From: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
Aleksa Sarai <asarai-l3A5Bk7waGM@public.gmane.org>,
James Bottomley
<James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>,
trondmy-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org,
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jlayton-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
Linux Containers
<containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
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linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [RFC][PATCH 0/9] Make containers kernel objects
Date: Tue, 23 May 2017 16:14:41 +0100 [thread overview]
Message-ID: <2961.1495552481@warthog.procyon.org.uk> (raw)
In-Reply-To: <87zie3mxkc.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Eric W. Biederman <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org> wrote:
> > As an example, I could set up a client machine with two ethernet ports,
> > set up two DNS+NFS servers, each of which think they're called "foo.bar"
> > and attach each server to a different port on the client machine. Then I
> > could create a pair of containers on the client machine and route the
> > network in each container to a different port. Now there's a problem
> > because the names of the cached DNS records for each port overlap.
>
> Please look at ip netns add.
warthog>man ip | grep setns
warthog1>
> It does solve this in userspace rather simply.
Ummm... How? The kernel DNS resolver is not namespace aware.
David
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next prev parent reply other threads:[~2017-05-23 15:14 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-22 16:22 [RFC][PATCH 0/9] Make containers kernel objects David Howells
2017-05-22 16:22 ` [PATCH 1/9] containers: Rename linux/container.h to linux/container_dev.h David Howells
2017-05-22 16:22 ` [PATCH 2/9] Implement containers as kernel objects David Howells
[not found] ` <149547016213.10599.1969443294414531853.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2017-08-14 5:47 ` Richard Guy Briggs
2017-08-16 22:21 ` Paul Moore
[not found] ` <CAHC9VhRgPRa7KeMt8G700aeFvqVYc0gMx__82K31TYY6oQQqTw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-18 8:03 ` Richard Guy Briggs
[not found] ` <20170818080300.GQ7187-bcJWsdo4jJjeVoXN4CMphl7TgLCtbB0G@public.gmane.org>
2017-09-06 14:03 ` Serge E. Hallyn
[not found] ` <20170906140341.GA8729-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2017-09-14 5:47 ` Richard Guy Briggs
2017-09-08 20:02 ` Paul Moore
[not found] ` <149547014649.10599.12025037906646164347.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2017-05-22 16:22 ` [PATCH 3/9] Provide /proc/containers David Howells
2017-05-22 16:22 ` [PATCH 4/9] Allow processes to be forked and upcalled into a container David Howells
2017-05-22 16:23 ` [PATCH 8/9] Honour CONTAINER_NEW_EMPTY_FS_NS David Howells
2017-05-22 16:53 ` [RFC][PATCH 0/9] Make containers kernel objects James Bottomley
[not found] ` <1495472039.2757.19.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-05-22 17:14 ` Aleksa Sarai
2017-05-23 14:53 ` David Howells
[not found] ` <2446.1495551216-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2017-05-23 14:56 ` Eric W. Biederman
[not found] ` <87zie3mxkc.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-05-23 15:14 ` David Howells [this message]
[not found] ` <2961.1495552481-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2017-05-23 15:17 ` Eric W. Biederman
[not found] ` <87bmqjmwl5.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-05-23 15:44 ` James Bottomley
[not found] ` <1495554267.27369.9.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-05-23 16:36 ` David Howells
[not found] ` <3860.1495557363-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2017-05-24 8:26 ` Eric W. Biederman
[not found] ` <87k256ek3e.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-05-24 9:16 ` Ian Kent
2017-05-22 17:27 ` Jessica Frazelle
2017-05-22 18:34 ` Jeff Layton
[not found] ` <1495478092.2816.17.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-05-22 19:21 ` James Bottomley
2017-05-22 22:14 ` Jeff Layton
[not found] ` <1495480860.9050.18.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-05-23 10:35 ` Ian Kent
2017-05-23 9:38 ` Ian Kent
2017-05-23 13:52 ` David Howells
[not found] ` <32556.1495547529-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2017-05-23 15:02 ` James Bottomley
2017-05-23 15:23 ` Eric W. Biederman
2017-05-22 17:11 ` Jessica Frazelle
2017-05-22 19:04 ` Eric W. Biederman
[not found] ` <87lgpoww67.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-05-22 22:22 ` Jeff Layton
[not found] ` <1495491733.25946.3.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-05-23 12:54 ` Eric W. Biederman
[not found] ` <874lwbraxh.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-05-23 14:27 ` Jeff Layton
2017-05-23 14:30 ` Djalal Harouni
[not found] ` <CAEiveUcbmm5m4=11ZppxAWppeoFWUBFpLC7dAZRuBCTFHR548g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-05-23 14:54 ` Colin Walters
2017-05-23 15:30 ` David Howells
[not found] ` <1495551292.2742620.985957224.3FCF254A-2RFepEojUI2N1INw9kWLP6GC3tUn3ZHUQQ4Iyu8u01E@public.gmane.org>
2017-05-23 15:31 ` Jeff Layton
[not found] ` <1495553491.2946.16.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-05-23 15:35 ` Colin Walters
2017-05-23 14:23 ` Djalal Harouni
2017-05-23 16:13 ` David Howells
2017-05-27 17:45 ` Trond Myklebust
[not found] ` <1495907132.4591.3.camel-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2017-05-27 19:10 ` James Bottomley
2017-05-30 1:03 ` Ian Kent
2017-05-23 10:09 ` Ian Kent
2017-05-23 15:33 ` Eric W. Biederman
2017-05-22 16:23 ` [PATCH 5/9] Open a socket inside a container David Howells
2017-05-22 16:23 ` [PATCH 6/9] Allow fs syscall dfd arguments to take a container fd David Howells
2017-05-22 16:23 ` [PATCH 7/9] Make fsopen() able to initiate mounting into a container David Howells
2017-05-22 16:23 ` [PATCH 9/9] Sample program for driving container objects David Howells
[not found] ` <CAEk6tEyjk4=rHfsJUZ7dYPpdSa-=QX6QAm8ni8-ySpHmjUMwTg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-05-23 15:12 ` [RFC][PATCH 0/9] Make containers kernel objects David Howells
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