mirror of
https://github.com/projectcapsule/capsule.git
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a4b0c0fe27
* Using HTTP handlers as closures * Avoiding variable shadowing * Optimizing Ingress webhook * Missing license header
76 lines
2.0 KiB
Go
76 lines
2.0 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 webhook
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import (
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"context"
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"io/ioutil"
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admissionv1beta1 "k8s.io/api/admission/v1beta1"
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controllerruntime "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/webhook"
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"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
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)
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func Register(mgr controllerruntime.Manager, webhookList ...Webhook) error {
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// skipping webhook setup if certificate is missing
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dat, _ := ioutil.ReadFile("/tmp/k8s-webhook-server/serving-certs/tls.crt")
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if len(dat) == 0 {
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return nil
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}
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s := mgr.GetWebhookServer()
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for _, wh := range webhookList {
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s.Register(wh.GetPath(), &webhook.Admission{
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Handler: &handlerRouter{
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handler: wh.GetHandler(),
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},
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})
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}
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return nil
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}
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type handlerRouter struct {
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handler Handler
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client client.Client
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decoder *admission.Decoder
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}
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func (r *handlerRouter) Handle(ctx context.Context, req admission.Request) admission.Response {
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switch req.Operation {
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case admissionv1beta1.Create:
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return r.handler.OnCreate(r.client, r.decoder)(ctx, req)
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case admissionv1beta1.Update:
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return r.handler.OnUpdate(r.client, r.decoder)(ctx, req)
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case admissionv1beta1.Delete:
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return r.handler.OnDelete(r.client, r.decoder)(ctx, req)
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default:
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return admission.Allowed("")
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}
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}
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func (r *handlerRouter) InjectClient(c client.Client) error {
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r.client = c
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return nil
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}
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func (r *handlerRouter) InjectDecoder(d *admission.Decoder) error {
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r.decoder = d
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return nil
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}
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