[OpenStack-Infra] Spot instances for CI

Jeremy Stanley fungi at yuggoth.org
Thu Dec 17 22:41:27 UTC 2015


On 2015-12-17 14:27:45 -0800 (-0800), James E. Blair wrote:
[...]
> While I think this approach could work, it doesn't feel like a
> natural fit for me. Our tests and therefore instances are actually
> rather short-lived. Rather than using a system where, at 57
> minutes into a 60 minute job, the instance is deleted and we need
> to restart the work, it would be more ideal to simply let that job
> complete, let the instance be naturally deleted, and not replace
> it. In other words, a smoother system for us that may achieve
> similar results more efficiently would be one that simply adjusted
> our quota dynamically.

I completely agree that given a choice between the two, a graceful
adjustment (perhaps with guarantees on the Nova side so the provider
can confirm deletion of oldest instances at some time window after
the quota drop) would be preferable over something that just deletes
random instances and hides the effective lower quota we end up at.
-- 
Jeremy Stanley



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