I had tried Access-control#admin-privileges to use dashboard and it works. Then I tried Static Password File to login dashboard.

I added --basic-auth-file= to /etc/kubernetes/manifests/kube-apiserver.yaml, added --authentication-mode=basic to dashboard; then restarted kubelet.

The content of passowrd file is something like this:

admin123,admin,admin

When I login dashboard as admin/admin identity, there is no common information but a lot of error messages shown:

persistentvolumeclaims is forbidden: User "admin" cannot list persistentvolumeclaims in the namespace "default"
configmaps is forbidden: User "admin" cannot list configmaps in the namespace "default"
...

Seems the privilege of admin user was not enough, did I miss anything?