Append mount options from K8S to the mount command options flag value.

driver/mounter.go

@@ -14,15 +14,13 @@ func Mount(source, target, fsType string, opts []string) error {
 	cmd := "mount"
 	var options []string
 	options = append(options, "-o")
-	if len(opts) > 0 {
-		options = append(options, strings.Join(opts, ","))
-	}
-	options = append(options, "bind")
+	opts = append(opts, "bind")
+	options = append(options, strings.Join(opts, ","))
 	options = append(options, source)
 	options = append(options, target)
 	glog.Infof("Executing mount command '%s %s'", cmd, strings.Join(options, " "))
 	if out, err := exec.Command(cmd, options...).CombinedOutput(); err != nil {
-		return fmt.Errorf("failed mount: %v cmd: '%s %s' command output: %q", err, cmd, target, string(out))
+		return fmt.Errorf("failed mount: %v cmd: '%s %s %s' command output: %q", err, cmd, options, target, string(out))
 	}
 	return nil
 }