add netboot-installer-nixos-unstable

flake.lock

@@ -1,5 +1,23 @@
 {
   "nodes": {
+    "disko": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1683508929,
+        "narHash": "sha256-AqkIrwewCL8+zlkqhNxheF+kOfyakzZDk43SqRTIqRE=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "2a59f5cf641607dbecb0cfec3ae32247e4aeb311",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
     "nixos-2211": {
       "locked": {
         "lastModified": 1684141842,
@@ -32,8 +50,25 @@
         "type": "github"
       }
     },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1683442750,
+        "narHash": "sha256-IiJ0WWW6OcCrVFl1ijE+gTaP0ChFfV6dNkJR05yStmw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "eb751d65225ec53de9cf3d88acbf08d275882389",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
+        "disko": "disko",
         "nixos-2211": "nixos-2211",
         "nixos-unstable": "nixos-unstable"
       }

flake.nix

@@ -3,6 +3,7 @@
 
   inputs.nixos-unstable.url = "github:NixOS/nixpkgs/nixos-unstable-small";
   inputs.nixos-2211.url = "github:NixOS/nixpkgs/release-22.11";
+  inputs.disko.url = "github:nix-community/disko";
 
   nixConfig.extra-substituters = [
     "https://cache.garnix.io"
@@ -11,13 +12,14 @@
     "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
   ];
 
-  outputs = { self, nixos-unstable, nixos-2211 }: let
+  outputs = { self, nixos-unstable, nixos-2211, disko }: let
     supportedSystems = [ "aarch64-linux" "x86_64-linux" ];
     forAllSystems = nixos-unstable.lib.genAttrs supportedSystems;
   in {
     packages = forAllSystems (system: let
       netboot = nixpkgs: (import (nixpkgs + "/nixos/release.nix") {}).netboot.${system};
       kexec-installer = nixpkgs: modules: (nixpkgs.legacyPackages.${system}.nixos (modules ++ [self.nixosModules.kexec-installer])).config.system.build.kexecTarball;
+      netboot-installer = nixpkgs: (nixpkgs.legacyPackages.${system}.nixos [self.nixosModules.netboot-installer]).config.system.build.netboot;
     in {
       netboot-nixos-unstable = netboot nixos-unstable;
       netboot-nixos-2211 = netboot nixos-2211;
@@ -32,10 +34,15 @@
         { system.kexec-installer.name = "nixos-kexec-installer-noninteractive"; }
         self.nixosModules.noninteractive 
       ];
+
+      netboot-installer-nixos-unstable = netboot-installer nixos-unstable;
+      netboot-installer-nixos-2211 = netboot-installer nixos-2211;
     });
     nixosModules = {
       kexec-installer = ./nix/kexec-installer/module.nix;
       noninteractive = ./nix/noninteractive.nix;
+      # TODO: also add a test here once we have https://github.com/NixOS/nixpkgs/pull/228346 merged
+      netboot-installer = ./nix/netboot-installer/module.nix;
     };
     checks.x86_64-linux = let
       pkgs = nixos-unstable.legacyPackages.x86_64-linux;

nix/netboot-installer/module.nix

@@ -0,0 +1,55 @@
+{ config, lib, modulesPath, pkgs, ... }:
+{
+  imports = [
+    (modulesPath + "/installer/netboot/netboot-minimal.nix")
+    ../installer.nix
+  ];
+
+  # We are stateless, so just default to latest.
+  system.stateVersion = config.system.nixos.version;
+
+  system.build.netboot = pkgs.symlinkJoin {
+    name = "netboot";
+    paths = with config.system.build; [
+      netbootRamdisk
+      kernel
+      (pkgs.runCommand "kernel-params" {} ''
+        mkdir -p $out
+        ln -s "${config.system.build.toplevel}/kernel-params" $out/kernel-params
+        ln -s "${config.system.build.toplevel}/init" $out/init
+      '')
+    ];
+    preferLocalBuild = true;
+  };
+  systemd.network.networks."10-uplink" = {
+    matchConfig.Type = "ether";
+    networkConfig = {
+      DHCP = "yes";
+      LLMNR = "yes";
+      EmitLLDP = "yes";
+      IPv6AcceptRA = "no";
+      MulticastDNS = "yes";
+      LinkLocalAddressing = "yes";
+      LLDP = "yes";
+    };
+
+    dhcpV4Config = {
+      UseHostname = false;
+      ClientIdentifier = "mac";
+    };
+  };
+
+  networking.hostName = "";
+  # overrides normal activation script for setting hostname
+  system.activationScripts.hostname = lib.mkForce ''
+    # apply hostname from cmdline
+    for o in $(< /proc/cmdline); do
+      case $o in
+        hostname=*)
+          IFS== read -r -a hostParam <<< "$o"
+          ;;
+      esac
+    done
+    hostname "''${hostParam[1]:-nixos}"
+  '';
+}