From 56f42e96f73f4a5af646e6e07a681211a52aa66f Mon Sep 17 00:00:00 2001
From: Stefan Junker <mail@stefanjunker.de>
Date: Sun, 16 Sep 2018 18:21:16 +0200
Subject: [PATCH] nixos-config: add vm-install-iso

---
 nixos-configuration/vm-install-iso/Justfile |  2 +
 nixos-configuration/vm-install-iso/iso.nix  | 92 +++++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 nixos-configuration/vm-install-iso/Justfile
 create mode 100644 nixos-configuration/vm-install-iso/iso.nix

diff --git a/nixos-configuration/vm-install-iso/Justfile b/nixos-configuration/vm-install-iso/Justfile
new file mode 100644
index 0000000..bcd3c66
--- /dev/null
+++ b/nixos-configuration/vm-install-iso/Justfile
@@ -0,0 +1,2 @@
+build:
+  nix-build '<nixpkgs/nixos>' -A config.system.build.isoImage -I nixos-config=iso.nix
diff --git a/nixos-configuration/vm-install-iso/iso.nix b/nixos-configuration/vm-install-iso/iso.nix
new file mode 100644
index 0000000..a93f3d9
--- /dev/null
+++ b/nixos-configuration/vm-install-iso/iso.nix
@@ -0,0 +1,92 @@
+# This module defines a small NixOS installation CD.  It does not
+# contain any graphical stuff.
+{config, pkgs, lib, ...}:
+
+let nixos-init-script = ''
+  #!${pkgs.stdenv.shell}
+
+  export HOME=/root
+  export PATH=${pkgs.lib.makeBinPath [ 
+    config.nix.package pkgs.systemd pkgs.gnugrep pkgs.gnused config.system.build.nixos-rebuild
+    config.system.build.nixos-install pkgs.utillinux pkgs.e2fsprogs pkgs.coreutils pkgs.hdparm
+  ]}:$PATH
+  export NIX_PATH=/nix/var/nix/profiles/per-user/root/channels/nixos:nixos-config=/etc/nixos/configuration.nix:/nix/var/nix/profiles/per-user/root/channels
+
+  set -xe
+
+  fdisk -w always -W always /dev/vda <<EOF
+g
+n
+1
+
++8M
+n
+2
+
++1G
+n
+3
+
+
+t
+1
+4
+w
+EOF
+  lsblk
+
+  mkfs.ext4 -m0 -L nixos /dev/vda3
+  mount -L nixos /mnt
+  mkswap -L swap /dev/vda2
+  swapon -L swap
+
+  mkdir /mnt/etc/nixos -p
+  cp /dev/vdb /mnt/etc/nixos/configuration.nix
+
+  nix-channel --update
+  nixos-install
+  reboot
+  '';
+in {
+  imports = [
+    <nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-minimal-new-kernel.nix>
+
+    # Provide an initial copy of the NixOS channel so that the user
+    # doesn't need to run "nix-channel --update" first.
+    # <nixpkgs/nixos/modules/installer/cd-dvd/channel.nix>
+  ];
+
+  isoImage.isoName = lib.mkForce "${config.isoImage.isoBaseName}-${pkgs.stdenv.hostPlatform.system}.iso";
+  boot.loader.timeout = lib.mkForce 0;
+  boot.postBootCommands = ''
+  '';
+
+  environment.systemPackages = [];
+
+  users.users.root = {
+    openssh.authorizedKeys.keys = [ "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC4RFtHz0sE5y0AyZZm/tH7bBBgsx55gLPt5tGsl9yZlOzih6n4qbJE/9OOdwnOY2AHRe2lrlTekbW5ewWSBBCbiBE3Vux86sLgy7LM9zoKaNC+E3hmxaoS9SExn0BTkb3kNlOcj2k6UyJhkZWEsqVMV5C21R8EWmMlLY/qm3AxptNjOyzKDwNX2zlHZ5IyjgzO4ZjIxjawmJlUrVEn7/m+M7qK3I1Tyg/ZvDSfmxVJS97sVzseYE0rVwLEWJQOnHh0wnfl27smr2McAB7Cy6sxKyPKvEGyXbNqqb8fqk4okZlRRxhq/XkKlC7IZr+uqYxlL4HN8vjkTRNlgenDUSVT cardno:000604870382" ];
+  };
+
+  services.gpm.enable = true;
+  systemd.services.sshd.wantedBy = lib.mkForce [ "multi-user.target" ];
+
+  systemd.services.nixos-init = {
+    script = nixos-init-script;
+    path = with pkgs; [ ];
+
+    description = "Initialize /dev/vda from configuration.nix found at /dev/vdb";
+    enable = true;
+
+    wantedBy = [ "multi-user.target" ];
+    after = [ "multi-user.target" ];
+    requires = [ "network-online.target" ];
+ 
+    restartIfChanged = false;
+    unitConfig.X-StopOnRemoval = false;
+
+    serviceConfig = {
+      Type = "oneshot";
+      RemainAfterExit = true;
+    };
+  };
+}