David Howells <dhowells@xxxxxxxxxx> writes: > Eric W. Biederman <ebiederm@xxxxxxxxxxxx> 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> Not setns netns >> It does solve this in userspace rather simply. > > Ummm... How? The kernel DNS resolver is not namespace aware. But it works fine if called in the proper context and we have a defacto standard for where to put all of the files (the tricky part) if you are dealing with multiple network namespaces simultaneously. Eric
