7.0: BIND DNS
3.0: Initialization LDAP Database
5.0: Heartbeat HA Configuration
Table of Contents
We can use BIND – The Berkley Internet Name Domain in a high availability configuration. We can make 2 nodes appear as one, zone files will we stored on a DRBD drive, if node1 fails node2 can take over and automatically start NAMED.
BIND is able to have its /var/named directory relocated to a more appropriate location such as /data/dnszones; this enables us to provide real time replication of the zone files; the standby node2 will have to have its default directory modified to /data/dnszones.
We have 2 servers, and we will refer to the cluster as cluster.differentialdesign.org. It is assumed that these machines are behind a firewall with NAT and port forwarding to the appropriate ports.
When setting up Domain Names through a registrar you would want 2 separate name servers. It is recommended to setup an additional slave DNS server.
An example may be
Name Server:CLUSTER.DIFFERENTIALDESIGN.ORG <- Primary Name Server(s)
Name Server:NS1.DIFFERENTIALDESIGN.ORG
Name Server:NS2.DIFFERENTIALDESIGN.ORG