add logic to detect fuse-overlayfs support

Signed-off-by: cgruver <[email protected]>

Author: cgruver

base/ubi9/entrypoint.sh

@@ -5,11 +5,16 @@ if [ ! -d "${HOME}" ]; then
   mkdir -p "${HOME}"
 fi
 
-# Configure container builds to use vfs
+# Configure container builds to use vfs or fuse-overlayfs
 if [ ! -d "${HOME}/.config/containers" ]
 then
   mkdir -p ${HOME}/.config/containers
-  (echo '[storage]';echo 'driver = "vfs"') > "${HOME}"/.config/containers/storage.conf
+  if [ -c "/dev/fuse" ] && [ -f "/usr/bin/fuse-overlayfs" ]
+  then
+    (echo '[storage]';echo 'driver = "overlay"';echo '[storage.options.overlay]';echo 'mount_program = "/usr/bin/fuse-overlayfs"') > ${HOME}/.config/containers/storage.conf
+  else
+    (echo '[storage]';echo 'driver = "vfs"') > "${HOME}"/.config/containers/storage.conf
+  fi
 fi
 
 # Setup $PS1 for a consistent and reasonable prompt