network namespace and DNS lookups

Has there been any work in any of the recent kernels to limit the DNS lookup
to a particular network namespace?  Do we have any facility to specify the
DNS resolvers on network namespace basis (such as /etc/ns/resolv.conf)?

thank you
ravi/

I think I sent my earlier email a bit prematurely.  I do have
/etc/netns/<namespace-name>/resolv.conf
files under each of my namespaces. Now the question is, how does a
user space process
(say bind)  look at a namespace specific resolv.conf instead of
default one?  Have any of
these standard applications been modified to work with namespace
specific config files?

thanks again
ravi/

On Tue, Dec 18, 2012 at 10:09 AM, Ravi Aysola [off-list ref] wrote:

Has there been any work in any of the recent kernels to limit the DNS lookup
to a particular network namespace?  Do we have any facility to specify the
DNS resolvers on network namespace basis (such as /etc/ns/resolv.conf)?

thank you
ravi/

On Tue, 2012-12-18 at 10:49 -0500, Ravi Aysola wrote:

I think I sent my earlier email a bit prematurely.  I do have
/etc/netns/<namespace-name>/resolv.conf
files under each of my namespaces. Now the question is, how does a
user space process
(say bind)  look at a namespace specific resolv.conf instead of
default one?  Have any of
these standard applications been modified to work with namespace
specific config files?

Wouldn't that be the glibc resolver's domain?  DNS lookups aren't done
by the kernel, but by glibc in userspace.  And glibc is also what reads
resolv.conf, so most things DNS-namespace related would need to happen
there.

Dan

thanks again
ravi/

On Tue, Dec 18, 2012 at 10:09 AM, Ravi Aysola [off-list ref] wrote:

quoted

Has there been any work in any of the recent kernels to limit the DNS lookup
to a particular network namespace?  Do we have any facility to specify the
DNS resolvers on network namespace basis (such as /etc/ns/resolv.conf)?

thank you
ravi/

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