On Tue, Apr 26, 2005 at 11:40:13AM +0100, Simon Kelley wrote:
> Leonardo Canducci wrote:
> >Package: dnsmasq
> >Version: 2.22-1
> >Severity: important
> >
> >
> >I'm using dnsmasq with resolvconf and pppoe with 'usepeerdns' option set
> >for pppd.
> >At boot time since dnsmasq is started before pppd gets DNS from ISP
> >('usepeerdns' option) when it reads /var/run/dnsmasq/resolv.conf the
> >file is empty. That way dnsmasq is not usable at all nor it is updated
> >when, just a few seconds later, pppd gets its DNS servers from ISP and
> >resolvconf appends them to /var/run/dnsmasq/resolv.conf.
> >Restarting dnsmasq fixes the problem, but documentation suggests that
> >kind of configuration should work 'out of the box'.
> >
>
> Do you run an NTP client as part of the start sequence? Dnsmasq checks
> the modification time of the resolv.conf file and re-reads the file when
> the modification time changes. It's possible that an NTP client
> warping the clock could confuse this.
I do run ntpdate. It fails at boot since pool.ntp.org is unreacheable
until pppd gets its dns servers. A script called /etc/ppp/ip-up.d/ntpdate
is run just after pppd gets IP and dns servers and time is adjusted.
Usually step time is under 3 seconds so it shouldn't affect dnsmasq
check AFAIK.
from syslog I see:
Apr 26 08:48:49 cervellone pppd[3127]: primary DNS address 80.17.209.xxx
ls --full-time /var/run/dnsmasq/resolv.conf
-rw-r--r-- 1 root root 49 2005-04-26 08:48:49.230005584 +0200
/var/run/dnsmasq/resolv.conf
the file lists two dns servers.
from syslog I see:
Apr 26 08:48:34 cervellone dnsmasq[3954]: reading /var/run/dnsmasq/resolv.conf
and no further checks.
after sudo /etc/init.d/dnsmasq restart, from syslog:
Apr 26 16:58:25 cervellone dnsmasq[12827]: using nameserver 80.17.209.xxx#53
and dnsmasq works fine.
possible cause: maybe dnsmasq checks the modification time of
/var/run/dnsmasq/resolv.conf with one minute precision. if so this file
can be created and updated within a minute so file is considered unchanged.
bye
>
> Cheers,
>
> Simon.
>
>
--
Leonardo Canducci
GPG Key ID: 429683DA
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