mirror of
https://github.com/projectcapsule/capsule.git
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98 lines
2.7 KiB
Go
98 lines
2.7 KiB
Go
// Copyright 2020-2023 Project Capsule Authors.
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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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"net/http"
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corev1 "k8s.io/api/core/v1"
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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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capsulewebhook "github.com/projectcapsule/capsule/pkg/webhook"
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"github.com/projectcapsule/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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tnt, err := utils.TenantByStatusNamespace(ctx, c, pod.Namespace)
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if err != nil {
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return utils.ErroredResponse(err)
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}
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if tnt == nil {
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return nil
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}
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allowed := tnt.Spec.PriorityClasses
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if allowed == nil {
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return nil
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}
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priorityClassName := pod.Spec.PriorityClassName
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if 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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}
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selector := false
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// Verify if the StorageClass exists and matches the label selector/expression
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if len(allowed.MatchExpressions) > 0 || len(allowed.MatchLabels) > 0 {
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priorityClassObj, err := utils.GetPriorityClassByName(ctx, c, priorityClassName)
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if err != nil {
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response := admission.Errored(http.StatusInternalServerError, err)
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return &response
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}
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// Storage Class is present, check if it matches the selector
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if priorityClassObj != nil {
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selector = allowed.SelectorMatch(priorityClassObj)
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}
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}
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switch {
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case allowed.MatchDefault(priorityClassName):
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// Allow if given Priority Class is equal tenant default (eventough it's not allowed by selector)
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return nil
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case allowed.Match(priorityClassName) || selector:
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return nil
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default:
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recorder.Eventf(tnt, 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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}
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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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