How do I setup round robin DNS?

Round Robin DNS (Domain Name System) is a load balancing technique that allows you to distribute traffic across multiple servers by returning multiple IP addresses for a single domain name in a rotating order. This can help improve the availability and performance of your website or service by distributing the load among multiple servers.

To set up Round Robin DNS, you need to have access to a DNS server and the ability to create and modify DNS records. The specific steps to set up Round Robin DNS depend on the DNS server software and the configuration method you are using. Here is a general overview of the process:

1. Determine the IP addresses of the servers you want to use for Round Robin DNS. You can use the "ip" or "ifconfig" command to find the IP address of a server.

2. Create DNS "A" records for the domain name you want to use with Round Robin DNS. An "A" record maps a domain name to an IP address. For example:

example.com.  A  10.0.0.1
example.com.  A  10.0.0.2

This will create two "A" records for the "example.com" domain, pointing to the IP addresses "10.0.0.1" and "10.0.0.2".

3. Set the time to live (TTL) for the "A" records to a low value. The TTL determines how long the DNS record will be cached by DNS resolvers before it is refreshed. A low TTL can help ensure that the Round Robin DNS rotation is effective. For example:

example.com.  A  10.0.0.1  3600
example.com.  A  10.0.0.2  3600

This will set the TTL for the "A" records to 3600 seconds (1 hour).

4. Save the DNS records and refresh the DNS cache on the DNS server. Consult the documentation of your DNS server software for specific instructions on how to do this.

With these steps, you should be able to set up Round Robin DNS for a domain name. Consult the documentation of your DNS server software and the domain registrar for more information on how to create and modify DNS records.