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fix(controller): copy ownerreference from oldNs on namespace UPDATE admission requests

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Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com>
This commit is contained in:
Oliver Bähler
2023-09-15 18:44:20 +02:00
committed by Dario Tranchitella
parent 2baf604511
commit cde44ba14e
3 changed files with 34 additions and 70 deletions
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68
pkg/webhook/namespace/owner_reference.go
View File

@@ -1,68 +0,0 @@
// Copyright 2020-2023 Project Capsule Authors.
// SPDX-License-Identifier: Apache-2.0
package namespace
import (
"context"
"fmt"
"net/http"
corev1 "k8s.io/api/core/v1"
"k8s.io/client-go/tools/record"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
capsulewebhook "github.com/projectcapsule/capsule/pkg/webhook"
"github.com/projectcapsule/capsule/pkg/webhook/utils"
)
type ownerReferenceHandler struct{}
func OwnerReferenceHandler() capsulewebhook.Handler {
return &ownerReferenceHandler{}
}
func (r *ownerReferenceHandler) OnCreate(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func {
return func(ctx context.Context, req admission.Request) *admission.Response {
return nil
}
}
func (r *ownerReferenceHandler) OnDelete(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func {
return func(ctx context.Context, req admission.Request) *admission.Response {
return nil
}
}
func (r *ownerReferenceHandler) OnUpdate(_ client.Client, decoder *admission.Decoder, _ record.EventRecorder) capsulewebhook.Func {
return func(ctx context.Context, req admission.Request) *admission.Response {
oldNs := &corev1.Namespace{}
if err := decoder.DecodeRaw(req.OldObject, oldNs); err != nil {
return utils.ErroredResponse(err)
}
if len(oldNs.OwnerReferences) == 0 {
return nil
}
newNs := &corev1.Namespace{}
if err := decoder.Decode(req, newNs); err != nil {
return utils.ErroredResponse(err)
}
if len(newNs.OwnerReferences) == 0 {
response := admission.Errored(http.StatusBadRequest, fmt.Errorf("the OwnerReference cannot be removed"))
return &response
}
if oldNs.GetOwnerReferences()[0].UID != newNs.GetOwnerReferences()[0].UID {
response := admission.Errored(http.StatusBadRequest, fmt.Errorf("the OwnerReference cannot be changed"))
return &response
}
return nil
}
}

34
pkg/webhook/ownerreference/patching.go
View File

@@ -50,7 +50,39 @@ func (h *handler) OnDelete(client client.Client, decoder *admission.Decoder, rec
func (h *handler) OnUpdate(client client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
return func(ctx context.Context, req admission.Request) *admission.Response {
return nil
oldNs := &corev1.Namespace{}
if err := decoder.DecodeRaw(req.OldObject, oldNs); err != nil {
return utils.ErroredResponse(err)
}
if len(oldNs.OwnerReferences) == 0 {
return nil
}
newNs := &corev1.Namespace{}
if err := decoder.Decode(req, newNs); err != nil {
return utils.ErroredResponse(err)
}
o, err := json.Marshal(newNs.DeepCopy())
if err != nil {
response := admission.Errored(http.StatusInternalServerError, err)
return &response
}
newNs.OwnerReferences = oldNs.OwnerReferences
c, err := json.Marshal(newNs)
if err != nil {
response := admission.Errored(http.StatusInternalServerError, err)
return &response
}
response := admission.PatchResponseFromRaw(o, c)
return &response
}
}