Unable to get klog.V(x) logs from k8s.io/mount-utils even cli flag --v=5 is set.

[yizha]

/kind bug

What happened?
Unable to get klog.V(x) logs from k8s.io/mount-utils even cli flag --v=5 is set.

What you expected to happen?
After setting --v=5 logs we should be able to see all V(x) logs from k8s.io/mount-utils.

How to reproduce it (as minimally and precisely as possible)?

1. Modify the ebs-csi-node daemonset, for the ebs-plugin container change/add cli flag --v=5, wait until all ebs-csi-node pods are restarted.
2. Restart a deployment (or statefulset) which mounting an ebs volume through the csi driver.
3. Find the ebs-csi-node pod on the same node of the pod from previous step, check its ebs-plugin container logs, cannot find any V(x) logs from k8s.io/mount-utils.

Anything else we need to know?:
In cmd/options.go, it is initialized with klog but k8s.io/mount-utils uses klog/v2, I am not an expect but doesn't that mean klog/v2 is not initialized and the level is the default value (0) even cli flag --v=5 is set?

Environment

• Kubernetes version (use kubectl version): v1.20
• Driver version: v1.9.0