mirror of
https://github.com/projectcapsule/capsule.git
synced 2026-02-14 18:09:58 +00:00
121 lines
3.6 KiB
Go
121 lines
3.6 KiB
Go
/*
|
|
Copyright 2020 Clastix Labs.
|
|
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 owner_reference
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"github.com/clastix/capsule/pkg/webhook/utils"
|
|
"net/http"
|
|
|
|
corev1 "k8s.io/api/core/v1"
|
|
"k8s.io/apimachinery/pkg/fields"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"sigs.k8s.io/controller-runtime/pkg/client"
|
|
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
|
|
"sigs.k8s.io/controller-runtime/pkg/manager"
|
|
"sigs.k8s.io/controller-runtime/pkg/webhook"
|
|
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
|
|
|
|
"github.com/clastix/capsule/pkg/apis/capsule/v1alpha1"
|
|
)
|
|
|
|
func Add(mgr manager.Manager) error {
|
|
mgr.GetWebhookServer()
|
|
mgr.GetWebhookServer().Register("/mutate-v1-namespace-owner-reference", &webhook.Admission{
|
|
Handler: &ownerRef{
|
|
schema: mgr.GetScheme(),
|
|
},
|
|
})
|
|
return nil
|
|
}
|
|
|
|
type ownerRef struct {
|
|
client client.Client
|
|
decoder *admission.Decoder
|
|
// injecting the runtime.Scheme for controllerutil.SetOwnerReference
|
|
schema *runtime.Scheme
|
|
}
|
|
|
|
func (r *ownerRef) Handle(ctx context.Context, req admission.Request) admission.Response {
|
|
// Decoding the NS
|
|
ns := &corev1.Namespace{}
|
|
if err := r.decoder.Decode(req, ns); err != nil {
|
|
return admission.Errored(http.StatusBadRequest, err)
|
|
}
|
|
|
|
|
|
g := utils.UserGroupList(req.UserInfo.Groups)
|
|
if !g.IsInCapsuleGroup() {
|
|
// user requested NS creation is not a Capsule user, so skipping the validation checks
|
|
return admission.Allowed("")
|
|
}
|
|
|
|
if len(ns.ObjectMeta.Labels) > 0 {
|
|
ln, err := v1alpha1.GetTypeLabel(&v1alpha1.Tenant{})
|
|
if err != nil {
|
|
return admission.Errored(http.StatusBadRequest, err)
|
|
}
|
|
l, ok := ns.ObjectMeta.Labels[ln]
|
|
// assigning namespace to Tenant in case of label
|
|
if ok {
|
|
// retrieving the selected Tenant
|
|
t := &v1alpha1.Tenant{}
|
|
if err := r.client.Get(ctx, types.NamespacedName{Name: l}, t); err != nil {
|
|
return admission.Errored(http.StatusBadRequest, err)
|
|
}
|
|
// Tenant owner must adhere to user that asked for NS creation
|
|
if t.Spec.Owner != req.UserInfo.Username {
|
|
return admission.Denied("Cannot assign the desired namespace to a non-owned Tenant")
|
|
}
|
|
// Patching the response
|
|
return r.patchResponseForOwnerRef(t, ns)
|
|
}
|
|
|
|
}
|
|
|
|
tl := &v1alpha1.TenantList{}
|
|
if err := r.client.List(ctx, tl, client.MatchingFieldsSelector{
|
|
Selector: fields.OneTermEqualSelector(".spec.owner", req.UserInfo.Username),
|
|
}); err != nil {
|
|
return admission.Errored(http.StatusBadRequest, err)
|
|
}
|
|
|
|
if len(tl.Items) > 0 {
|
|
return r.patchResponseForOwnerRef(&tl.Items[0], ns)
|
|
}
|
|
|
|
return admission.Denied("You do not have any Tenant assigned: please, reach out the system administrators")
|
|
}
|
|
|
|
func (r *ownerRef) patchResponseForOwnerRef(tenant *v1alpha1.Tenant, ns *corev1.Namespace) admission.Response {
|
|
o, _ := json.Marshal(ns.DeepCopy())
|
|
if err := controllerutil.SetControllerReference(tenant, ns, r.schema); err != nil {
|
|
return admission.Errored(http.StatusInternalServerError, err)
|
|
}
|
|
c, _ := json.Marshal(ns)
|
|
return admission.PatchResponseFromRaw(o, c)
|
|
}
|
|
|
|
func (r *ownerRef) InjectDecoder(d *admission.Decoder) error {
|
|
r.decoder = d
|
|
return nil
|
|
}
|
|
|
|
func (r *ownerRef) InjectClient(c client.Client) error {
|
|
r.client = c
|
|
return nil
|
|
}
|