Alternative to the filesystem overlay
Alexander A. Filippov
a.filippov at yadro.com
Wed Aug 21 17:09:33 AEST 2019
On Tue, Aug 20, 2019 at 05:56:32PM -0700, Terry Duncan wrote:
> On 8/16/19 2:09 AM, Alexander A. Filippov wrote:
> > Most of these issues can be solved by the simple shell scripts. We could modify
> > the initramfs/init scenario to exec these scripts at the moment when ROFS and
> > RWFS have mounted but are not combined to OVERLAY yet.
> > Of course, this method doesn't prevent an occurrence of any new issues of this
> > type but brings an easy way to solve them.
> > --
> > Regards,
> > Alexander
> Possibly the overlay FS is not expecting and does not support the ROFS to
> change as it does when a new build adds a file to an existing directory.
> When this occurs an overlayed file in the same directory could cause
> corruption in the directory. Are you suggesting scripts that detect a change
> to the underlying FS and attempt to patch the overlay?
That's not entirely true. I'm suggesting to keep the scripts to solve each
particular issue. But if we can detect and resolve such issues automatically
that would be nice.
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