for-aws
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docker-archive
Use spot instances
Expected behavior
It would be very nice to launch a spotfleet in place of autoscaling group for node (worker) nodes or, even better, make this choice configurable by the user. This will make AWS EC2 price more cheaper than using only on-demand instances.
Actual behavior
Today isn't possible to launch spot instances to be used in worker nodes.
This isn't something we can support right now, we will need to wait until we convert to using infrakit, once we do that, it will be possible.
Is it technically not possible to work with spot instances, or can the cloudformation template be manually customized to achieve it? If yes, does anyone have any guidance or code samples on how to do it? tx
@Eoan242 I'm not 100% sure, but I believe it is possible, you would just need to customize the template to support the spot instances.
Thanks for that. I'm pretty new to all of this so "just need to customize the template" is at this point not within my powers... but with the help of some examples/tutorials I might be able to figure it out.
FYI: Autospotting is a github project which addresses this requirement generically. https://github.com/cristim/autospotting It automatically brings up spot-bid instances which are compatible to the ones in your Docker for AWS Auto Scaling Groups; then yanks your on-demand swarm nodes out of the ASG one at a time, each time putting a spot equivalent in place. Have just been testing on my worker ASG and it seems to work quite well :)
Is there a timeline for when Docker for AWS will be converted to use InfraKit? I'm also very interested in launching worker nodes with spot instances, or even mixing them with on-demand instances.
@kinghuang please checkout Infrakit's repo, for a spot-instance example: https://github.com/docker/infrakit/blob/master/examples/playbooks/aws/provision-spot-instance.yml
