Comment 1 for bug 1101981

I don't think we should add FnGetAtt to the AutoScalingGroup resource, since no output for FnGetAtt is specified for this resource by AWS:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html

We made the decision that, in general we would try to avoid polluting the AWS resources with properties and functionality not specified by AWS, and I don't think this scenario justifies deviation from that plan.

I think probably the best solution to this problem is to create a OS::Swift::Proxy resource, which would behave in a similar way to the AWS::ElasticLoadBalancing::LoadBalancer resource, in that it can be specified as an input to the AutoScalingGroup "LoadBalancerNames" property, then you could implement the required update-proxy-on-new-autoscaling-event functionality in the reload().

Doing it this way would just make the proxy a special type of load balancer, which seems to me a reasonable solution?

There is the question of whether we want to include potentially widely useful resources like this in heat, but for now you could create such a resource as a custom resource plugin (start by copying loadbalancer.py)

http://wiki.openstack.org/Heat/Plugins