Re: [PATCH] dnsmasq DBUS integration

Dan Williams wrote:
On Wed, 2012-04-18 at 09:36 -0700, Howard Chu wrote:
Would also like an option to tell NM to never write /etc/resolv.conf, but no
point in writing that patch until there's been some discussion of this DBUS patch.

What I'm very interested in here are the failure cases and how we manage
them.  Punting the problem by saying "it's not NM's job to make sure DNS
is set up correctly" isn't an option I'm interested in, since NM is
often the only thing that's arbitrating between various sources of DNS

But if NM is *not* the only thing making sure DNS is set up correctly, and a savvy sysadmin has already painstakingly configured the network on his machine, there should be a (non-default of course) config option to tell NM to keep its grubby paws off.

On my server boxes with static network configurations I would just leave NM uninstalled but that breaks too many other dependencies on modern distros. On my laptop using dnsmasq is the only sane way to work; I've got blacklists configured for spam domains and such that I want active no matter what network I've connected to.

At a minimum we need to verify that /etc/resolv.conf is
"correct" and we expect it to work.  But even just logging that fact
isn't really helpful, since that requires somebody to (a) find the logs
and (b) determine resolv.conf isn't correct, and (c) fix the problem
somehow.  There's a lot of places in the Linux networking stack for
stuff like this to fall through the cracks, and I'd like to reduce the
number of cracks instead of making more...

As default behavior I can't disagree with any of this. But if someone is actively managing their own environment there needs to be a way to configure NM to cause minimal interference.


Howard Chu wrote:
Just refreshing a patch I posted here before...

I don't see any conflict with libvirt, since that dnsmasq instance is running
with its own private dnsmasq.conf already.

This patch is relative to current git master, but also applies cleanly to the
0.9.1 source used in current Ubuntu 12.x.

As with this poster
I just want NM to leave /etc/resolv.conf alone.

  -- Howard Chu
  CTO, Symas Corp. 
  Director, Highland Sun
  Chief Architect, OpenLDAP

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