Recreation swift client for each chunk during swift incremental restore

Closes-bug: 1563397

Change-Id: I1b14d6bd09e37c6ca22234141a5d88ccc0be305f
(cherry picked from commit 4b91ce6d4f)

freezer/arguments.py

@@ -451,7 +451,7 @@ def backup_arguments():
                 backup_args.path_to_backup[:3]
 
     # Freezer version
-    backup_args.__dict__['__version__'] = '1.2.18'
+    backup_args.__dict__['__version__'] = '1.2.19'
 
     # todo(enugaev) move it to new command line param backup_media
     backup_media = 'fs'

freezer/storage/swift.py

@@ -17,6 +17,7 @@ limitations under the License.
 
 import json
 import logging
+import requests.exceptions
 import time
 
 from freezer.storage import base
@@ -209,8 +210,17 @@ class SwiftStorage(base.Storage):
         :type backup: freezer.storage.base.Backup
         :return:
         """
-        for chunk in self.swift().get_object(
-                self.container, str(backup), resp_chunk_size=self.chunk_size)[1]:
+        try:
+            chunks = self.swift().get_object(
+                self.container, str(backup),
+                resp_chunk_size=self.chunk_size)[1]
+        except requests.exceptions.SSLError as e:
+            logging.warning(e)
+            chunks = self.client_manager.create_swift().get_object(
+                self.container, str(backup),
+                resp_chunk_size=self.chunk_size)[1]
+
+        for chunk in chunks:
             yield chunk
 
     def write_backup(self, rich_queue, backup):

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = freezer
-version = 1.2.18
+version = 1.2.19
 author = Freezer Team
 author-email = openstack-dev@lists.openstack.org
 summary = The OpenStack Backup Restore and Disaster Recovery as a Service Platform