[Kimchi-devel] [PATCH] Bug fix #309 - network: Unable to create vlan tagged on Ubuntu

[Ramon Medeiros]

Python binding for libvirt does not support conn.changeBegin() and
conn.commit(). To make the change safe, this procedure was changed to a
internal framework: RollbackContext.:wq!

Signed-off-by: Ramon Medeiros <ramonn at linux.vnet.ibm.com>
---
 src/kimchi/model.py | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/kimchi/model.py b/src/kimchi/model.py
index 81c1507..e36b485 100644
--- a/src/kimchi/model.py
+++ b/src/kimchi/model.py
@@ -951,16 +951,17 @@ class Model(object):
         br_xml = networkxml.create_vlan_tagged_bridge_xml(br_name, interface,
                                                           vlan_id)
         conn = self.conn.get()
-        conn.changeBegin()
-        try:
-            vlan_tagged_br = conn.interfaceDefineXML(br_xml)
-            vlan_tagged_br.create()
-        except libvirt.libvirtError as e:
-            conn.changeRollback()
-            raise OperationFailed(e.message)
-        else:
-            conn.changeCommit()
-            return br_name
+
+        with RollbackContext() as rollback:
+
+            try:
+                vlan_tagged_br = conn.interfaceDefineXML(br_xml)
+                vlan_tagged_br.create()
+            except libvirt.libvirtError as e:
+                rollback.prependDefer(vlan_tagged_br.destroy)
+                raise OperationFailed(e.message)
+            else:
+                return br_name
 
     def _remove_vlan_tagged_bridge(self, network):
         try:
-- 
1.8.3.1