Add an 'enable_lvm' configuration variable for volumes

roles/volumemgr/defaults/main.yml

+---
+
+# Whether to create volumes as LVs.
+enable_lvm: false
+

roles/volumemgr/tasks/volume.yml

@@ -20,12 +20,14 @@
     lv: "{{ lv_name }}"
     size: "{{ volume.size | default('10g') }}"
     shrink: false
+  when: enable_lvm
 
 - name: "Create a filesystem on {{ lv_name }}"
   filesystem:
     dev: "{{ lv_dev }}"
     fstype: ext4
   register: lv_mkfs
+  when: enable_lvm
 
 - name: "Add the /etc/fstab entry for {{ lv_name }}"
   mount:
@@ -34,6 +36,7 @@
     opts: "rw,noatime{% if volume.mount_opts is defined %},{{ volume.mount_opts }}{% endif %}"
     fstype: ext4
     state: mounted
+  when: enable_lvm
 
 # Set permissions again if we have created the filesystem.
 - name: "Fix permissions for {{ volume.path }}"