Groups > comp.os.linux.development.apps > #920

Re: Need advice about fixing PROC mount failures in a DIY Linux container

From	Rainer Weikusat <rweikusat@talktalk.net>
Newsgroups	alt.os.linux.slackware, comp.os.linux.misc, comp.os.linux.development.apps, comp.unix.programmer
Subject	Re: Need advice about fixing PROC mount failures in a DIY Linux container
Date	2023-01-09 19:27 +0000
Message-ID	<87mt6ry0dq.fsf@doppelsaurus.mobileactivedefense.com> (permalink)
References	<tpahpv$3a27i$1@dont-email.me> <tpaker$3advh$1@dont-email.me>

Cross-posted to 4 groups.

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Lew Pitcher <lew.pitcher@digitalfreehold.ca> writes:

[...]

> Well, I can answer my own question, now. But the answer
> leads to more questions.
>
> The reason I get "Operation not permitted" on the
> container /proc mount on my "production" system is that
> I also run an nfs server on my "production" system (and
> do not run one on my development system), and is nfs
> server maintains two mountpoints within the /proc
> filesystem.
>
> Apparently, the attempt to mount /proc within my container
> was blocked by the existance of these two mount points
> (/proc/fs/nfs and /proc/fs/nfsd), as when I shut down my
> rpc and nfs servers, and umounted these two mounts, I could
> successfully run my demo container.
>
> /Now/ the question is: how do I get my container /proc mount
> to ignore or bypass these two nfsd mounts?

Instead of doing a bind mount of a proc filesystem already mounted
somewhere, you could mount a new instance of it. The command for this
would be

mount -t proc proc <mount point>

You'll generally also want to mount sysfs, BTW.

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Thread

Need advice about fixing PROC mount failures in a DIY Linux container Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2023-01-07 01:27 +0000
  Re: Need advice about fixing PROC mount failures in a DIY Linux container Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2023-01-07 02:12 +0000
    Re: Need advice about fixing PROC mount failures in a DIY Linux container Jasen Betts <usenet@revmaps.no-ip.org> - 2023-01-07 07:06 +0000
    Re: Need advice about fixing PROC mount failures in a DIY Linux container John-Paul Stewart <jpstewart@personalprojects.net> - 2023-01-07 11:41 -0500
    Re: Need advice about fixing PROC mount failures in a DIY Linux container Rainer Weikusat <rweikusat@talktalk.net> - 2023-01-09 19:27 +0000

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