mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-04 20:20:19 +00:00
5af3fe5deb
this commits add the controller runtime and its dependency to the vendor. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
105 lines
3.2 KiB
Go
105 lines
3.2 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes Authors.
|
|
|
|
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 admission
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"net/http"
|
|
|
|
"k8s.io/api/admission/v1beta1"
|
|
admissionv1beta1 "k8s.io/api/admission/v1beta1"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/serializer"
|
|
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
|
|
)
|
|
|
|
var admissionScheme = runtime.NewScheme()
|
|
var admissionCodecs = serializer.NewCodecFactory(admissionScheme)
|
|
|
|
func init() {
|
|
utilruntime.Must(admissionv1beta1.AddToScheme(admissionScheme))
|
|
}
|
|
|
|
var _ http.Handler = &Webhook{}
|
|
|
|
func (wh *Webhook) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
var body []byte
|
|
var err error
|
|
|
|
var reviewResponse Response
|
|
if r.Body != nil {
|
|
if body, err = ioutil.ReadAll(r.Body); err != nil {
|
|
wh.log.Error(err, "unable to read the body from the incoming request")
|
|
reviewResponse = Errored(http.StatusBadRequest, err)
|
|
wh.writeResponse(w, reviewResponse)
|
|
return
|
|
}
|
|
} else {
|
|
err = errors.New("request body is empty")
|
|
wh.log.Error(err, "bad request")
|
|
reviewResponse = Errored(http.StatusBadRequest, err)
|
|
wh.writeResponse(w, reviewResponse)
|
|
return
|
|
}
|
|
|
|
// verify the content type is accurate
|
|
contentType := r.Header.Get("Content-Type")
|
|
if contentType != "application/json" {
|
|
err = fmt.Errorf("contentType=%s, expected application/json", contentType)
|
|
wh.log.Error(err, "unable to process a request with an unknown content type", "content type", contentType)
|
|
reviewResponse = Errored(http.StatusBadRequest, err)
|
|
wh.writeResponse(w, reviewResponse)
|
|
return
|
|
}
|
|
|
|
req := Request{}
|
|
ar := v1beta1.AdmissionReview{
|
|
// avoid an extra copy
|
|
Request: &req.AdmissionRequest,
|
|
}
|
|
if _, _, err := admissionCodecs.UniversalDeserializer().Decode(body, nil, &ar); err != nil {
|
|
wh.log.Error(err, "unable to decode the request")
|
|
reviewResponse = Errored(http.StatusBadRequest, err)
|
|
wh.writeResponse(w, reviewResponse)
|
|
return
|
|
}
|
|
wh.log.V(1).Info("received request", "UID", req.UID, "kind", req.Kind, "resource", req.Resource)
|
|
|
|
// TODO: add panic-recovery for Handle
|
|
reviewResponse = wh.Handle(r.Context(), req)
|
|
wh.writeResponse(w, reviewResponse)
|
|
}
|
|
|
|
func (wh *Webhook) writeResponse(w io.Writer, response Response) {
|
|
encoder := json.NewEncoder(w)
|
|
responseAdmissionReview := v1beta1.AdmissionReview{
|
|
Response: &response.AdmissionResponse,
|
|
}
|
|
err := encoder.Encode(responseAdmissionReview)
|
|
if err != nil {
|
|
wh.log.Error(err, "unable to encode the response")
|
|
wh.writeResponse(w, Errored(http.StatusInternalServerError, err))
|
|
} else {
|
|
res := responseAdmissionReview.Response
|
|
wh.log.V(1).Info("wrote response", "UID", res.UID, "allowed", res.Allowed, "result", res.Result)
|
|
}
|
|
}
|