optimized backups-cleanup

roles/native-backups-cleanup/templates/backups-cleanup.py.j2

@@ -0,0 +1,25 @@
+# @see https://stackoverflow.com/questions/48929553/get-hard-disk-size-in-python
+import psutil
+import shutil
+import os
+backup_disk_path = "{{backup_disk_path}}"
+backups_folder_path = os.path.join(backup_disk_path, "Backups/")
+deleted = True
+while psutil.disk_usage(backup_disk_path).percent > int({{backup_space_percent}}) and deleted:
+    deleted = False
+    print("%d %% of disk %s are used. Freeing space..." % (psutil.disk_usage(backup_disk_path).percent,backup_disk_path))
+    for primary_directory in os.listdir(backups_folder_path):
+        primary_directory = os.path.join(backups_folder_path, primary_directory)
+        for application_directory in os.listdir(primary_directory):
+            application_directory = os.path.join(primary_directory, application_directory)
+            diffs_directory = os.path.join(application_directory, "diffs/")
+            diffs = os.listdir(diffs_directory)
+            diffs.sort(reverse=False)
+            if len(diffs) >= 1:
+                delete_diff = diffs_directory + diffs[0]
+                print("Deleting %s..." % (delete_diff))
+                shutil.rmtree(delete_diff)
+                deleted = True
+if not deleted:
+    print("All diffs had been deleted!")
+print("Cleaning up finished: %d %% of disk %s are used." % (psutil.disk_usage(backup_disk_path).percent,backup_disk_path))