Allow created pool directory to be different than XML

Author: markgoddard

README.md

@@ -20,6 +20,10 @@ should be a dict containing the following items:
   deprecated and will be removed in a future release.
 - `capacity`  The capacity, in bytes, of the pool. (optional)
 - `path` The absolute path to the pool's backing directory.
+- `path`: The absolute path to the pool's backing directory, as configured in
+  the pool definition.
+- `host_path`: The absolute path to the pool's backing directory, that will be
+  created on the host. Optional, defaults to the same as `pool.path`.
 - `mode` The access mode of the pool. N.B.: This should be specified as an
   integer **without** a leading zero; for example: `mode: 755`. (only `dir`)
 - `owner` The owner of the pool. (only `dir`)

defaults/main.yml

@@ -6,7 +6,10 @@
 #       supported. 'lvm2' is supported as an alias for 'logical', but this
 #       alias is deprecated and will be removed in a future release.
 # capacity:  The capacity, in bytes, of the pool.
-# path: The absolute path to the pool's backing directory.
+# path: The absolute path to the pool's backing directory, as configured in the
+# pool definition.
+# host_path: The absolute path to the pool's backing directory, that will be
+# created on the host. Optional, defaults to the same as 'pool.path'.
 # mode: The access mode of the pool.
 # owner: The owner of the pool.
 # group: The group of the pool.

tasks/pools.yml

@@ -1,7 +1,7 @@
 ---
 - name: Ensure libvirt dir storage pool directories exist
   file:
-    path: "{{ item.path }}"
+    path: "{{ item.host_path | default(item.path) }}"
     owner: "{{ item.owner }}"
     group: "{{ item.group }}"
     mode: "{{ item.mode|int(base=8) }}"