"The theory behind SRV is that given a domain name, for instance,
<a href="http://example.com">example.com</a>, and a service name, for example, web (http) which runs on
a protocol (tcp in the web case case), a DNS query may be issued to
find the host name that provides such a service for the domain" -from <a href="http://www.zytrax.com/books/dns/ch8/srv.html">http://www.zytrax.com/books/dns/ch8/srv.html</a><br><br>So, what you will get is a list of host names that provide the service you're looking for. Then, you have to try those hosts until you get a response.<br>
What I've just realized is that db_mysql module may not support this...<br><br>Pablo<br><br><div class="gmail_quote">On Tue, Nov 25, 2008 at 12:20 PM, Matteo D'Amato <span dir="ltr"><<a href="mailto:matteo@ecosma.com">matteo@ecosma.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">With SRV, if one box is down will it still get hit or does the
DNS only send to the one that is up?</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0in 0in;">
<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a> [mailto:<a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a>] <b>On
Behalf Of </b>Pablo Hernan Saro<br>
<b>Sent:</b> Tuesday, November 25, 2008 8:04 AM<br>
<b>To:</b> Krunal Patel<br>
<b>Cc:</b> <a href="mailto:users@lists.opensips.org" target="_blank">users@lists.opensips.org</a><br>
<b>Subject:</b> Re: [OpenSIPS-Users] Help!! How to do failover of mysql
connection</span></p>
</div><div><div></div><div class="Wj3C7c">
<p> </p>
<p style="margin-bottom: 12pt;">That will not work. Try DNS
SRV. Take a look at this link <a href="http://www.zytrax.com/books/dns/ch8/srv.html" target="_blank">http://www.zytrax.com/books/dns/ch8/srv.html</a><br>
Hope it helps.<br>
<br>
Pablo</p>
<div>
<p>On Tue, Nov 25, 2008 at 2:51 AM, Krunal Patel <<a href="mailto:krunal.lists@gmail.com" target="_blank">krunal.lists@gmail.com</a>> wrote:</p>
<p>Hi,<br>
<br>
is it fine if I use DSN resolver?<br>
Let me explain in detail:<br>
I setup a DSN resolver & add A record for mysql servers.<br>
mysql
A <a href="http://192.168.1.5" target="_blank">192.168.1.5</a><br>
mysql
A <a href="http://192.168.1.6" target="_blank">192.168.1.6</a><br>
<br>
where <a href="http://192.168.1.5" target="_blank">192.168.1.5</a> & <a href="http://192.168.1.6" target="_blank">192.168.1.6</a> are mysql cluster
nodes.<br>
<br>
So <a href="http://mysql.somedomain.com" target="_blank">mysql.somedomain.com</a>
will point to both servers.<br>
It will do load balance & failover both.<br>
<br>
Please confirm that it will not create any issue.<br>
<br>
Thanks,<br>
<span style="color: rgb(136, 136, 136);">Krunal Patel</span></p>
<div>
<div>
<p style="margin-bottom: 12pt;"> </p>
<div>
<p>On Tue, Nov 25, 2008 at 1:35 AM, Geoffrey Mina <<a href="mailto:geoffreymina@gmail.com" target="_blank">geoffreymina@gmail.com</a>>
wrote:</p>
<p>This problem has been solved many times. The absolute
most bomb-proof<br>
MySQL failover solution involves a combination of DRBD and Linux HA<br>
(Heart Beat). The replication model has too many issues IMO.</p>
<div>
<div>
<p><br>
<br>
<br>
<br>
On Sun, Nov 23, 2008 at 9:10 AM, Uwe Kastens <<a href="mailto:kiste@kiste.org" target="_blank">kiste@kiste.org</a>> wrote:<br>
> Hi Krunal,<br>
>> * I am having 2 MySql servers. Lets say <a href="http://192.168.1.5" target="_blank">192.168.1.5</a><br>
>> <<a href="http://192.168.1.5" target="_blank">http://192.168.1.5</a>>
& <a href="http://192.168.1.6" target="_blank">192.168.1.6</a> <<a href="http://192.168.1.6" target="_blank">http://192.168.1.6</a>><br>
>> * Opensips is at <a href="http://192.168.1.4" target="_blank">192.168.1.4</a> <<a href="http://192.168.1.4" target="_blank">http://192.168.1.4</a>>.<br>
>> * I would like to use <a href="http://192.168.1.6" target="_blank">192.168.1.6</a> <<a href="http://192.168.1.6" target="_blank">http://192.168.1.6</a>>
mysql server<br>
>> for failover.<br>
>> * I mean to say if <a href="http://192.168.1.5" target="_blank">192.168.1.5</a> <<a href="http://192.168.1.5" target="_blank">http://192.168.1.5</a>>
goes down then<br>
>> opensips should start to use <a href="http://192.168.1.6" target="_blank">192.168.1.6</a> <<a href="http://192.168.1.6" target="_blank">http://192.168.1.6</a>><br>
>> mysql server.<br>
>><br>
><br>
> I am just on my way to implement the same. At the moment I am planing a<br>
> kind of Mysql Master - Master together with one VIP for<br>
> Mysql-opensips-communication. So for your example you will have to<br>
> mysql-servers. opensips is connection to lets say to <a href="http://192.168.1.4" target="_blank">192.168.1.4</a> which<br>
> points on one of your mysql-servers. You will need active-active for<br>
> mysql since opensips will write some information in the database as well.<br>
><br>
><br>
> I am working with mysql-5 and heartbeat-2 in mode 1. Its nearly working.<br>
><br>
> BR<br>
><br>
> Kiste<br>
><br>
> --<br>
><br>
> kiste lat: 54.322684, lon: 10.13586<br>
></p>
</div>
</div>
<div>
<div>
<p>> _______________________________________________<br>
> Users mailing list<br>
> <a href="mailto:Users@lists.opensips.org" target="_blank">Users@lists.opensips.org</a><br>
> <a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users" target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><br>
><br>
<br>
_______________________________________________<br>
Users mailing list<br>
<a href="mailto:Users@lists.opensips.org" target="_blank">Users@lists.opensips.org</a><br>
<a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users" target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a></p>
</div>
</div>
</div>
<p> </p>
</div>
</div>
<p style="margin-bottom: 12pt;"><br>
_______________________________________________<br>
Users mailing list<br>
<a href="mailto:Users@lists.opensips.org" target="_blank">Users@lists.opensips.org</a><br>
<a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users" target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a></p>
</div>
<p> </p>
</div></div></div>
</div>
<br>_______________________________________________<br>
Users mailing list<br>
<a href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a><br>
<a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users" target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><br>
<br></blockquote></div><br>