From b649d4f1f69f82ad232ec342f9ae52f5e88d415e Mon Sep 17 00:00:00 2001
From: Kenjiro Nakayama <nakayamakenjiro@gmail.com>
Date: Tue, 31 Jul 2018 14:41:14 +0900
Subject: [PATCH] Add nonempty option to ceph-fuse to support ReadWriteMany

fuse mount does not allow to mount directory if it contains some
files. Due to this, currently scaled pod with cephfs failed to mount
by ceph-fuse.

This patch adds nonempty option to ceph-fuse command to support
ReadWriteMany with ceph-fuse.
---
 pkg/cephfs/volumemounter.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkg/cephfs/volumemounter.go b/pkg/cephfs/volumemounter.go
index 368d8359d..055690371 100644
--- a/pkg/cephfs/volumemounter.go
+++ b/pkg/cephfs/volumemounter.go
@@ -40,6 +40,7 @@ func mountFuse(mountPoint string, cr *credentials, volOptions *volumeOptions, vo
 		"-n", cephEntityClientPrefix + cr.id,
 		"--keyring", getCephKeyringPath(volUuid, cr.id),
 		"-r", volOptions.RootPath,
+		"-o", "nonempty",
 	}
 
 	out, err := execCommand("ceph-fuse", args[:]...)