On 12/11/2013 11:43 PM, Jay Lau wrote:
Greetings,
Here come a question related to heat auto scale down.
The scenario is as following:
I was trying to deploy hadoop cluster with heat Auto Scaling template.
When scale up a slave node, I can use user-data to do some post work
for configuration file on hadoop master node base on the information
of slave node (The mainly configuration file is conf/slaves as I need
to put slave node to this file);
But when scale down, seems I have no chance to do some configuration
for the master node (Remove the scale down node from conf/slaves) as
master node do not know which slave node was scale down.
Yes. There isn't a way to add a hook to do any sort of "post work" after
an instance is brought down. That is why AutoScalingGroup and
LoadBalancer resource usually come in pair, even though
LoadBalancerNames isn't a mandatory property. Internally
AutoScalingGroup triggers a load balancer reload each time it's resized,
but that doesn't happen to any other resources (like a customized
instance in your case). This might be something we can improve in the
future.
Does anyone has some experience on this?
Thanks,
Jay
_______________________________________________
OpenStack-dev mailing list
OpenStack-dev@lists.openstack.org
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
_______________________________________________
OpenStack-dev mailing list
OpenStack-dev@lists.openstack.org
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
