storage: remove redundant code and add doc

circle/storage/models.py

@@ -90,6 +90,10 @@ class DataStore(Model):
     @method_cache(30)
     def get_orphan_disks(self, timeout=15):
         """Disk image files without Disk object in the database.
+        Exclude cloud-xxxxxxxx.dump format images.
+
+        :param timeout: Seconds before TimeOut exception
+        :type timeout: int
         """
         queue_name = self.get_remote_queue_name('storage', "slow")
         files = set(storage_tasks.list_files.apply_async(
@@ -105,6 +109,9 @@ class DataStore(Model):
     @method_cache(30)
     def get_missing_disks(self, timeout=15):
         """Disk objects without disk image files.
+
+        :param timeout: Seconds before TimeOut exception
+        :type timeout: int
         """
         queue_name = self.get_remote_queue_name('storage', "slow")
         files = set(storage_tasks.list_files.apply_async(

circle/storage/tasks/periodic_tasks.py

@@ -61,15 +61,11 @@ def list_orphan_disks(timeout=15):
     Exclude cloud-xxxxxxxx.dump format images.
 
     :param timeout: Seconds before TimeOut exception
-    :type timeoit: int
+    :type timeout: int
     """
     import re
     for ds in DataStore.objects.all():
-        queue_name = ds.get_remote_queue_name('storage', "slow")
-        files = set(storage_tasks.list_files.apply_async(
-            args=[ds.path], queue=queue_name).get(timeout=timeout))
-        disks = set([disk.filename for disk in ds.disk_set.all()])
-        for i in files - disks:
+        for i in ds.get_orphan_disks(timeout=timeout):
             if not re.match('cloud-[0-9]*\.dump', i):
                 logging.warning("Orphan disk: %s" % i)
 
@@ -79,14 +75,9 @@ def list_missing_disks(timeout=15):
     """List Disk objects without disk image files.
 
     :param timeout: Seconds before TimeOut exception
-    :type timeoit: int
+    :type timeout: int
     """
     for ds in DataStore.objects.all():
-        queue_name = ds.get_remote_queue_name('storage', "slow")
-        files = set(storage_tasks.list_files.apply_async(
-            args=[ds.path], queue=queue_name).get(timeout=timeout))
-        disks = set([disk.filename for disk in
-                     ds.disk_set.filter(destroyed__isnull=True)])
-        for i in disks - files:
+        for i in ds.get_missing_disks(timeout=timeout):
             logging.critical("Image: %s is missing from %s datastore."
                              % (i, ds.path))