[lxc-users] Using shiftfs with NFS mounted filesystem

[Amir Goldstein]

On Sun, Jul 19, 2020 at 5:13 PM Serge E. Hallyn <serge at hallyn.com> wrote:
>
> On Sun, Jul 19, 2020 at 06:53:03AM -0700, Michael Eager wrote:
> > On 7/18/20 8:37 PM, Serge E. Hallyn wrote:
> > > On Sat, Jul 18, 2020 at 11:16:16AM -0700, Michael Eager wrote:
> > > > I'm running LXD on a Centos 8 host, kernel-4.18.0.  I built and installed
> > > > the shiftfs module.
> > >
> > >  From what source?
> >
> > https://github.com/toby63/shiftfs-dkms
>
> Interesting.  Yeah the shiftfs.c looks identical to what's in
> ubuntu's, but when I backported that to 4.14 I had to also take
> a bunch of other patches (https://git.kernel.org/pub/scm/linux/kernel/git/sergeh/linux.git/log/?h=v4.14.180-shiftfs)
> which may or may not be in 4.18.  Still, I don't actually think
> that's the problem.  NFS has always been difficult to use
> with layered filesystems.
>
> Amir, as far as you know, does overlay on top of NFS work
> these days?
>

I know people are using it, but only as lower fs, which are files that
are not expected to be changed.
NFS is not supported as upper fs.

Thanks,
Amir.