linux-kernel - Re: Detecting if you are running in a container

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Message-ID: <m17h478n5k.fsf@fess.ebiederm.org>
Date:	Fri, 14 Oct 2011 11:04:55 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Ted Ts'o <tytso@....edu>
Cc:	Kyle Moffett <kyle@...fetthome.net>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Lennart Poettering <mzxreary@...inter.de>,
	Kay Sievers <kay.sievers@...y.org>,
	linux-kernel@...r.kernel.org, harald@...hat.com, david@...ar.dk,
	greg@...ah.com, Linux Containers <containers@...ts.osdl.org>,
	Linux Containers <lxc-devel@...ts.sourceforge.net>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Daniel Lezcano <daniel.lezcano@...e.fr>,
	Paul Menage <paul@...lmenage.org>
Subject: Re: Detecting if you are running in a container

Ted Ts'o <tytso@....edu> writes:

>> I am of course making it sound a million times easier than it's
>> actually likely to be, but I do think it's possible without too many
>> odd corner cases.
>
> It's not the corner cases, it's all of the different name spaces that
> different system administrators and their sites are going to want to
> use, and how to support them all....
>
> And of course, once we start naming uid name spaces, eventually
> someone will want to virtualize containers, and then we will have
> namespaces for namespaces.  (It's turtles all the way down!  :-)

I have found and merged a solution that allows us to name namespaces
without needing a namespaces for namespaces.

Eric

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