Subject: Using unionfs on guest root
From: Oliver Welter <mail@oliwel.de>
Date: Mon, 25 Aug 2008 01:43:02 +0200

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Hi All,

I am playing around with aufs (unionfs) and dont find the right way to
do the following:

I want to have a readonly root-image and mount a writable partition on
top of it. I can so so mounting the trees first in the main context and
than start the vserver, but I want to do it in the context of the guest,
so it is not visible outside.

I put the aufs mount in the guest fstab:
none / aufs dirs=overlay:rootfs=ro 0 0

When I launch the guest, I get:
vcontext(/dev/null) permission denied

Anybody has a working setup?

Oli
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