7.0: BIND DNS

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7.0: BIND DNS

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