Re: Frequent errors with OverlayFS on root

[Vivek Goyal <vgoyal@redhat.com>]

On Thu, Sep 03, 2020 at 11:53:03AM +0200, Miklos Szeredi wrote:
> On Thu, Sep 3, 2020 at 11:24 AM Mauro Condarelli <mc5686@mclink.it> wrote:
> 
> > FYI: using OverlayFS this way and for this use-case was suggested
> > by SWUpdate maintainer (Stefano Babic) so I guess there are other
> > people relying on "correct" behavior around the world .
> 
> So my opinion is that this use case (modifying or even completely
> swapping out the lower layer while it is not mounted) should work
> perfectly fine with a "plain" configuration.
> 
> Doing this with redirect_dir, metacopy or index does sound somewhat
> scary and some of that obviously won't even work because of the broken
> origins.

Hi Miklos,

Shall we document that changing/swapping lower layers with existing
upper is not supported configuration with advanced features like
metacopy/redirect_dir/index.

This topic has come up now multiple times recently. It will be good
to make it very clear in documentation.

Thanks
Vivek