MountVolume.SetUp failed for volume "" : invalid character '/' looking for beginning of value

Describe the bug

I followed the tutorial given in the readme of this project to set up my local dev environment. But the pod is not getting started. Below is the error from kubectl describe pod.

Warning FailedMount 11m (x6 over 27m) kubelet Unable to attach or mount volumes: unmounted volumes=[azkvvolume], unattached volumes=[azkvvolume default-token-bkfjq]: timed out waiting for the condition Warning FailedMount 44s (x23 over 31m) kubelet MountVolume.SetUp failed for volume "azkvvolume" : invalid character '/' looking for beginning of value

One change I did apart from the tutorial is to change the hostPath volume of flex vol installer script as mentioned in #182 . I did this as I am running on Docker Desktop with K8s enabled.

Below is my yml volumeMounts:

name: azkvvolume mountPath: /kvmnt readOnly: true volumes:
- name: azkvvolume flexVolume: driver: "azure/kv" secretRef: name: kvcreds options: tenantid: "" subscriptionid: "" resourcegroup: usepodidentity: "false" usevmmanagedidentity: "false" keyvaultname: "" keyvaultobjectnames: "" keyvaultobjecttypes: secret

Steps To Reproduce

Follow the steps mentioned
Follow the #182
usepodidentity: "false"

Expected behavior

The pod should run and get the Azure KV secrets to be mounted as files

Key Vault FlexVolume version

As per the kv-flexvol-installer.yml , mcr.microsoft.com/k8s/flexvolume/keyvault-flexvolume:v0.0.17

Access mode: service principal or pod identity

service-principal

Kubernetes version

Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.2", GitCommit:"092fbfbf53427de67cac1e9fa54aaa09a28371d7", GitTreeState:"clean", BuildDate:"2021-06-16T12:59:11Z", GoVersion:"go1.16.5", Compiler:"gc", Platform:"windows/amd64"} Server Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.7", GitCommit:"1dd5338295409edcfff11505e7bb246f0d325d15", GitTreeState:"clean", BuildDate:"2021-01-13T13:15:20Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}

Environment

Docker Desktop on WSL2 backend
Windows 10 Enterprise
ASP.Net 5
Linux containers

Additional context

Most of the issues here are talking about a log file located on the host machine at the below path

/var/log/kv-driver.log

Unfortunately, I am not able to locate that file in Docker Desktop running on WSL2. I tried to search using the WSL2 command but had no luck. This file may be having more details to save me.

I work for an enterprise and the latest CSI KeyVault driver is not yet approved there.

Azure / kubernetes-keyvault-flexvol

MountVolume.SetUp failed for volume "" : invalid character '/' looking for beginning of value #198