Programmer Humor

19735 readers

619 users here now

Welcome to Programmer Humor!

This is a place where you can post jokes, memes, humor, etc. related to programming!

For sharing awful code theres also Programming Horror.

Rules

Keep content in english
No advertisements
Posts must be related to programming or programmer topics

founded 1 year ago

MODERATORS

[email protected]

269

Microservice architecture, they said. It will be fun, they said. (programming.dev)

submitted 1 year ago by [email protected] to c/[email protected]

30 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 7 points 1 year ago* (last edited 1 year ago) (1 children)

Because dogma. There are tons of places running production postgres, and indeed many other stateful services, in Kubernetes.

Edit because presumably GP downvoted me for contradicting them, since I've personally overseen this in production at Fortune 100 companies and unicorn startups alike:

https://dok.community/

https://github.com/zalando/postgres-operator

And plenty of YouTube videos from various kubecons and CloudNativeCons. Kubernetes is a runtime and provides plenty of primitives for safely running stateful workloads even better than otherwise possible. Anyone who says otherwise hasn't bothered directly learning enough about the possibilities and is likely citing oft-quoted dogma that dates back to the earliest days of k8s and was questionable even then.

[–] vapeloki 2 points 1 year ago* (last edited 1 year ago)

No, because of many factors:

The last 10 years, I managed 700 database Clusters. Anything from a few megs to terrabyte database sizes.

The main issues are:

huge pages. They work an bare metal, not so much in kubernetes ( I am not talking about transparent huge pages....)
Core/cache locality.
NUMA

And of course: maintainability. Especially in the PIT recovery.

Zalando has an open source operator + patroni bases images. They work for many cases, and are a great way if you can't manage postgresql on bare metal.

And of course: if you have everything running on k8s, running a few bare metal servers for a db is a pain in the ass, and in such cases it is if course better to just deploy an operator in your cluster and let it handle the heavy lifting like backup and replication.