On 02/10/13 16:06, Thomas Hervé wrote:
Hi all,
There is a small but important part of the autoscale design described in
https://wiki.openstack.org/wiki/Heat/AutoScaling that we'd like to
discuss to make sure everybody is on the same page. Namely, the
relationship between an autoscaling group and a load balancer.
In the current system, a group has references to load balancers, and
signals them when the group changes, sending it the list of servers in
the group. This creates an implicit interface between groups and load
balancers that we didn't model well, and is awkward for third-party load
balancers.
It strikes me that the autoscaling group is comprised of a list of
servers, and a loadbalancer's backend pool is comprised of a list of
server:port tuples. Why not make the mapping at that level?
I don't think there needs to be any additional verbosity in the template
- the mapping between an autoscaling group and a loadbalancer backend
pool could be handled internally.
Cheers,
--
Stephen Gran
Senior Systems Integrator - theguardian.com
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