From 3287ca1e45f74a2eac214070ccb937c7c7030a06 Mon Sep 17 00:00:00 2001
From: Vincent Batts <vbatts@hashbangbash.com>
Date: Tue, 18 Nov 2014 15:07:48 -0500
Subject: [PATCH] overlayfs: more helpful output when not supported

based on https://github.com/docker/docker/pull/7619#discussion_r20385086

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
---
 daemon/graphdriver/overlayfs/overlayfs.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/daemon/graphdriver/overlayfs/overlayfs.go b/daemon/graphdriver/overlayfs/overlayfs.go
index f2f478dc4a..a9ce75a375 100644
--- a/daemon/graphdriver/overlayfs/overlayfs.go
+++ b/daemon/graphdriver/overlayfs/overlayfs.go
@@ -129,6 +129,7 @@ func supportsOverlayfs() error {
 			return nil
 		}
 	}
+	log.Error("'overlayfs' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlayfs support loaded.")
 	return graphdriver.ErrNotSupported
 }