mirror of
https://github.com/projectcapsule/capsule.git
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85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
/*
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Copyright 2020 Clastix Labs.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package tenant_prefix
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import (
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"context"
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"net/http"
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"strings"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/types"
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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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"github.com/clastix/capsule/api/v1alpha1"
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"github.com/clastix/capsule/pkg/webhook"
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)
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// +kubebuilder:webhook:path=/validating-v1-namespace-tenant-prefix,mutating=false,failurePolicy=fail,groups="",resources=namespaces,verbs=create,versions=v1,name=prefix.namespace.capsule.clastix.io
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type Webhook struct {
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ForceTenantPrefix bool
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}
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func (o Webhook) GetHandler() webhook.Handler {
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return &handler{forceTenantPrefix: o.ForceTenantPrefix}
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}
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func (o Webhook) GetName() string {
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return "OwnerReference"
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}
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func (o Webhook) GetPath() string {
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return "/validating-v1-namespace-tenant-prefix"
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}
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type handler struct {
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forceTenantPrefix bool
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}
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func (r *handler) OnCreate(ctx context.Context, req admission.Request, clt client.Client, decoder *admission.Decoder) admission.Response {
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if !r.forceTenantPrefix {
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return admission.Allowed("")
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}
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ns := &corev1.Namespace{}
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if err := decoder.Decode(req, ns); err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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t := &v1alpha1.Tenant{}
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for _, or := range ns.ObjectMeta.OwnerReferences {
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// retrieving the selected Tenant
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if err := clt.Get(ctx, types.NamespacedName{Name: or.Name}, t); err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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}
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if e := t.GetName() + "-" + ns.GetName(); !strings.HasPrefix(ns.GetName(), t.GetName()+"-") {
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return admission.Denied("The namespace doesn't match the tenant prefix, expected " + e)
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}
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return admission.Allowed("")
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}
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func (r *handler) OnDelete(ctx context.Context, req admission.Request, client client.Client, decoder *admission.Decoder) admission.Response {
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return admission.Allowed("")
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}
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func (r *handler) OnUpdate(ctx context.Context, req admission.Request, client client.Client, decoder *admission.Decoder) admission.Response {
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return admission.Allowed("")
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}
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