dashes are evil, use underscore in var names

host_vars/mail.auro.re.yml

@@ -8,6 +8,6 @@ certbot:
 
 nfs:
   src: "10.128.0.6:/data_mail"  # caradoc
-  mount-path: /var/vmail
+  mount_path: "/var/vmail"
-  dir-owner: vmail
+  dir_owner: vmail
-  dir-group: vmail
+  dir_group: vmail

roles/nfs-client/tasks/main.yml

@@ -8,17 +8,17 @@
 
 - name: Create mountable dir
   file:
-    path: "{{ nfs.mount-path }}"
+    path: "{{ nfs.mount_path }}"
     state: directory
-    mode: 0644
+    mode: 0755
-    owner: "{{ nfs.dir-owner }}"
+    owner: "{{ nfs.dir_owner }}"
-    group: "{{ nfs.dir-group }}"
+    group: "{{ nfs.dir_group }}"
 
 - name: Mount and add to fstab
   mount:
     state: mounted  # actively mounted and configured in fstab
     src: "{{ nfs.src }}"
-    path: "{{ nfs.mount-path }}"
+    path: "{{ nfs.mount_path }}"
     fstype: nfs
     opts: defaults
 # don't specify dump and fsck to keep the 0 (don't) variable