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/
pod_disruption_budget.go
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/
pod_disruption_budget.go
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// Copyright 2019 Cruise LLC
//
// 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
// https://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 resource
import (
"context"
admissionv1 "k8s.io/api/admission/v1"
policyv1beta1 "k8s.io/api/policy/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// PodDisruptionBudgetResource contains the information needed for processing by a Policy
type PodDisruptionBudgetResource struct {
PodDisruptionBudget policyv1beta1.PodDisruptionBudget
ResourceName string
ResourceKind string
}
// GetPodDisruptionBudgetResource extracts an PodDisruptionBudgetResource from an AdmissionRequest
func GetPodDisruptionBudgetResource(ctx context.Context, ar *admissionv1.AdmissionRequest) *PodDisruptionBudgetResource {
c := GetResourceCache(ctx)
return c.getOrSet(cacheKeyPodDisruptionBudget, func() interface{} {
return decodePodDisruptionBudgetResource(ar)
}).(*PodDisruptionBudgetResource)
}
func decodePodDisruptionBudgetResource(ar *admissionv1.AdmissionRequest) *PodDisruptionBudgetResource {
switch ar.Resource {
case metav1.GroupVersionResource{Group: "policy", Version: "v1beta1", Resource: "poddisruptionbudgets"}:
pdb := policyv1beta1.PodDisruptionBudget{}
if err := decodeObject(ar.Object.Raw, &pdb); err != nil {
return nil
}
return &PodDisruptionBudgetResource{
PodDisruptionBudget: pdb,
ResourceName: GetResourceName(pdb.ObjectMeta),
ResourceKind: "PodDisruptionBudget",
}
default:
return nil
}
}