Should I Run Postgres on Kubernetes?

If you’re asking this question, you should probably be using RDS or another hosted Postgres service.

Personally prefer to operate Postgres on ZFS pools. This offers checksumming (integrity), filesystem-level compression (reduced IO hence faster reads), nvm-e ZIL (faster writes). ZFS also supports snapshotting, so if you run the database in a jail, you can snapshot the entire jail, send it over the network, and start it on another host in exactly the state it was snapshotted.

Where is your Kubernetes running? If you're using a managed kubernetes vendor you might as well use their managed postgres offering if they have one.

From my experience, if you're running a MVP/toy-app type setup with a single instance of postgres with a volume mount, things work absolutely fine and are very easy to get going with. But anything serious needs consideration.

Also, depends on your team structure. Do you already have experienced DBAs that managed your postgres setup? Are they willing to learn what it takes to run a kubernetes operator? Will you benefit from running it on Kubernetes or is that compute/memory/disk resource reserved anyway?