On 2021-May-03, Tom Lane wrote: > Alvaro Herrera <alvhe...@alvh.no-ip.org> writes: > > I also heard a story where things ran into trouble (I didn't get the > > whole story of *what* was the problem with that) because the datadir is /. > > BTW, as far as that goes, I think the general recommendation is that > the datadir shouldn't be a mount point, because bad things happen if > you mount or unmount the drive while the postmaster is up. I could > see enforcing that, if we could find a reasonably platform-independent > way to do it.
/ is not a mount point; it's just that the container system binds (?) some different directory as / for the process to run into. I suppose it must be similar to chrooting to /, but I'm not sure if it's exactly that. > (Of course, / can't be unmounted, so I wonder exactly what bad thing > happened in that story.) It's not related to unmounting. I'll try to get the details. -- Álvaro Herrera Valdivia, Chile
