software not hardware
Identical Docker, Identical OS – Crashing on 50% of the Hardware
February 16, 2016
Gather round l’il ones and let old man Jon tell you a little story about the time he learned to never say never. Twas not terribly long ago when he was trying to spin up a fleet of Squid Proxies. Being the hip DevOps guru he is, the proxies were stored safely inside of Docker containers. Those containers were all pulled from the same single source, so they were identical (as one would expect from Docker). It also happens that these Docker containers were being spun up on a pair of brand new AWS EC2 instances. Same AMI, same bootstrap script, same software updates. Everything on every container should be identical. However when it came time to spin up the containers… 50% of them failed. W. T. F?