Why etcd breaks at scale in Kubernetes is a great article that describes, what etcd is, how it works in nutshell, what are its limitations; and, most importantly, why does it all matter to Kubernetes.

I had an etcd cluster becoming read-only due to the backend quota. The fact that this happened on the 1st of January added insult to injury.

P.S. LearnKube is a great resource for all the Kubernetes related topics. I highly recommend reading their other articles as well, if you want to get more familiar with the technology!

#kubernetes #etcd