How'd you go getting docker + IPv6 going? I spent hours trying to get docker containers to get native IPv6 IPs and eventually gave up because it was to painful.
I feel for you. I also wasted a lot of very painful hours trying to get it to work. I even had it working for a while before a docker update broke it -- turns out docker-compose's ipv6 support that many people relied on for years was a "bug" that they "fixed".
Ultimately I also gave up and now have a combination of port forwarding, nat64, and 10+ socat proxies in my docker-compose file. (Specifically, intranet->container and container->intranet are ipv6; but container->container is still ipv4)
More generally, I now try to keep my docker host as stock as possible. Whenever I'm reaching for daemon.json I just catch myself, take a step back, and say "what's the stupid but easy way to get this working".
Honestly tempted to ditch docker-compose in favour of just a bunch of LXC/LCD containers in place. Sure, I mightn't have all the nice networking but damn each container getting internet-routable IPv6 address is just damn nice.
Why? All you have to do is add a prefix to both the docker daemon and individual networks configured by compose. I do it and it's painless, never hit a bug. Just ensure the prefixes are at least /112.
Ultimately I also gave up and now have a combination of port forwarding, nat64, and 10+ socat proxies in my docker-compose file. (Specifically, intranet->container and container->intranet are ipv6; but container->container is still ipv4)
More generally, I now try to keep my docker host as stock as possible. Whenever I'm reaching for daemon.json I just catch myself, take a step back, and say "what's the stupid but easy way to get this working".