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Hello juano1985,
It would be better if you could provide a snippet of the question so we can look it up. But yes, you’re correct. Spot Instances offer a cost-effective option If you can adjust the running times of your applications and if they can be interrupted. However, Spot capacity might be unavailable during extremely high demand. This can cause Amazon EC2 Spot instance launches to be delayed when the overall demand for capacity increases.
To mitigate the risk of downtime, Amazon ECS allows a container instance to be transitioned to a DRAINING status. When in DRAINING status, Amazon ECS prevents new tasks from being scheduled on the container instance. The service scheduler will initiate replacement tasks if the cluster has sufficient capacity for container instances. However, if there is insufficient container instance capacity, a service event message will be sent indicating the issue.
I hope this helps. Let us know if you have any further questions.
Regards,
JR @ Tutorials Dojo
