From the [doc](https://github.com/kubernetes-csi/csi-driver-host-path/blob/master/pkg/hostpath/README.md), when the server started the default `/tmp/csi.sock` file was created automatically. But after kill the server, the sock file was not removed accordingly. ``` ll /tmp srwxr-xr-x 1 dev dev 0 Oct 6 17:07 csi.sock ```
