I have a hard-to-reproduce situation where dnsmasq doesn't re-read the
configured resolv conf when it changes. I'm running dnsmasq 2.79. I
realise that this is rather behind the times but upgrading it on the
platform in question is non-trivial; could someone suggest whether
updating is likely to fix this problem please?
My dnsmasq.conf looks like this:
C25CTW001538:~$ cat /etc/dnsmasq.conf
resolv-file=/etc/dnsmasq/resolv.conf
conf-dir=/etc/dnsmasq.d/,*.conf
interface=vsys0
interface=lo
bind-interfaces
max-cache-ttl=30
clear-on-reload
log-queries
The directory /etc/dnsmasq.d is empty. /etc/dnsmasq/resolv.conf looks
like this:
C25CTW001538:~$ cat /etc/dnsmasq/resolv.conf
nameserver 10.101.0.1
I've confirmed by attaching strace to the process that there is no
activity in the process when this file changes.
I don't know how to reproduce this; the only way I've found so far is
to reboot the thing repeatedly until it does it; in about eight hours
of doing this so far, it's happened twice. I've tried various
combinations of doing interesting things with the file, starting
dnsmasq and then changing the file but the file is always re-read
correctly in these cases. Sending SIGHUP to the dnsmasq process
doesn't help.
Many thanks for any assistance,
Tom Cook
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