IPv6 / connectivity issues

[steersbob]

https://medium.com/@skleeschulte/how-to-enable-ipv6-for-docker-containers-on-ubuntu-18-04-c68394a219a2

https://www.cyberciti.biz/faq/linux-show-dropped-packets-per-interface-command/

https://stackoverflow.com/questions/59787464/docker-swarm-restart-all-containers-on-host-periodically

systemd/systemd#3374

moby/libnetwork#2380

https://docs.docker.com/config/daemon/ipv6/

moby/moby#38203

sudo sed -i "/net.ipv6.*.disable_ipv6 = 1/d" /etc/sysctl.conf

docker/for-linux#914

[jpaarhuis]

Hey @steersbob, I see you linked to moby/moby#38203. I'm facing this exact same issue. Is ipv6 the solution to avoid service restarts on the node?

[jpaarhuis]

Nvm, found a potential solution here, might help you as well. moby/moby#36311

[steersbob]

@jpaarhuis Probably. We can reproduce the problem, and the problem goes away when IPv6 is enabled per https://docs.docker.com/config/daemon/ipv6/. This doesn't mean I can confidently say I understand the issue and its solution.

Edit: to be explicit, we are running a docker-compose environment - not swarm.

[jpaarhuis]

Ok, we do run swarm and it seems like a specific issue to swarm. We're trying out this solution now: moby/moby#36311.

[steersbob]

Editing the docker daemon config seems to consistently fix the issue on all supported platforms. Closing this issue now.