CoreOS and Spot Instances just for funzies

Over the last year I've grown quite fond of the idea of spot instances on EC2. The idea that you can spin up a relatively large cluster for almost no money to play around with new technology and tools is amazing. I've been playing with CoreOS and the various cloud_config options for the last few hours, and I was getting sick of having to click through the EC2 console every time I wanted to spin a new cluster based »