/
webhook.go
147 lines (123 loc) · 4.83 KB
/
webhook.go
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package mutating
import (
"context"
"encoding/json"
"net/http"
"reflect"
admissionv1 "k8s.io/api/admission/v1beta1"
corev1 "k8s.io/api/core/v1"
"k8s.io/klog"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
"github.com/baidubce/baiducloud-cce-cni-driver/pkg/bce/cloud"
"github.com/baidubce/baiducloud-cce-cni-driver/pkg/config/types"
"github.com/baidubce/baiducloud-cce-cni-driver/pkg/generated/clientset/versioned"
crdinformers "github.com/baidubce/baiducloud-cce-cni-driver/pkg/generated/informers/externalversions"
networkinformer "github.com/baidubce/baiducloud-cce-cni-driver/pkg/generated/informers/externalversions/networking/v1alpha1"
"github.com/baidubce/baiducloud-cce-cni-driver/pkg/webhook/injector"
"github.com/spf13/pflag"
)
var (
// HandlerMap contains admission webhook handlers
HandlerMap = map[string]admission.Handler{
"mutating-pod-subnet-topology-spread": &MutatingPodHandler{},
}
enablePodSubnetTopologyWebhook = true
enablePodIPResourcesWebhook = true
enablePodTopologySchedulerWebhook = true
)
func RegisterPodMutatingWebhookFlags(pflags *pflag.FlagSet) {
pflags.BoolVar(&enablePodSubnetTopologyWebhook, "enable-pod-subnet-topology-webhook", enablePodSubnetTopologyWebhook, "add psts to pod annotation while create pod")
pflags.BoolVar(&enablePodIPResourcesWebhook, "enable-pod-ip-resources-webhook", enablePodIPResourcesWebhook, "add ip resources to pod requests and limits while create pod")
pflags.BoolVar(&enablePodTopologySchedulerWebhook, "enable-pod-topology-scheduler-webhook", enablePodTopologySchedulerWebhook, "add topology spread and node affinity to pod annotation while create pod")
}
type MutatingPodHandler struct {
crdClient versioned.Interface
subnetInformer networkinformer.SubnetInformer
pstsInformer networkinformer.PodSubnetTopologySpreadInformer
bceClient cloud.Interface
// Decoder decodes objects
Decoder *admission.Decoder
cniMode types.ContainerNetworkMode
}
// Handle handles admission requests.
func (h *MutatingPodHandler) Handle(ctx context.Context, req admission.Request) admission.Response {
obj := &corev1.Pod{}
if len(req.AdmissionRequest.SubResource) > 0 ||
(req.AdmissionRequest.Operation != admissionv1.Create && req.AdmissionRequest.Operation != admissionv1.Update) ||
req.AdmissionRequest.Resource.Resource != "pods" {
return admission.Allowed("")
}
err := h.Decoder.Decode(req, obj)
if err != nil {
return admission.Errored(http.StatusBadRequest, err)
}
klog.V(5).Infof("receive mutating %s pod (%s/%s)", req.Operation, obj.Namespace, obj.Name)
if obj.Namespace == "" {
obj.Namespace = req.Namespace
}
if obj.Annotations == nil {
obj.Annotations = map[string]string{}
}
if obj.Labels == nil {
obj.Labels = map[string]string{}
}
pod := obj.DeepCopy()
switch req.Operation {
case admissionv1.Create:
if !types.IsCCECNIModeBasedOnBCCSecondaryIP(h.cniMode) &&
!types.IsCCECNIModeBasedOnBBCSecondaryIP(h.cniMode) {
break
}
// psts should not add affinity to pod which use hostNetwork
if enablePodSubnetTopologyWebhook && !pod.Spec.HostNetwork {
psts, err := h.addRelatedPodSubnetTopologySpread(ctx, pod)
if err != nil {
return admission.Errored(500, err)
}
if enablePodTopologySchedulerWebhook {
if err = h.addPodTopologySpread(ctx, pod, psts); err != nil {
return admission.Errored(500, err)
}
}
}
if enablePodIPResourcesWebhook {
h.addIPResource2Pod(ctx, pod)
}
}
if reflect.DeepEqual(obj, pod) {
return admission.Allowed("")
}
klog.V(3).Infof("mutating %s pod (%s/%s) with psts success", req.Operation, obj.Namespace, obj.Name)
marshalled, err := json.Marshal(pod)
if err != nil {
return admission.Errored(http.StatusInternalServerError, err)
}
return admission.PatchResponseFromRaw(req.AdmissionRequest.Object.Raw, marshalled)
}
var _ admission.DecoderInjector = &MutatingPodHandler{}
// InjectDecoder injects the decoder into the PodCreateHandler
func (h *MutatingPodHandler) InjectDecoder(d *admission.Decoder) error {
h.Decoder = d
return nil
}
var _ injector.CRDClient = &MutatingPodHandler{}
func (h *MutatingPodHandler) InjectCRDClient(crdClient versioned.Interface) error {
h.crdClient = crdClient
return nil
}
var _ injector.CloudClientInject = &MutatingPodHandler{}
func (h *MutatingPodHandler) InjectCloudClient(bceClient cloud.Interface) error {
h.bceClient = bceClient
return nil
}
var _ injector.NetworkInformerInject = &MutatingPodHandler{}
func (h *MutatingPodHandler) InjectNetworkInformer(networkInformer crdinformers.SharedInformerFactory) error {
h.subnetInformer = networkInformer.Cce().V1alpha1().Subnets()
h.pstsInformer = networkInformer.Cce().V1alpha1().PodSubnetTopologySpreads()
return nil
}
var _ injector.CNIModeInject = &MutatingPodHandler{}
func (h *MutatingPodHandler) InjectCNIMode(cniMode types.ContainerNetworkMode) error {
h.cniMode = cniMode
return nil
}