I recently found out that when Packer generates an AMI it also creates EBS snapshots and those snapshots are not cleaned up when the AMI is de-registered. Here’s the script I now use to manage a rolling window of the most recent AMIs Continue reading
There is surprisingly little information on how to optimize costs using the AWS spot instance market. There are several services that provide management on top of the spot market if you have an architecture that supports an interruptible workload but very little in the way of how to go about doing it yourself other than surface level advice on setting up autoscaling groups. To remedy the situation here’s an outline of how I’ve solved part of the problem for CI (continuous integration) type of workload Continue reading
If you are using the cloud for you infrastructure then you need to version it the same way you version your code and deployment artifacts. Lately, I’ve been using packer to generate AMIs and I couldn’t be happier with how things are working out. I now have a consistent environment whenever I want to experiment with something and when I discover something worthwhile that I think should be a basic functionality of all environments I need then I check that into the repository that contains the packer templates and regenerate all the AMIs. This means I can go back to any point in time and spin up an environment exactly as it existed at that time. Infrastructure is no longer something special. It is now just another artifact in a software development pipeline and you should treat it that way.