mirror of https://github.com/k3s-io/k3s
67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors 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 admission
|
|
|
|
import (
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
|
|
)
|
|
|
|
// chainAdmissionHandler is an instance of admission.Interface that performs admission control using a chain of admission handlers
|
|
type chainAdmissionHandler []Interface
|
|
|
|
// NewFromPlugins returns an admission.Interface that will enforce admission control decisions of all
|
|
// the given plugins.
|
|
func NewFromPlugins(client client.Interface, pluginNames []string, configFilePath string) Interface {
|
|
plugins := []Interface{}
|
|
for _, pluginName := range pluginNames {
|
|
plugin := InitPlugin(pluginName, client, configFilePath)
|
|
if plugin != nil {
|
|
plugins = append(plugins, plugin)
|
|
}
|
|
}
|
|
return chainAdmissionHandler(plugins)
|
|
}
|
|
|
|
// NewChainHandler creates a new chain handler from an array of handlers. Used for testing.
|
|
func NewChainHandler(handlers ...Interface) Interface {
|
|
return chainAdmissionHandler(handlers)
|
|
}
|
|
|
|
// Admit performs an admission control check using a chain of handlers, and returns immediately on first error
|
|
func (admissionHandler chainAdmissionHandler) Admit(a Attributes) error {
|
|
for _, handler := range admissionHandler {
|
|
if !handler.Handles(a.GetOperation()) {
|
|
continue
|
|
}
|
|
err := handler.Admit(a)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Handles will return true if any of the handlers handles the given operation
|
|
func (admissionHandler chainAdmissionHandler) Handles(operation Operation) bool {
|
|
for _, handler := range admissionHandler {
|
|
if handler.Handles(operation) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|