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Yup. We do that.

Anything stateful is not allowed inside the cluster. PVs are annoying enough without having to manage a DB bolted onto what was originally designed for stateless web services.

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My db is my cluster. It's been stable for years but I'm afraid to touch it. There's a long outstanding issue in k8s that makes PVs harder to resize than it should be. And they're just more complicated. Trying to move to managed MySQL now. It'll cost me a bunch more but at least I get a fail over node which I don't know how to set up myself... Still no master-master though, apparently that's not an option.

Actually resizing PVC depends on the CSI drive. Some support easy resizing, some require the volume to be detached. You can double check your CSI driver and might just need to patch your storage class.

Agreed running databases without operators that can handle replication, master promotion backups and PIT restore is super scary. Most of the modern operators support all of these operations.

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