mirror of
https://github.com/projectcapsule/capsule.git
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79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
// Copyright 2020-2021 Clastix Labs
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// SPDX-License-Identifier: Apache-2.0
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package pod
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import (
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"context"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/client-go/tools/record"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
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capsulev1beta1 "github.com/clastix/capsule/api/v1beta1"
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capsulewebhook "github.com/clastix/capsule/pkg/webhook"
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"github.com/clastix/capsule/pkg/webhook/utils"
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)
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type priorityClass struct{}
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func PriorityClass() capsulewebhook.Handler {
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return &priorityClass{}
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}
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func (h *priorityClass) OnCreate(c client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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pod := &corev1.Pod{}
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if err := decoder.Decode(req, pod); err != nil {
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return utils.ErroredResponse(err)
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}
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tntList := &capsulev1beta1.TenantList{}
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if err := c.List(ctx, tntList, client.MatchingFieldsSelector{
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Selector: fields.OneTermEqualSelector(".status.namespaces", pod.Namespace),
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}); err != nil {
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return utils.ErroredResponse(err)
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}
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if len(tntList.Items) == 0 {
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return nil
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}
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allowed := tntList.Items[0].Spec.PriorityClasses
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priorityClassName := pod.Spec.PriorityClassName
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switch {
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case allowed == nil:
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// Enforcement is not in place, skipping it at all
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return nil
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case len(priorityClassName) == 0:
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// We don't have to force Pod to specify a Priority Class
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return nil
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case !allowed.ExactMatch(priorityClassName) && !allowed.RegexMatch(priorityClassName):
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recorder.Eventf(&tntList.Items[0], corev1.EventTypeWarning, "ForbiddenPriorityClass", "Pod %s/%s is using Priority Class %s is forbidden for the current Tenant", pod.Namespace, pod.Name, priorityClassName)
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response := admission.Denied(NewPodPriorityClassForbidden(priorityClassName, *allowed).Error())
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return &response
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default:
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return nil
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}
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}
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}
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func (h *priorityClass) OnDelete(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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return nil
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}
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}
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func (h *priorityClass) OnUpdate(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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return nil
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}
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}
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