControllersConfiguration.Spec
newKubeControllersConfiguration.Labels = oldKubeControllersConfiguration.Labels
}
// ValidateUpdate is the default update validation for an end user updating status
func (apiServerStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
return ValidateUpdate(obj.(*calico.KubeControllersConfiguration), old.(*calico.KubeControllersConfiguration))
}
func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
apiserver, ok := obj.(*calico.KubeControllersConfiguration)
if !ok {
return nil, nil, fmt.Errorf("given object (type %v) is not a Kube Controllers Configuration", reflect.TypeOf(obj))
}
return labels.Set(apiserver.ObjectMeta.Labels), ToSelectableFields(apiserver), nil
}
// Match is the filter used by the generic etcd backend to watch events
// from etcd to clients of the apiserver only interested in specific labels/fields.
func Match(label labels.Selector, field fields.Selector) storage.SelectionPredicate {
return storage.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: GetAttrs,
}
}
// ToSelectableFields returns a field set that represents the object.
func ToSelectableFields(obj *calico.KubeControllersConfiguration) fields.Set {
return generic.ObjectMetaFieldsSet(&obj.ObjectMeta, false)
}
func ValidateUpdate(update, old *calico.KubeControllersConfiguration) field.ErrorList {
return apivalidation.ValidateObjectMetaUpdate(&update.ObjectMeta, &old.ObjectMeta, field.NewPath("metadata"))
}