From 6584df59145b948d56704a504b1bef2cf9ced8fc Mon Sep 17 00:00:00 2001
From: Florent BENOIT <fbenoit@redhat.com>
Date: Fri, 14 Sep 2018 10:39:30 +0200
Subject: [PATCH] if driver disable support of FSGroup, mounter will not
 process the volume ownership

---
 pkg/volume/flexvolume/driver-call.go | 2 ++
 pkg/volume/flexvolume/mounter.go     | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkg/volume/flexvolume/driver-call.go b/pkg/volume/flexvolume/driver-call.go
index 00d7efbbc1..bd5a5cdb4f 100644
--- a/pkg/volume/flexvolume/driver-call.go
+++ b/pkg/volume/flexvolume/driver-call.go
@@ -223,6 +223,7 @@ type DriverCapabilities struct {
 	Attach          bool `json:"attach"`
 	SELinuxRelabel  bool `json:"selinuxRelabel"`
 	SupportsMetrics bool `json:"supportsMetrics"`
+	FSGroup         bool `json:"fsGroup"`
 }
 
 func defaultCapabilities() *DriverCapabilities {
@@ -230,6 +231,7 @@ func defaultCapabilities() *DriverCapabilities {
 		Attach:          true,
 		SELinuxRelabel:  true,
 		SupportsMetrics: false,
+		FSGroup:         true,
 	}
 }
 
diff --git a/pkg/volume/flexvolume/mounter.go b/pkg/volume/flexvolume/mounter.go
index 4405d12add..8c246043cb 100644
--- a/pkg/volume/flexvolume/mounter.go
+++ b/pkg/volume/flexvolume/mounter.go
@@ -92,7 +92,9 @@ func (f *flexVolumeMounter) SetUpAt(dir string, fsGroup *int64) error {
 	}
 
 	if !f.readOnly {
-		volume.SetVolumeOwnership(f, fsGroup)
+		if f.plugin.capabilities.FSGroup {
+			volume.SetVolumeOwnership(f, fsGroup)
+		}
 	}
 
 	return nil