56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
/*
|
|
Copyright 2022 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 cel
|
|
|
|
import (
|
|
"context"
|
|
|
|
"k8s.io/apiserver/pkg/admission"
|
|
)
|
|
|
|
type CELPolicyEvaluator interface {
|
|
Validate(ctx context.Context, a admission.Attributes, o admission.ObjectInterfaces) error
|
|
HasSynced() bool
|
|
}
|
|
|
|
// NewPluginInitializer creates a plugin initializer which dependency injects a
|
|
// singleton cel admission controller into the plugins which desire it
|
|
func NewPluginInitializer(validator CELPolicyEvaluator) *PluginInitializer {
|
|
return &PluginInitializer{validator: validator}
|
|
}
|
|
|
|
// WantsCELPolicyEvaluator gives the ability to have the shared
|
|
// CEL Admission Controller dependency injected at initialization-time.
|
|
type WantsCELPolicyEvaluator interface {
|
|
SetCELPolicyEvaluator(CELPolicyEvaluator)
|
|
}
|
|
|
|
// PluginInitializer is used for initialization of the webhook admission plugin.
|
|
type PluginInitializer struct {
|
|
validator CELPolicyEvaluator
|
|
}
|
|
|
|
var _ admission.PluginInitializer = &PluginInitializer{}
|
|
|
|
// Initialize checks the initialization interfaces implemented by each plugin
|
|
// and provide the appropriate initialization data
|
|
func (i *PluginInitializer) Initialize(plugin admission.Interface) {
|
|
if wants, ok := plugin.(WantsCELPolicyEvaluator); ok {
|
|
wants.SetCELPolicyEvaluator(i.validator)
|
|
}
|
|
}
|