amazon web services - Does ELB connection draining apply when spot instances are terminated? -


a new aws elb feature, connection draining, announced.

http://aws.amazon.com/about-aws/whats-new/2014/03/20/elastic-load-balancing-supports-connection-draining/

apparently works auto scaling groups - instances drained before being removed, apply spot instances being terminated aws due rising spot price?

nothing definitive find, reading on this, think answer no. spot instances different animals regular instances, , way connection draining works can specify upto 60 minute delay before connection-drained enabled instance gets terminated when becomes unhealthy - if aws allow added layer of safety spot instances, up-end way spot instances used , how positioned.

the trade-off using spot instances has been, "you can pay fraction of cost, risk being terminated @ instant without warning"...if added 60 minute 'warning' spot instances, while fantastic end-users point of view, think severely eat aws's on-demand , reserved instance pricing model , won't support anytime (unless forced competitive pressure).

edit 1/6/2015: now, year later, aws has indeed added 'two minute warning' ec2 spot instance termination. https://aws.amazon.com/blogs/aws/new-ec2-spot-instance-termination-notices/


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