[SR-Users] Avoid resolving names by DNS

[Alex Balashov]

Unless Kamailio implements its own DNS query mechanism, it should use 
the system library's resolver, which hits /etc/hosts as well.  It 
works for me to use hostnames only in /etc/hosts in my dispatcher list.

Failing that, however, you can run a DNS cache locally like pdnsd or 
dnsmasq.  Pdnsd in particular can source from /etc/hosts, and you can 
put it in your /etc/resolv.conf as a nameserver.

On 09/01/2010 11:10 AM, Santiago Soares wrote:

> Hello,
>
> I'm using kamailio as a simple load balancer.
> My dispatcher list is something like that:
>
> 1   sip:server1:5060
> 1   sip:server2:5060
> 2   sip:server1:5060
>
> and /etc/hosts is
>
> 10.1.1.1   server1
> 10.1.1.2   server2
>
> When I want to do some maintenance task in one of the servers,
> server2, for exemple, I simply change /etc/hosts like that:
>
> 10.1.1.1   server1
> 10.1.1.1   server2
>
> And all the traffic is redirected to server 1. It's a simple yet
> effective way to remove a server from balancing.
> The thing is that it works on kamailio 1.5.3, but on kamailio 3.0.3 it
> doesn't work, since kamailio appears to resolv names only by DNS.
> I receive this message on startup:
>
> Sep  1 12:04:32 install /usr/local/sbin/kamailio[16077]: ERROR:
> dispatcher [dispatch.c:241]: could not resolve server1
> Sep  1 12:04:32 install /usr/local/sbin/kamailio[16077]: ERROR:
> dispatcher [dispatcher.c:247]: no dispatching list loaded from file
> Sep  1 12:04:32 install /usr/local/sbin/kamailio[16077]: ERROR: <core>
> [sr_module.c:874]: init_mod(): Error while initializing module dispatcher
>
>
> Is there any way to avoid this behavior, and force kamailio to use
> /etc/hosts?
>
> Thank you.
>
> Santiago Soares
> Fone: (41) 8488-0537
>
>
>
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-- 
Alex Balashov - Principal
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