I see... both nodes seems to need gluster/server on them.

playbooks/groups/odcs.yml

@@ -79,7 +79,7 @@
   - include: "{{ handlers_path }}/restart_services.yml"
 
 - name: Set up a gluster share on the backend for the frontend
-  hosts: odcs-backend:odcs-backend-stg
+  hosts: odcs:odcs-stg
   user: root
   gather_facts: True
 
@@ -97,24 +97,28 @@
     group: root
     datadir: /srv/glusterfs/odcs-stg
 
-- name: Configure all odcs nodes to mount the gluster share.
-  hosts: odcs:odcs-stg
-  user: root
-  gather_facts: True
-
-  vars_files:
-   - /srv/web/infra/ansible/vars/global.yml
-   - "/srv/private/ansible/vars.yml"
-   - "{{ vars_path }}/{{ ansible_distribution }}.yml"
-
-  roles:
   - role: gluster/client
     name: gluster
     tags: gluster
     servers:
-    - "{{odcs_gluster_server}}"
+    - odcs-frontend01.stg.phx2.fedoraproject.org
+    - odcs-backend01.stg.phx2.fedoraproject.org
     username: "{{ odcs_gluster_username }}"
     password: "{{ odcs_gluster_password }}"
     owner: root
     group: root
     mountdir: /srv/odcs
+    when: env == 'staging'
+
+  - role: gluster/client
+    name: gluster
+    tags: gluster
+    servers:
+    - odcs-frontend01.phx2.fedoraproject.org
+    - odcs-backend01.phx2.fedoraproject.org
+    username: "{{ odcs_gluster_username }}"
+    password: "{{ odcs_gluster_password }}"
+    owner: root
+    group: root
+    mountdir: /srv/odcs
+    when: env != 'staging'