Docker

Enable IPv6 for docker daemon

Fill this to your /etc/docker/daemon.json:

{
    "ipv6": true,
    "fixed-cidr-v6": "fd00:ffff::/80",
    "ip6tables": true,
    "experimental": true
}

You can choose your own prefix instead of fd00:ffff::/80 but /80 is recommended as minimum.

And restart the docker daemon:

systemctl restart docker

And test it:

docker run --rm -t busybox ping6 -c 4 google.com

Enable IPv6 in your docker-compose

Add to your docker-compose.yml:

version: '2.4'

services:
  servicename:
  ...
    networks:
      - servicenetwork
networks:
  servicenetwork:
    name: servicenetwork
    enable_ipv6: true
    ipam:
      config:
        - subnet: fd00:a::/80

The subnet needs to be different from the one used in docker daemon configuration.

docker-compose up -d