SQLite does work on NFS even in read-write scenario. Discovered by accident, but my statement still holds. The WAL mode is explicitly not supported over network filesystems, but I guess you don't expect it to :)

My experience has been the opposite... Lots of db lock and corruption issues. The FAQ doesn't call out WAL specifically, just says don't do it at all: https://www.sqlite.org/faq.html#q5

I've had multiple flaky issues with SQLite (e.g. non-HA Grafana) on Azure Files using NFS v4.1 leading to locked DBs. Perhaps some implementations work, I'm not gonna rely on it or advise others to do so.

Yeah trying to write from several hosts will certainly fail if you don't have advisory locks working, which is not a given, so you are right of course

These were singular containers, let alone hosts.