etcd is an excellent key-value distributed database used internally by Kubernetes and managed by the CNCF. It’s a great option, and that’s the reason why Apache APISIX uses it too. Yet, it’s not devoid of issues. First, some mention scalability, but one can expect this from a distributed data store that values consistency. Another issue may be the need for more familiarity with etcd.

Do you remember the classic Atari ST game where you, as a fish, eat other fishes while getting bigger and avoiding bigger fishes to eat you? It seems the last 4 years has seen its share of fishes eat and being eaten.