From: "Rafał Miłecki" <zajec5@gmail.com>
To: Miklos Szeredi <miklos@szeredi.hu>,
Amir Goldstein <amir73il@gmail.com>,
Christian Brauner <brauner@kernel.org>,
Vivek Goyal <vgoyal@redhat.com>,
Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-unionfs@vger.kernel.org,
Luiz Angelo Daros de Luca <luizluca@gmail.com>
Subject: Can overlayfs follow mounts in lowerdir?
Date: Thu, 22 Feb 2024 07:19:00 +0100 [thread overview]
Message-ID: <67bb0571-a6e0-44ea-9ab6-91c267d0642f@gmail.com> (raw)
Hi,
I'm trying to use overlay to create temporary virtual root filesystem.
I need a copy of / with custom files on top of it.
To achieve that I used a simple mount like this:
mount -t overlay overlay -o lowerdir=/,upperdir=/tmp/ov/upper,workdir=/tmp/ov/work /tmp/ov/virtual
In /tmp/ov/virtual/ I can see my main filesystem and I can make temporary
changes to it. Almost perfect!
The problem are mounts. I have some standard ones:
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
They are not visible in my virtual root:
# ls -l /tmp/ov/proc/
# ls -l /tmp/ov/sys/
# ls -l /tmp/ov/tmp/
(all empty)
Would that be possible to make overlayfs follow such mounts in lowerdir?
--
Rafał
next reply other threads:[~2024-02-22 6:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-22 6:19 Rafał Miłecki [this message]
2024-02-22 9:01 ` Can overlayfs follow mounts in lowerdir? Christian Brauner
2024-02-22 10:34 ` Rafał Miłecki
2024-02-22 10:38 ` Miklos Szeredi
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