5 ms·
No, they don’t. They aren’t coupled today, and applications implementing Happy Eyeballs work perfectly fine on top of sockets and a DNS client.
by drdexebtjl 3mo ago
No, they don’t. They aren’t coupled today, and applications implementing Happy Eyeballs work perfectly fine on top of sockets and a DNS client.
- cyberax 3mo agoWell, yeah. And I also can do IPv6 without any of these new-fangled application-level TCP by using raw sockets. War story: many years ago I was developing a service that runs computational tasks inside containers. That was when K8s didn't work well with cloud providers. The service was written in Go and worked on AWS. Everything worked fine for me and for our production deployment. Then people started using it with a Python client that used the REST API directly, and for some reason some people couldn't reach it when they were working from home. Reason: I misconfigured IPv6 on AWS by not enabling the default route, so all IPv6 connections were failing. Go has HappyEyeballs enabled by default, so it worked just fine. But Python did not have it back then. So people with IPv4-only connectivity (including our office) had no problems. But people with IPv6 were getting connection failures.