There is something wonky in the ansible directory logic here.

roles/gluster/client/tasks/main.yml

@@ -15,14 +15,10 @@
   #notify:
   #- remount?  no idea...
 
-- name: check if the mountdir directory already exists
-  file: path={{mountdir}} state=directory
-  register: result
-
 - name: mount it up
   mount: >
     src=/etc/glusterfs/glusterfs.{{name}}.vol
     state=mounted 
     fstype=glusterfs
     name={{mountdir}}
-  when: result|changed
+  ignore_errors: True