/
util.go
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/
util.go
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/*
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 daemonset
import (
"context"
"fmt"
"sync"
"k8s.io/apiserver/pkg/admission"
api "k8s.io/kubernetes/pkg/apis/core"
)
var _ admission.ValidationInterface = &fakePodFailAdmission{}
type fakePodFailAdmission struct {
lock sync.Mutex
limitedPodNumber int
succeedPodsCount int
}
func (f *fakePodFailAdmission) Handles(operation admission.Operation) bool {
return operation == admission.Create
}
func (f *fakePodFailAdmission) Validate(ctx context.Context, attr admission.Attributes, o admission.ObjectInterfaces) (err error) {
if attr.GetKind().GroupKind() != api.Kind("Pod") {
return nil
}
f.lock.Lock()
defer f.lock.Unlock()
if f.succeedPodsCount >= f.limitedPodNumber {
return fmt.Errorf("fakePodFailAdmission error")
}
f.succeedPodsCount++
return nil
}