Are remote / network filesystems supported as upperdir? about fuse-overlayfs HOT 5 CLOSED

we don't disable that, but to my knowledge it wasn't tested. Have you already tried to run it with CephFS?

from fuse-overlayfs.

I haven't been able to test with CephFS yet, having some issues with using the static build on that machine, the "merged" folder is returning a bunch of ???-s:

[salia@'h:ofs-test ] $ls -laht
ls: cannot access 'merged': Invalid argument
total 20K
drwxr-xr-x  3 salia domain users 4.0K Nov 11 15:36 workdir
drwxr-xr-x  6 salia domain users 4.0K Nov 11 15:36 .
drwxr-xr-x  2 salia domain users 4.0K Nov 11 15:36 upperdir
drwxr-xr-x  2 salia domain users 4.0K Nov 11 15:36 lowerdir
drwxrwxrwt 13 root  root         4.0K Nov 11 15:36 ..
d?????????  ? ?     ?               ?            ? merged

I tried on my local machine with sshfs as upperdir / workdir, unfortunately if I change the files remotely (e.g. add a new file), it shows up properly in sshfs based upperdir, but the merged directory is not showing the changes. If I remount the overlayfs, then it shows up. Is there maybe some cache setting that could be set up to invalidate after a certain amount of time so that changes that were done remotely get picked up?

from fuse-overlayfs.

yes, I think you would like to tweak -o timeout=N, where with N=0 the caching is disabled.

from fuse-overlayfs.

With N=0, the problem is gone, however with anything larger, it seems the cache is never invalidated. Can it be a problem that the underlying FS of the overlay is another fuse mount?

from fuse-overlayfs.

Closing this as with N=0 it seems to work with remote filesystems.

from fuse-overlayfs.