If I understand correctly, they're using pre-release Docker in their primary test infrastructure as well as just being the system under test. I'd be curious wha

If I understand correctly, they're using pre-release Docker in their primary test infrastructure as well as just being the system under test. I'd be curious what this does to the robustness of the test system. When I was at VMware, we had analogous testing to do with ESX. But there, I was pretty careful to differentiate between "infrastructure" and "system under test," and used known-good versions on infrastructure. The reasoning was that the test automation was mission-critical and, while dogfooding was good, the cost of the infrastructure going down would have been too high to take the chance and we probably wouldn't have had the luxury of time to debug against it anyway.