I love using spot instances with a Bamboo remote agent in AWS. Really great. I even baked a custom AMI with fully customized build environment.

A modest improvement that would make this experience even better is supporting EC2 spot pausing and/or instance hibernation. If I had to make an emergency build such as to push a corrective change, and a remote agent had not been spun up, there is a good 3-5 minute wait depending on when AWS fulfills my spot request.

Spot: https://aws.amazon.com/about-aws/whats-new/2017/11/amazon-ec2-spot-lets-you-pause-and-resume-your-workloads/

Non Spot: https://aws.amazon.com/blogs/aws/new-hibernate-your-ec2-instances/

If I could have a remote agent instance that Bamboo intelligently paused or hibernated when idle as opposed to terminate, then I could leverage much faster agent start times, and probably save money by shortening the idle timeout which I have currently set to 4 hours.