allow btrfs

diff --git a/launcher b/launcher
index 13b6ee1aa953623beff9a8f2ad0d46c58fce7896..520271914a9c10c4c1b4efbada0c48ee7ce4d875 100755 (executable)
--- a/launcher
+++ b/launcher
@@ -87,9 +87,9 @@ prereqs() {
     exit 1
   fi
 
-  # 2. running aufs 
-  test=`$docker_path info 2> /dev/null | grep 'Driver: aufs'`
-  if [[ "$test" =~ "aufs" ]] ; then : ; else
+  # 2. running aufs or btrfs
+  test=`$docker_path info 2> /dev/null | grep 'Driver: '`
+  if [[ "$test" =~ [aufs|btrfs] ]] ; then : ; else
     echo "Your Docker installation is not using the recommended AuFS (union filesystem) and may be unstable."
     echo "If you are unable to bootstrap / stop your image please report the issue at:"
     echo "https://meta.discourse.org/t/discourse-docker-installation-without-aufs/15639"