custom-kube-scheduler/kubernetes/test/e2e/testing-manifests/storage-csi/hostpath

A partial copy of https://github.com/kubernetes-csi/docs/tree/master/book/src/example, with some modifications:

• serviceAccountName is used instead of the deprecated serviceAccount
• the RBAC roles from driver-registrar, external-attacher, external-provisioner and external-snapshotter are used