named and jail startup race condition

Arthur Chance freebsd at
Fri Nov 6 13:21:42 UTC 2015

On 06/11/2015 10:39, Andrea Venturoli wrote:
> Hello.
> Let's suppose that on a 9.3 system I set up a jail (through ezjails if
> it matters and as described in the handbook) and configure it to resolve
> through named from base system.
> In base's /etc/named/named.conf I have
>  > listen-on       {;; ...}
> is lo1's address, which is the interface/IP of the jail.

I presume that should have been

> A problem arises since named starts before ezjail, so lo1 is not yet
> configured and it cannod bind to that interface.
> After a reboot, name resolution inside the jail won't work until I
> restart named (which will then be able to bind to the, now existent, lo1
> interface).
> I wonder what are the best practices to overcome this issue:
> _ change named rc.d script, so it starts after ezjail (doesn't seem a
> good idea to me)?
> _ preconfigure lo1 in rc.conf?

That's what I do, otherwise if you have more than one jail which one 
creates the interface?

> _ ...
> Or, maybe, I'm doing it all wrong and there is a better way?

Moore's Law of Mad Science: Every eighteen months, the minimum IQ
necessary to destroy the world drops by one point.

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