diff options
Diffstat (limited to 'heat/engine/resources/loadbalancer.py')
| -rw-r--r-- | heat/engine/resources/loadbalancer.py | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/heat/engine/resources/loadbalancer.py b/heat/engine/resources/loadbalancer.py index be0658bb0..f265265ff 100644 --- a/heat/engine/resources/loadbalancer.py +++ b/heat/engine/resources/loadbalancer.py @@ -422,7 +422,7 @@ class LoadBalancer(stack_resource.StackResource): servers = [] n = 1 nova_cp = self.client_plugin('nova') - for i in instances: + for i in instances or []: ip = nova_cp.server_to_ipaddress(i) or '0.0.0.0' LOG.debug('haproxy server:%s' % ip) servers.append('%sserver server%d %s:%s %s' % (spaces, n, @@ -481,7 +481,17 @@ class LoadBalancer(stack_resource.StackResource): save it to the db. rely on the cfn-hup to reconfigure HAProxy ''' - if self.INSTANCES in prop_diff: + new_props = json_snippet.properties(self.properties_schema, + self.context) + + # Valid use cases are: + # - Membership controlled by members property in template + # - Empty members property in template; membership controlled by + # "updates" triggered from autoscaling group. + # Mixing the two will lead to undefined behaviour. + if (self.INSTANCES in prop_diff and + (self.properties[self.INSTANCES] is not None or + new_props[self.INSTANCES] is not None)): templ = self.get_parsed_template() cfg = self._haproxy_config(templ, prop_diff[self.INSTANCES]) |