pxe boot in flake

client/facts/facts.go

@@ -7,6 +7,8 @@ import (
 	"github.com/zcalusic/sysinfo"
 )
 
+const APIVersion string = "facts/v1alpha1"
+
 type FactsResponse struct {
 	APIVersion  string                  `json:"apiVersion"`
 	CPUInfo     sysinfo.CPU             `json:"cpu"`
@@ -24,7 +26,7 @@ func GetFacts(next http.Handler) http.Handler {
 
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		resp := FactsResponse{
-			APIVersion:  "v1",
+			APIVersion:  APIVersion,
 			CPUInfo:     si.CPU,
 			BoardInfo:   si.Board,
 			DeviceInfo:  si.Product,

flake.nix

@@ -64,6 +64,51 @@
             })
           ];
         };
+          boot-env-pxe = let
+            systemConfig = nixpkgs.lib.nixosSystem {
+              inherit system;
+              modules = [
+                ({modulesPath, ...}: {
+                  imports = [
+                    (modulesPath + "/installer/netboot/netboot-minimal.nix")
+                  ];
+                  system.stateVersion = "25.05";
+
+                  boot.initrd.kernelModules = ["hv_vmbus" "hv_storvsc"]; # Hyper-V Support
+
+                  # Disable unneeded features
+                  ##boot.loader.grub.enable = true; # Not needed as iso-image.nix in modulesPath defines these and cause conflict 
+                  ##boot.loader.grub.device = "nodev";
+                  documentation.enable = false;
+                  fonts.fontconfig.enable = false;
+                  services.udisks2.enable = false;
+
+                  networking.firewall.enable = false; # Technically we COULD use the firewall, but given that this is a network-dependent, one-time-use service, it would cause more issues
+                  
+                  services.getty.autologinUser = nixpkgs.lib.mkForce "root";
+
+                  environment.systemPackages = [ clientPackage ];
+                  environment.etc."profile.local".text = ''
+                    client
+                  '';
+                })
+              ];
+            }; in pkgs.stdenv.mkDerivation {
+              name = "boot-env-pxe";
+              buildCommand = ''
+                mkdir -p $out
+                cp -r ${systemConfig.config.system.build.kernel}/bzImage $out/kernel
+                cp -r ${systemConfig.config.system.build.netbootRamdisk} $out/initrd
+                cat <<EOF > $out/boot.ipxe
+                #!ipxe
+
+                imgfree
+                kernel http://127.0.0.1:8081/kernel init=${systemConfig.config.system.build.toplevel}/init initrd=initrd ${toString systemConfig.config.boot.kernelParams} ''${cmdline}
+                initrd http://127.0.0.1:8081/initrd
+                boot
+                EOF
+              '';
+            };
         });
 
         apps = forAllSystems (system: