.internal DNS occasionally stops working for some apps?

[thomas]

Just a quick update:

DNS query to regions not always valid

I seem to just be having DNS related issues lately. Alongside .internal DNS occasionally stops working for some apps? I am now having issues with the TXT record for regions.<app-name>.internal. So I have a nats cluster set up using the nats guide: Global NATS Cluster · Fly Docs Which was working fine for a while. I have this set up only in dev at the moment so I’m not sure when it broke, but coming back to it today, it was not working. The logs are spamming these lines constantly: 2022-07-15…

We believe we’ve isolated this problem to a particular pair host worker hosts in our network that somehow briefly had colliding IP addresses in our WireGuard mesh.