Possiblity to add new records to a slave server

arash_gh · 07-27-2016, 09:50 PM

Hi ;
I want to implement a DNS cluster of two Debian 8 servers with BIND9 , so they would act as backup of each other in the case of failure . I implemented a Master/Slave solution and enabled and successfully transferred zone from Master to Slave . But i have a little problem and it is that : How am i able to add new records when Master is not reachable? `cause i tested and conclude that Slave would deny requests from clients for new records thus not able to query new records added to Slave.

tnx in advance

catkin · 07-28-2016, 12:02 PM

One way would be to prepare the slave for becoming the master. You could periodically synchronise (rsync would be a good choice) the master's /etc/bind/ to the slave as, say, /etc/bind.master/ Then, if the master goes down you could, on the slave:

Stop service bind9
Rename /etc/bind/ as /etc/bind.slave/
Rename /etc/bind.master/ as /etc/bind/
Start service bind9

I have not tested the technique so there may be some unforseen glitches to be identified by testing,

Habitual · 07-28-2016, 12:52 PM

I rsync'd from master to slave once.
Couple of minor edits and bingo.