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package admissioncontroller
import (
"net/http"
"strings"
admissionv1 "k8s.io/api/admission/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog/v2"
devicesv1beta1 "github.com/kubeedge/api/apis/devices/v1beta1"
)
func admitDevice(review admissionv1.AdmissionReview) *admissionv1.AdmissionResponse {
reviewResponse := admissionv1.AdmissionResponse{}
reviewResponse.Allowed = true
var msg string
switch review.Request.Operation {
case admissionv1.Create, admissionv1.Update:
raw := review.Request.Object.Raw
device := devicesv1beta1.Device{}
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(raw, nil, &device); err != nil {
klog.Errorf("validation failed with error: %v", err)
return toAdmissionResponse(err)
}
msg = validateDevice(&device, &reviewResponse)
case admissionv1.Delete, admissionv1.Connect:
//no rule defined for above operations, greenlight for all of above.
reviewResponse.Allowed = true
default:
klog.Infof("Unsupported webhook operation %v", review.Request.Operation)
reviewResponse.Allowed = false
msg = "Unsupported webhook operation!"
}
if !reviewResponse.Allowed {
reviewResponse.Result = &metav1.Status{Message: strings.TrimSpace(msg)}
}
return &reviewResponse
}
func validateDevice(device *devicesv1beta1.Device, response *admissionv1.AdmissionResponse) string {
//device properties name must be unique.
var msg string
size := len(device.Spec.Properties)
for i := range device.Spec.Properties {
for j := i + 1; j < size; j++ {
if device.Spec.Properties[i].Name == device.Spec.Properties[j].Name {
msg = "property names must be unique."
response.Allowed = false
return msg
}
}
}
return msg
}
func serveDevice(w http.ResponseWriter, r *http.Request) {
serve(w, r, admitDevice)
}
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