Five nines with Dnsmasq

submited by

Style Pass

2021-07-22 08:30:04

Your Red Hat account gives you access to your member profile and preferences, and the following services based on your customer status:

Your Red Hat account gives you access to your member profile, preferences, and other services depending on your customer status.

For your security, if you're on a public computer and have finished using your Red Hat services, please be sure to log out.

Five nines, or 99.999% uptime, is considered the "Everest" of high availability. In today's IT world, a business continuity strategy must ensure that an organization maintains essential functions during minor failures, or in the event of a disaster. DNS is in the heart of any network, and having a performant DNS is an integral part of achieving five nines. This blog post will discuss how you can incorporate Dnsmasq in your setup to achieve five nines.

Glibc resolver interface provides some failover mechanisms by default. If we check resolv.conf manual for failover-related options, three options immediately stands out.