security_group_manager = SecurityGroup(self.driver)
for instance in instances:
# deleate this instance's security groups
- for security_group in instance.metadata.get('security_groups', []):
+ security_group = instance.metadata.get('security_groups', '')
+ if security_group:
# dont delete the default security group
if security_group != 'default':
security_group_manager.delete_security_group(security_group)