don't write compute-init share into fstab for reliability -is unmounted once synced

Author: sjpb

ansible/roles/compute_init/files/compute-init.yml

@@ -64,12 +64,12 @@
         mode: u=rX,g=rwX,o=
 
     - name: Mount /mnt/cluster
-      mount:
+      ansible.posix.mount:
         path: /mnt/cluster
         src: "{{ server_node_ip }}:/exports/cluster"
         fstype: nfs
         opts: ro,sync
-        state: mounted
+        state: ephemeral # will be unmounted after sync, don't want it in fstab
       register: _mount_mnt_cluster
       ignore_errors: true
       # exits from playbook if this failed below, allowing ansible-init to