all-in-one/docker-ipv6-support.md

IPv6-Support for Docker

Docker on Linux and Docker-rootless

First of all upgrade your docker installation to v27.0.1 or higher.

1. Then edit /etc/docker/daemon.json (or ~/.config/docker/daemon.json in case of docker-rootless), add the below json:

   {
     "default-network-opts": {"bridge":{"com.docker.network.enable_ipv6":"true"}}
   }
   

   Save the file.

2. Reload the Docker configuration file.

   sudo systemctl restart docker
   

3. Make sure that ipv6 is enabled for the internal nextcloud-aio network by running sudo docker network inspect nextcloud-aio | grep EnableIPv6. On a new instance, this command should return that it did not find a network with this name. Then you can run sudo docker network create nextcloud-aio in order to create the network with ipv6-support. However if it finds the network and its value EnableIPv6 is set to false, make sure to follow https://github.com/nextcloud/all-in-one/discussions/4989 in order to recreate the network and enable ipv6 for it.

Docker Desktop (Windows and macOS)

First of all upgrade your docker desktop installation to v4.32.0 or higher. Then, on Windows and macOS which use Docker Desktop, you need to go into the settings, and select Docker Engine. There you should see the currently used daemon.json file.

1. You need to now adjust this json file:

   "default-network-opts": {"bridge":{"com.docker.network.enable_ipv6":"true"}}
   

2. Add these values to the json and make sure to keep the other currently values and that you don't see Unexpected token in JSON at position ... before attempting to restart by clicking on Apply & restart.

3. Make sure that ipv6 is enabled for the internal nextcloud-aio network by running sudo docker network inspect nextcloud-aio | grep EnableIPv6. On a new instance, this command should return that it did not find a network with this name. Then you can run sudo docker network create nextcloud-aio in order to create the network with ipv6-support. However if it finds the network and its value EnableIPv6 is set to false, make sure to follow https://github.com/nextcloud/all-in-one/discussions/4989 in order to recreate the network and enable ipv6 for it.

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Note: This is a copy of the original docker docs at https://docs.docker.com/config/daemon/ipv6/ which apparently are not correct. However experimental is set to true which the ip6tables feature needs. Thus it will not get included into the official docs. However it is needed to make it work in our testing.