"At a recent CoreOS meetup, I gave a presentation on the design and implementation of Psyduck, which is the name for MemSQL’s test infrastructure."

So does the test infrastructure get exponentially more powerful when under pressure, or what?

Awesome! I wish I had the opportunity to work with a large scale docker/coreos deployment like this. I really perked up when you started talking about PXE booting, I wanted to see what you guys were doing to manage updates.

I'm trying to make automated updates when using PXE[0].

When installed to disk, CoreOS's update manager automatically polls for updates and downloads them in the background. On next reboot, the new version is shifted into place. This is unfortunately unavailable when booting with PXE.