Highly available DNS recursion with PowerDNS
summary
A highly available DNS cluster built with PowerDNS DNSdist in front of multiple PowerDNS Recursors and an authoritative backend uses a keepalived VIP for a single stable IP, forwarding rules for AWS and internal zones, and an Ansible role to deploy it; it handles very low TTLs (~5s) and client failover quirks and the real deployment for a media platform reduced outages from once a week to zero, proving the combination of DNSdist load balancing, recursor caching/forwarding, and VIP failover works in production.
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chapters (4)
- 0:00Start
- 0:45The Problem
- 3:46DNS Dist • Loed balancing DNS proxy • Working example for below role
- 5:02Forward Zones file
