185 lines
7.3 KiB
Go
185 lines
7.3 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
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 networkpolicy
|
|
|
|
import (
|
|
"context"
|
|
"reflect"
|
|
|
|
"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
|
|
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/util/validation/field"
|
|
"k8s.io/apiserver/pkg/storage/names"
|
|
utilfeature "k8s.io/apiserver/pkg/util/feature"
|
|
"k8s.io/kubernetes/pkg/api/legacyscheme"
|
|
"k8s.io/kubernetes/pkg/apis/networking"
|
|
"k8s.io/kubernetes/pkg/apis/networking/validation"
|
|
"k8s.io/kubernetes/pkg/features"
|
|
)
|
|
|
|
// networkPolicyStrategy implements verification logic for NetworkPolicies
|
|
type networkPolicyStrategy struct {
|
|
runtime.ObjectTyper
|
|
names.NameGenerator
|
|
}
|
|
|
|
// Strategy is the default logic that applies when creating and updating NetworkPolicy objects.
|
|
var Strategy = networkPolicyStrategy{legacyscheme.Scheme, names.SimpleNameGenerator}
|
|
|
|
// NamespaceScoped returns true because all NetworkPolicies need to be within a namespace.
|
|
func (networkPolicyStrategy) NamespaceScoped() bool {
|
|
return true
|
|
}
|
|
|
|
// GetResetFields returns the set of fields that get reset by the strategy
|
|
// and should not be modified by the user.
|
|
func (networkPolicyStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
|
|
fields := map[fieldpath.APIVersion]*fieldpath.Set{
|
|
"extensions/v1beta1": fieldpath.NewSet(
|
|
fieldpath.MakePathOrDie("status"),
|
|
),
|
|
"networking.k8s.io/v1": fieldpath.NewSet(
|
|
fieldpath.MakePathOrDie("status"),
|
|
),
|
|
}
|
|
return fields
|
|
}
|
|
|
|
// PrepareForCreate clears the status of a NetworkPolicy before creation.
|
|
func (networkPolicyStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
|
|
networkPolicy := obj.(*networking.NetworkPolicy)
|
|
|
|
if utilfeature.DefaultFeatureGate.Enabled(features.NetworkPolicyStatus) {
|
|
// Create does not set a status when operation is not directed to status subresource
|
|
networkPolicy.Status = networking.NetworkPolicyStatus{}
|
|
}
|
|
|
|
networkPolicy.Generation = 1
|
|
|
|
}
|
|
|
|
// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
|
|
func (networkPolicyStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
|
|
newNetworkPolicy := obj.(*networking.NetworkPolicy)
|
|
oldNetworkPolicy := old.(*networking.NetworkPolicy)
|
|
|
|
// We copy the status if the FG is enabled, or if previously there was already data on the conditions field
|
|
// As soon as the FeatureGate is removed, the whole if statement should be removed as well
|
|
if utilfeature.DefaultFeatureGate.Enabled(features.NetworkPolicyStatus) || len(oldNetworkPolicy.Status.Conditions) > 0 {
|
|
// Update is not allowed to set status when the operation is not directed to status subresource
|
|
newNetworkPolicy.Status = oldNetworkPolicy.Status
|
|
}
|
|
|
|
// Any changes to the spec increment the generation number, any changes to the
|
|
// status should reflect the generation number of the corresponding object.
|
|
// See metav1.ObjectMeta description for more information on Generation.
|
|
if !reflect.DeepEqual(oldNetworkPolicy.Spec, newNetworkPolicy.Spec) {
|
|
newNetworkPolicy.Generation = oldNetworkPolicy.Generation + 1
|
|
}
|
|
}
|
|
|
|
// Validate validates a new NetworkPolicy.
|
|
func (networkPolicyStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
|
|
networkPolicy := obj.(*networking.NetworkPolicy)
|
|
ops := validation.ValidationOptionsForNetworking(networkPolicy, nil)
|
|
return validation.ValidateNetworkPolicy(networkPolicy, ops)
|
|
}
|
|
|
|
// WarningsOnCreate returns warnings for the creation of the given object.
|
|
func (networkPolicyStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
|
|
return nil
|
|
}
|
|
|
|
// Canonicalize normalizes the object after validation.
|
|
func (networkPolicyStrategy) Canonicalize(obj runtime.Object) {}
|
|
|
|
// AllowCreateOnUpdate is false for NetworkPolicy; this means POST is needed to create one.
|
|
func (networkPolicyStrategy) AllowCreateOnUpdate() bool {
|
|
return false
|
|
}
|
|
|
|
// ValidateUpdate is the default update validation for an end user.
|
|
func (networkPolicyStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
|
|
opts := validation.ValidationOptionsForNetworking(obj.(*networking.NetworkPolicy), old.(*networking.NetworkPolicy))
|
|
validationErrorList := validation.ValidateNetworkPolicy(obj.(*networking.NetworkPolicy), opts)
|
|
updateErrorList := validation.ValidateNetworkPolicyUpdate(obj.(*networking.NetworkPolicy), old.(*networking.NetworkPolicy), opts)
|
|
return append(validationErrorList, updateErrorList...)
|
|
}
|
|
|
|
// WarningsOnUpdate returns warnings for the given update.
|
|
func (networkPolicyStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
|
|
return nil
|
|
}
|
|
|
|
// AllowUnconditionalUpdate is the default update policy for NetworkPolicy objects.
|
|
func (networkPolicyStrategy) AllowUnconditionalUpdate() bool {
|
|
return true
|
|
}
|
|
|
|
type networkPolicyStatusStrategy struct {
|
|
networkPolicyStrategy
|
|
}
|
|
|
|
// StatusStrategy implements logic used to validate and prepare for updates of the status subresource
|
|
var StatusStrategy = networkPolicyStatusStrategy{Strategy}
|
|
|
|
// GetResetFields returns the set of fields that get reset by the strategy
|
|
// and should not be modified by the user.
|
|
func (networkPolicyStatusStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
|
|
fields := map[fieldpath.APIVersion]*fieldpath.Set{
|
|
"extensions/v1beta1": fieldpath.NewSet(
|
|
fieldpath.MakePathOrDie("spec"),
|
|
),
|
|
"networking.k8s.io/v1": fieldpath.NewSet(
|
|
fieldpath.MakePathOrDie("spec"),
|
|
),
|
|
}
|
|
return fields
|
|
}
|
|
|
|
// PrepareForUpdate clears fields that are not allowed to be set by end users on update of status
|
|
func (networkPolicyStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
|
|
newNetworkPolicy := obj.(*networking.NetworkPolicy)
|
|
oldNetworkPolicy := old.(*networking.NetworkPolicy)
|
|
// status changes are not allowed to update spec
|
|
newNetworkPolicy.Spec = oldNetworkPolicy.Spec
|
|
|
|
if !utilfeature.DefaultFeatureGate.Enabled(features.NetworkPolicyStatus) {
|
|
// As network policy status is composed only of an array of conditions, we can say that the status
|
|
// is in use if the condition array is bigger than 0.
|
|
// quoting @thockin: "we generally keep data in this case, but no updates except to clear it"
|
|
if len(newNetworkPolicy.Status.Conditions) == 0 {
|
|
newNetworkPolicy.Status = networking.NetworkPolicyStatus{}
|
|
} else {
|
|
// keep the old status in case of the update is not to clear it
|
|
newNetworkPolicy.Status = oldNetworkPolicy.Status
|
|
}
|
|
}
|
|
}
|
|
|
|
// ValidateUpdate is the default update validation for an end user updating status
|
|
func (networkPolicyStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
|
|
return validation.ValidateNetworkPolicyStatusUpdate(obj.(*networking.NetworkPolicy).Status,
|
|
old.(*networking.NetworkPolicy).Status, field.NewPath("status"))
|
|
}
|
|
|
|
// WarningsOnUpdate returns warnings for the given update.
|
|
func (networkPolicyStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
|
|
return nil
|
|
}
|