From 4b628fee5dd1ac1076666b9348558fda4132d60d Mon Sep 17 00:00:00 2001
From: Daniel Langbein <daniel@systemli.org>
Date: Tue, 10 Oct 2023 17:21:41 +0200
Subject: [PATCH] docs: Docker IPv6

---
 modules/docker.nix | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/modules/docker.nix b/modules/docker.nix
index b0da037..89e8cb7 100644
--- a/modules/docker.nix
+++ b/modules/docker.nix
@@ -12,6 +12,21 @@
       # As we use btrfs, we enable the according storageDriver option.
       storageDriver = "btrfs";
 
+      # IPv6 support.
+      # https://search.nixos.org/options?channel=23.05&show=virtualisation.docker.daemon.settings
+      # https://docs.docker.com/config/daemon/ipv6/#use-ipv6-for-the-default-bridge-network
+      # TODO: See notes in Jinja-Compose/proxy.yml.jinja2 why this is not yet ready to use.
+#      daemon.settings = {
+#        # Enable IPv6 networking on the default network.
+#        ipv6 = true;
+#        # Assign a subnet to the default bridge network, enabling dynamic IPv6 address allocation.
+#        fixed-cidr-v6 = "2001:db8:1::/64";
+#        # Enable additional IPv6 packet filter rules, providing network isolation and port mapping.
+#        # This parameter requires experimental to be set to `true`.
+#        ip6tables = true;
+#        experimental = true;
+#      };
+
       # Run `docker system prune -f ${autoPrune.flags}` every week.
       autoPrune.enable = true;
       autoPrune.dates = "weekly";