Hello,


> Also, has anyone tried using nginx for DNS load balancing in production?

I would not recommend using nginx to load-balance DNS traffic at all.
nginx is just a dumb UDP proxy and I doubt it performs well enough
in a DNS setup.

dnsdist [1] is written with this purpose in mind and used in huge DNS
deployments. I suggest you consider that one over nginx for your DNS
needs.


cheers,
l

[1] https://dnsdist.org/
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