[OpenSIPS-Users] Help!! How to do failover of mysql connection

[Pablo Hernan Saro]

"The theory behind SRV is that given a domain name, for instance,
example.com, 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
http://www.zytrax.com/books/dns/ch8/srv.html

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.
What I've just realized is that db_mysql module may not support this...

Pablo

On Tue, Nov 25, 2008 at 12:20 PM, Matteo D'Amato <matteo at ecosma.com> wrote:

>  With SRV, if one box is down will it still get hit or does the DNS only
> send to the one that is up?
>
>
>
>
>
> *From:* users-bounces at lists.opensips.org [mailto:
> users-bounces at lists.opensips.org] *On Behalf Of *Pablo Hernan Saro
> *Sent:* Tuesday, November 25, 2008 8:04 AM
> *To:* Krunal Patel
> *Cc:* users at lists.opensips.org
> *Subject:* Re: [OpenSIPS-Users] Help!! How to do failover of mysql
> connection
>
>
>
> That will not work. Try DNS SRV. Take a look at this link
> http://www.zytrax.com/books/dns/ch8/srv.html
> Hope it helps.
>
> Pablo
>
> On Tue, Nov 25, 2008 at 2:51 AM, Krunal Patel <krunal.lists at gmail.com>
> wrote:
>
> Hi,
>
> is it fine if I use DSN resolver?
> Let me explain in detail:
> I setup a DSN resolver & add A record for mysql servers.
> mysql         A          192.168.1.5
> mysql         A          192.168.1.6
>
> where 192.168.1.5 & 192.168.1.6 are mysql cluster nodes.
>
> So mysql.somedomain.com will point to both servers.
> It will do load balance & failover both.
>
> Please confirm that it will not create any issue.
>
> Thanks,
> Krunal Patel
>
>
>
> On Tue, Nov 25, 2008 at 1:35 AM, Geoffrey Mina <geoffreymina at gmail.com>
> wrote:
>
> This problem has been solved many times.  The absolute most bomb-proof
> MySQL failover solution involves a combination of DRBD  and Linux HA
> (Heart Beat).  The replication model has too many issues IMO.
>
>
>
>
>
> On Sun, Nov 23, 2008 at 9:10 AM, Uwe Kastens <kiste at kiste.org> wrote:
> > Hi Krunal,
> >>     * I am having 2 MySql servers. Lets say 192.168.1.5
> >>       <http://192.168.1.5> & 192.168.1.6 <http://192.168.1.6>
> >>     * Opensips is at 192.168.1.4 <http://192.168.1.4>.
> >>     * I would like to use 192.168.1.6 <http://192.168.1.6> mysql server
> >>       for failover.
> >>     * I mean to say if 192.168.1.5 <http://192.168.1.5> goes down then
> >>       opensips should start to use 192.168.1.6 <http://192.168.1.6>
> >>       mysql server.
> >>
> >
> > I am just on my way to implement the same. At the moment I am planing a
> > kind of Mysql Master - Master together with one VIP for
> > Mysql-opensips-communication. So for your example you will have to
> > mysql-servers. opensips is connection to lets say to 192.168.1.4 which
> > points on one of your mysql-servers. You will need active-active for
> > mysql since opensips will write some information in the database as well.
> >
> >
> > I am working with mysql-5 and heartbeat-2 in mode 1. Its nearly working.
> >
> > BR
> >
> > Kiste
> >
> > --
> >
> > kiste lat: 54.322684, lon: 10.13586
> >
>
> > _______________________________________________
> > Users mailing list
> > Users at lists.opensips.org
> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> >
>
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