DNS Cluster
Overview
(WHM >> Home >> Clusters >> DNS Cluster)A DNS cluster is a group of nameservers that share records, which allows you to physically separate nameservers that handle the DNS requests from your web servers. This interface allows you to configure a DNS cluster and add servers to an existing DNS cluster.
DNS cluster requirements
To configure your DNS cluster, you must meet the following minimum requirements:
- Clusters must include at least two servers.
- You must have at least one web server with cPanel & WHM installed. A DNS cluster that includes multiple cPanel DNSONLY servers and cPanel & WHM servers is also acceptable.
- All machines in the DNS cluster must have cPanel & WHM or cPanel DNSONLY version 11 or higher installed. Some features may not work with older versions of cPanel & WHM.
- All machines configured with PowerDNS must have DNSSEC disabled.
Notes:
- WHM's DNS Cluster feature only provides redundancy for DNS. It does not add Apache or any other services to a DNS cluster configuration.
- If you set a server in a DNS cluster to the write-only role, WHM will not check whether a DNS zone exists before you create an account. Because of this, it is possible to create the same domain name on two or more of these servers. If this occurs, the servers compete for updates to that domain.
- cPanel DNSONLY software allows you to run a dedicated physical nameserver. It is essentially the "bare-bones" version of cPanel & WHM, which only replicates DNS zones to your other servers. Only install cPanel DNSONLY on nameservers that have no previous content on them. You can download the cPanel DNSONLY software for free.