Resource limits / affinity for the builder pods

[Cryptophobia]

From @miracle2k on July 19, 2017 0:13

• In https://deis.com/docs/workflow/managing-workflow/tuning-component-settings/#setting-resource-limits it says I can use BUILDER_POD_NODE_SELECTOR to target specific nodes. How do I actually provide this environment variable. Can I set this through helm/values.yaml?

• As far as I can tell, if I want a host that is exclusively responsible as a builder, I need to taint the node and assign tolerations to the builder pods; this is not supported yet though, or is it?

• The limits_cpu and limits_memory settings I can apply to the "builder component"; but that is distinct from the builder pods, right? Is there a way to resource limit them.

I am asking this because I have had repeated trouble with the builders taking down other containers, I can only assume due to resource usage. My nodes are, admittedly, not the most powerful ones.

Copied from original issue: deis/workflow#840