Description of problem:
After upgrade sriov operator from 4.7 to 4.8

When deleting or new create one sriovnetworknodepolicy. Always met the error: 

Error from server (InternalError): error when creating "intel-netdevice.yaml": Internal error occurred: failed calling webhook "operator-webhook.sriovnetwork.openshift.io": the server rejected our request for an unknown reason

webhook pods logs:


0609 07:51:41.940086       1 start.go:75] handling request: {"kind":"AdmissionReview","apiVersion":"admission.k8s.io/v1beta1","request":{"uid":"46e50497-2985-46f9-8ef2-ef6c17835051","kind":{"group":"sriovnetwork.openshift.io","version":"v1","kind":"SriovNetworkNodePolicy"},"resource":{"group":"sriovnetwork.openshift.io","version":"v1","resource":"sriovnetworknodepolicies"},"requestKind":{"group":"sriovnetwork.openshift.io","version":"v1","kind":"SriovNetworkNodePolicy"},"requestResource":{"group":"sriovnetwork.openshift.io","version":"v1","resource":"sriovnetworknodepolicies"},"name":"mlx278-dpdk","namespace":"openshift-sriov-network-operator","operation":"CREATE","userInfo":{"username":"system:admin","groups":["system:masters","system:authenticated"]},"object":{"apiVersion":"sriovnetwork.openshift.io/v1","kind":"SriovNetworkNodePolicy","metadata":{"creationTimestamp":null,"managedFields":[{"apiVersion":"sriovnetwork.openshift.io/v1","fieldsType":"FieldsV1","fieldsV1":{"f:spec":{".":{},"f:isRdma":{},"f:mtu":{},"f:nicSelector":{".":{},"f:pfNames":{},"f:rootDevices":{},"f:vendor":{}},"f:nodeSelector":{".":{},"f:feature.node.kubernetes.io/sriov-capable":{}},"f:numVfs":{},"f:resourceName":{}}},"manager":"kubectl-create","operation":"Update","time":"2021-06-09T07:51:41Z"}],"name":"mlx278-dpdk","namespace":"openshift-sriov-network-operator"},"spec":{"isRdma":true,"mtu":1550,"nicSelector":{"pfNames":["ens3f1"],"rootDevices":["0000:5e:00.1"],"vendor":"15b3"},"nodeSelector":{"feature.node.kubernetes.io/sriov-capable":"true"},"numVfs":2,"resourceName":"mlx278dpdk"}},"oldObject":null,"dryRun":false,"options":{"kind":"CreateOptions","apiVersion":"meta.k8s.io/v1","fieldManager":"kubectl-create"}}}
E0609 07:51:41.940325       1 start.go:81] Request could not be decoded: no kind "AdmissionReview" is registered for version "admission.k8s.io/v1beta1" in scheme "github.com/k8snetworkplumbingwg/sriov-network-operator/pkg/webhook/scheme.go:14"
I0609 07:52:39.140624       1 start.go:181] watcher event: "/etc/tls/tls.crt": CHMOD
I0609 07:52:39.140677       1 start.go:185] modified file: /etc/tls/tls.crt


Version-Release number of selected component (if applicable):

sriov-network-operator.4.7.0-202106011747  --> 4.8.0-202106081938

How reproducible:


Steps to Reproduce:
1. launch 4.7 cluster and setup sriov operator
2.  Create one sriov policy to init the VF
3. upgrade cluster to 4.8 and upgrade sriov oprator to 4.8
4. After upgrade, try to delete the policy or create new one policy 

Actual results:


#oc create -f intel-netdevice.yaml 
Error from server (InternalError): error when creating "intel-netdevice.yaml": Internal error occurred: failed calling webhook "operator-webhook.sriovnetwork.openshift.io": the server rejected our request for an unknown reason

Expected results:

policy can be created or deleted

Additional info:

This issue can be workaround by disable webhook and enable it again.