Configuring the front-end slaves
Enabling slave-mode, disabling master-mode
Edit the initial
/etc/powerdns/pdns.d/pdns.local.conf we created on the master, and expand (and adjust where needed) it with:
Setting a supermaster.
Open your MySQL-prompt:
mysql --defaults-extra-file=/etc/mysql/debian.cnf powerdns
And add your master to the
supermasters-table. Replace the IP-address
203.0.113.1 with the IP-address of your master (IPv4 or IPv6, depending on where the
NOTIFY is coming in from!), and replace the name with the name of the slave you're currently configuring:
INSERT INTO supermasters (ip, nameserver) VALUES ('203.0.113.1', 'ns2.example.com');
Now, when your master sends a
NOTIFY to this slave for a domain it does not know yet, the slave will automatically add the new zone to its database. No questions asked.
Note: If you remove a zone from the master, it is not automatically cleaned up from the slaves. You will have to figure something out yourself for that.
To activate the changes:
systemctl restart pdns
If it fails, you probably didn't adjust the correct settings in the configuration above.