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Thanks for sharing!

How did you set up PowerDNS? Single/multiple instances? One DB shared by many or multiple authoritative with one hidden primary?

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There are multiple multiples :) both (hidden) primary and secondaries are multiple, snapshots every 20 minutes and forward-update functionality from the secondaries with replicated tsig over powerdns api every 120 seconds. since they are static they only need to replicate once.

if you register a zone and open the snippets quickly, there is a green notification saying tsig replication underway for x amount of seconds and until that happens RFC 2136 updates are not possible but the ones that use api are available right off the bat.

Cool! How did you scale-out the hidden primary? Multiple instances communicating with a single postgres?

The hidden primary has a passive node, so saying multiple multiple maybe is an overstatement :) and yes, using a single postgres container

Really cool stuff. Out of curiosity what made you select PowerDNS (and in general a commodity DNS server) vs. developing a custom DNS server integrating your logic (using https://github.com/miekg/dns for instance).

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