[Feature Request] IPv6 support

[blixten85]

Feature request

IPv6 support

Describe the solution you'd like
IPv6 support added in the network config for docker.
It shouldn't require much to implement. Perhaps a question popped during install if ipv6 support is desired, or within the ds application.

[blixten85]

For those who want to add this meanwhile we wait

sudo nano /etc/docker/daemon.json

{
  "ipv6": true,
  "fixed-cidr-v6": "fd00::/64",
  "experimental": true,
  "ip6tables": true,
  "default-address-pools": [
    { "base": "172.17.0.0/16", "size": 16 },
    { "base": "172.18.0.0/16", "size": 16 },
    { "base": "172.19.0.0/16", "size": 16 },
    { "base": "172.20.0.0/14", "size": 16 },
    { "base": "172.24.0.0/14", "size": 16 },
    { "base": "172.28.0.0/14", "size": 16 },
    { "base": "192.168.0.0/16", "size": 20 },
    { "base": "fd00::/104", "size": 112 }
  ]
}

nano ~/.docker/compose/docker-compose.override.yml

networks:
  default:
    name: compose_default
    enable_ipv6: true
    ipam:
      driver: default
      config:
        - subnet: 172.18.0.0/16
          gateway: 172.18.0.1
        - subnet: fd01::/64
          gateway: fd01::1

ds -c down
sudo reboot
ds -c down
ds -c p
ds -c up

These commands, in this order should do the trick.
The reason why you want to reboot is because the network might still be in use and not fully shutdown, after the reboot is done make sure the compose_default network is down with ds -c down and then ds -c p to prune all the containers including the network.
Rebuild everything and bring it back up again with the ds -c up command.

Add the following to the container you want ipv6 to be working for.
This goes into ~/.docker/compose/docker-compose.override.yml file.

    sysctls:
      - net.ipv6.conf.all.disable_ipv6=0
      - net.ipv6.conf.eth0.proxy_ndp=1

i.e (full copy off my gluetun container with network added)

services:
  gluetun:
    cap_add:
      - NET_ADMIN
    devices:
      - /dev/net/tun:/dev/net/tun
    ports:
     - ${QBITTORRENT_PORT_51413}:51413
     - ${QBITTORRENT_PORT_51413}:51413/udp
     - ${QBITTORRENT_PORT_6881}:6881
     - ${QBITTORRENT_PORT_6881}:6881/udp
     - ${QBITTORRENT_PORT_8080}:8080
     - ${AUTOBRR_PORT_7474}:7474
    environment:
      - VPN_SERVICE_PROVIDER=custom
      - VPN_TYPE=wireguard
      - OPENVPN_USER=username
      - OPENVPN_PASSWORD=password
      - OPENVPN_CUSTOM_CONFIG=/config/wg0.conf
      - DOT=on
      - BLOCK_ADS=on
      - BLOCK_MALICIOUS=on
      - BLOCK_SURVEILLANCE=on
      - VPN_ENDPOINT_IP=94.254.51.197
      - VPN_ENDPOINT_PORT=48575
      - WIREGUARD_PUBLIC_KEY=public_hash_key
      - WIREGUARD_PRIVATE_KEY=private_hash_key
      - WIREGUARD_PRESHARED_KEY=
      - WIREGUARD_ADDRESSES=10.0.66.115/24,fdab:1337:1337:66::115/64
      - WIREGUARD_ALLOWED_IPS=0.0.0.0/0,::/0
    sysctls:
      - net.ipv6.conf.all.disable_ipv6=0
      - net.ipv6.conf.eth0.proxy_ndp=1

networks:
  default:
    name: compose_default
    enable_ipv6: true
    ipam:
      driver: default
      config:
        - subnet: 172.18.0.0/16
          gateway: 172.18.0.1
        - subnet: fd01::/64
          gateway: fd01::1