Re: unionfs in jails

Hello Sulev-Madis,

I notice this warning during 20+ years also.

This warning makes me sad every time I use unionfs. It seems that in my current case I could avoid using unionfs because I just want to merge directories. 

But we do not  have more restricted and less functionally but more bullet proof fs  module to just stack directories like in plan9. Without it unionfs is the only way.


Wednesday, April 9, 2025, 10:52:00 PM, you wrote:

> yeah i hate to read this

> BUGS
>      THIS FILE SYSTEM TYPE IS NOT YET FULLY SUPPORTED (READ: IT DOESN'T WORK)
>      AND USING IT MAY, IN FACT, DESTROY DATA ON YOUR SYSTEM.  USE AT YOUR OWN
>      RISK.

> from manpage of a really useful fs. it has been like that for 10+ years. 20? 20+? when was it added anyway?

> in my case, it allows one to use ro system like installer livecd to be used with rw tmpfs overlays

> 10y ago i also used it to put together a final rootfs tree for embedded system. i currently use rsync and/or tar | tar for this

> i look unionfs to be actually supported, fixed, usable fs so that warning could be removed! but i can't do this myself...

> i can test tho



> On April 9, 2025 10:26:52 PM GMT+03:00, Olivier Certner <olce@freebsd.org> wrote:
>>Hi,
>>
>>There's no reason (that I know of) you could not use unionfs in jails.  However, unionfs has been needing attention and deep fixes for a long time (irrespective of its use in jails), which has been on my TODO list for a while (work should start relatively soon now...).  There has been stabilization work by jah@ in the past years.  At this point, your best bet is just to try it and report any problem you encounter.
>>
>>Thanks and regards.
>>



-- 
Best regards,
Anthony