linux-kernel - Re: [PATCH 1/2] fs/ceph/debugfs: make all files world-readable

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Date:   Tue, 26 Sep 2023 11:09:14 +0200
From:   Max Kellermann <max.kellermann@...os.com>
To:     Ilya Dryomov <idryomov@...il.com>
Cc:     Xiubo Li <xiubli@...hat.com>, Jeff Layton <jlayton@...nel.org>,
        ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] fs/ceph/debugfs: make all files world-readable

On Tue, Sep 26, 2023 at 10:46 AM Ilya Dryomov <idryomov@...il.com> wrote:
> No, "ceph" command (as well as "rbd", "rados", etc) can be run from
> anywhere -- it's just a matter of installing a package which is likely
> already installed unless you are mounting CephFS manually without using
> /sbin/mount.ceph mount helper.

I have never heard of that helper, so no, we're not using it - should we?

This "ceph" tool requires installing 90 MB of additional Debian
packages, which I just tried on a test cluster, and "ceph fs top"
fails with "Error initializing cluster client: ObjectNotFound('RADOS
object not found (error calling conf_read_file)')". Okay, so I have to
configure something.... but .... I don't get why I would want to do
that, when I can get the same information from the kernel without
installing or configuring anything. This sounds like overcomplexifying
the thing for no reason.

Max