aws-samples/ecs-refarch-mixed-mode

Provides reference architecture and CloudFormation templates to power ECS using a mix of spot instances and ondemand instances with independent autoscaling

ecs-refarch-mixed-mode's Issues

ClusterHighMemoryReservationAlarm - description & periods not in sync

ClusterHighMemoryReservationAlarm description states:

Average Memory Reservation for the boxes in the ASG is above
70% for 3 minutes. Triggers scale up

But the Period & EvaluationPeriods come to 1 minute:

Period: '60'
EvaluationPeriods: '1'

Either the description should be tweaked, or it should be set to 3 periods.

Question re instance-purchase-option placement strategy

Hi there,

Thank you very much for providing this reference architecture!

I would like to ask question re use of instance-purchase-option placement strategy.

In current setup you have 2 distinct clusters and 2 services that deployed in to different clusters:

1. on-demand
2. spot

As you always deploying spot service in to spot cluster and you always deploying on-demand service in to on-demand cluster why do you use instance-purchase-option placement strategy?

I understand that it would make sense to use it in case of one cluster that has on-demand and spot instances mixed together but when you have 2 separate clusters .... Am I missing something? :)

Thanks!

Andriy