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Hi,
Thanks Peter for the pointers.
There's a problem that tinydns and dnscache only listen on one ip on which
they are configured.
So on the real servers, I have IPs 10.0.0.2 and 10.0.0.3 assigned to the lo0
interface (freebsd).
How will dns.monitor (Mon) running on the primary loadbalancer reach the
tinydns or dnscache service on the real servers?
In fact, I have two DNSCache VIPs in ldirectord.cf that are accessible from
all machines except the loadbalancer itself. Therefore, I cannot resolve from
the loadbalancer.
This is because tinydns/dnscache will refuse to answer queries on any dest
address other than the one it is configured for. i.e. TinyDNS/DNSCache are
configured to listen on the vip, but will refuse to answer queries destined
the real ips.
There are patches for this, but it's also a production environment.
Thanks,
Tim
Quoting Peter Mueller <pmueller@xxxxxxxxxxxx>:
> > If the solution is not in ldirectord, can I run mon
> > simultaneously with the
> > dns.monitor script to alter the ldirectord/lvs table when a
> > DNS server stops
> > responding because of drive failures or whatever.
>
> There is probably some way in ldirectord, but since you said mon.. Here is
> a perl script that Wensong (?) wrote a long time ago in a land far, far away
> to monitor LVS through MON:
> http://www.linuxvirtualserver.org/HighAvailability.html
>
> You might have to change the -r to -R etc., minor cosmetic changes.
>
> > My goal is to at least keep the 2 DNSCache IP's loadbalanced
> > and highly-available as they are both used a lot.
>
> I think you need to find out why it is crashing and fix it. I don't like
> using LVS with DNS as DNS balances itself..
>
> P
>
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