HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials - offsite DNS (master and slave) solution

Hi guys,

I've been struggling a while to get my setup working as i like... In the old setup i had 2 webservers with ISPConfig installed on it. Server 2 was the slave DNS for server 1 and viceversa. This was getting a bit out of hand so i needed a new solution.

I've got two servers (vmware instances) with a new linux installation and only bind installed on the two of them. Below is a plan that i've used for this solution to work. Hopefully it can do good for you too.

If you see anything that's off or that could be done better, please respond! I'm always in for a bit finetuning.

Oh yeah, i've used public key authentication for the scp to work...

1. Copy all of the zone files to the primairy DNS

Code:

Webserver 1:



scp /etc/bind/pri.* dns@11.22.33.44:/home/dns/zones



Webserver 2:



scp /etc/bind/pri.* dns@11.22.33.44:/home/dns/zones

2. Import zone files in master dns server and copy the zonelist to the slave server. Add the following line to named.conf to make bind look into the zones.conf file:

Code:

Include /etc/bind/zones.conf

Code:



#/bin/bash

mv /home/dns/zones/pri.* /etc/bind/

rm /home/dns/zonelist

echo > /etc/bind/zones.conf



for a in $(ls /etc/bind/pri.*); do echo ${a#/etc/bind/pri.} >> zonelist; done



for i in `cat /home/dns/zonelist`; do

echo "zone \"$i\" {" >> /etc/bind/zones.conf

echo " type master;" >> /etc/bind/zones.conf

echo " file \"/etc/bind/pri.$i\";" >> /etc/bind/zones.conf

echo "};" >> /etc/bind/zones.conf

echo >> /etc/bind/zones.conf

done



/etc/init.d/bind9 force-reload > /dev/null



scp /home/dns/zonelist dns@11.22.33.44:/home/dns/

3. Import the slave zones on the slave DNS server. add the following line in named.conf to tell bind.

Code:

Include /etc/bind/slave-zones.conf

Code:

echo > /etc/bind/slave-zones.conf

for i in `cat /home/dns/zonelist`; do

echo "zone \"$i\" {" >> /etc/bind/slave-zones.conf

echo " type slave;" >> /etc/bind/slave-zones.conf

echo " file \"slave.$i\";" >> /etc/bind/slave-zones.conf

echo " masters { 11.22.33.44; };" >> /etc/bind/slave-zones.conf

echo " notify no;" >> /etc/bind/slave-zones.conf

echo "};" >> /etc/bind/slave-zones.conf

echo >> /etc/bind/slave-zones.conf

done



/etc/init.d/bind9 force-reload > /dev/null

rm /home/dns/zonelist

You can alltime this with cronjobs :) hopefully it will do good :)

Ok guys, i've been testing a bit and this here isn't working quite yet... I'm having troubles with inserting the zones into the master DNS... I will adjust the code when it does work. If anyone of you got it right, please post it!

*update* I've got it working! above is how i've done it.