1 files changed, 57 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/virtualisation/docker-image.nix b/nixpkgs/nixos/modules/virtualisation/docker-image.nix
new file mode 100644
index 00000000000..baac3a35a78
--- /dev/null
+++ b/nixpkgs/nixos/modules/virtualisation/docker-image.nix
@@ -0,0 +1,57 @@
+{ ... }:
+
+{
+  imports = [
+    ../profiles/docker-container.nix # FIXME, shouldn't include something from profiles/
+  ];
+
+  boot.postBootCommands =
+    ''
+      # Set virtualisation to docker
+      echo "docker" > /run/systemd/container
+    '';
+
+  # Iptables do not work in Docker.
+  networking.firewall.enable = false;
+
+  # Socket activated ssh presents problem in Docker.
+  services.openssh.startWhenNeeded = false;
+}
+
+# Example usage:
+#
+## default.nix
+# let
+#   nixos = import <nixpkgs/nixos> {
+#     configuration = ./configuration.nix;
+#     system = "x86_64-linux";
+#   };
+# in
+# nixos.config.system.build.tarball
+#
+## configuration.nix
+# { pkgs, config, lib, ... }:
+# {
+#   imports = [
+#     <nixpkgs/nixos/modules/virtualisation/docker-image.nix>
+#     <nixpkgs/nixos/modules/installer/cd-dvd/channel.nix>
+#   ];
+#
+#   documentation.doc.enable = false;
+#
+#   environment.systemPackages = with pkgs; [
+#     bashInteractive
+#     cacert
+#     nix
+#   ];
+# }
+#
+## Run
+# Build the tarball:
+# $ nix-build default.nix
+# Load into docker:
+# $ docker import result/tarball/nixos-system-*.tar.xz nixos-docker
+# Boots into systemd
+# $ docker run --privileged -it nixos-docker /init
+# Log into the container
+# $ docker exec -it <container-name> /run/current-system/sw/bin/bash