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Doesn't this sound a lot like DNS-SD over mDNS?

I think it's centralised, so you don't need to either have all your machines on one subnet or configure your routers (if you can) to forward DNS-SD packets between all your subnets, probably creating a small broadcast storm at scale.

DNS-SD doesn't require mDNS, you can use it with generic DNS servers. There's an example in the RFC, see https://tools.ietf.org/html/rfc6763#section-13.1

But it's usually used with mDNS on a local network.

That's right, it's really just a plain ol DNS server that happens to read its records from Mesos.

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