[Pdns-users] listen on net iface

Brian Candler b.candler at pobox.com
Fri Jul 28 09:44:24 UTC 2023

On 28/07/2023 10:07, Klaus Darilion via Pdns-users wrote:
> PS: This sound like you want to run PDNS in an active-standby HA-setup with a "hot" standby

If it were me, I'd have a pair of dnsdist instances (with the floating 
IP moving between those), which in turn point to the real servers behind.

This has a number of advantages:

- active-active operation (load-sharing)
- can scale to more than 2 back-end servers
- actively sends test DNS queries to each backend every second, and 
takes unresponsive ones out of the pool
- provides lots of metrics <https://dnsdist.org/statistics.html>
- binding to an interface name instead of IP is apparently supported 

/On recent Linux versions specifying the interface via 
the//|interface|//parameter should work as well./

The issues Klaus raised around master/slave operation still require care 
of course. If you're using native mode with SQL-level replication, 
things may be simpler.
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