[RFC][PATCH 0/9] Make containers kernel objects

David Howells dhowells at redhat.com
Tue May 23 15:14:41 UTC 2017


Eric W. Biederman <ebiederm at xmission.com> 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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