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handler.go
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/
handler.go
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// Copyright (c) 2022 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 podschedulername
import (
"context"
"fmt"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
)
// Handler handles admission requests and sets the spec.schedulerName field in Pod resources.
type Handler struct {
SchedulerName string
}
// Default defaults the scheduler name of the provided pod.
func (h *Handler) Default(_ context.Context, obj runtime.Object) error {
pod, ok := obj.(*corev1.Pod)
if !ok {
return fmt.Errorf("expected *corev1.Pod but got %T", obj)
}
// Only overwrite the scheduler name when no custom scheduler name is specified
if pod.Spec.SchedulerName == "" || pod.Spec.SchedulerName == corev1.DefaultSchedulerName {
pod.Spec.SchedulerName = h.SchedulerName
}
return nil
}