Add configs for a new kubernetes cluster on NixOS.

nix/kubernetes/formats/installer.nix

@@ -0,0 +1,74 @@
+{
+  config,
+  pkgs,
+  lib,
+  modulesPath,
+  targetSystem,
+  ...
+}:
+let
+  installer = pkgs.writeShellApplication {
+    name = "installer";
+    runtimeInputs = with pkgs; [
+      # clevis
+      dosfstools
+      e2fsprogs
+      gawk
+      nixos-install-tools
+      util-linux
+      config.nix.package
+    ];
+    text = ''
+      set -euo pipefail
+
+      ${targetSystem.config.system.build.diskoScript}
+
+      nixos-install --no-channel-copy --no-root-password --option substituters "" --system ${targetSystem.config.system.build.toplevel}
+    '';
+  };
+  installerFailsafe = pkgs.writeShellScript "failsafe" ''
+    ${lib.getExe installer} || echo "ERROR: Installation failure!"
+    sleep 3600
+  '';
+in
+{
+  imports = [
+    (modulesPath + "/installer/cd-dvd/iso-image.nix")
+    (modulesPath + "/profiles/all-hardware.nix")
+  ];
+
+  # boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux_6_17;
+  # boot.zfs.package = pkgs.zfs_unstable;
+  boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux;
+  boot.kernelParams = [
+    "quiet"
+    "systemd.unit=getty.target"
+  ];
+  boot.supportedFilesystems.zfs = true;
+  boot.initrd.systemd.enable = true;
+
+  networking.hostId = "04581ecf";
+
+  isoImage.makeEfiBootable = true;
+  isoImage.makeUsbBootable = true;
+  isoImage.squashfsCompression = "zstd -Xcompression-level 15";
+
+  environment.systemPackages = [
+    installer
+  ];
+
+  systemd.services."getty@tty1" = {
+    overrideStrategy = "asDropin";
+    serviceConfig = {
+      ExecStart = [
+        ""
+        installerFailsafe
+      ];
+      Restart = "no";
+      StandardInput = "null";
+    };
+  };
+
+  # system.stateVersion = lib.mkDefault lib.trivial.release;
+  system.stateVersion = "24.11";
+}

nix/kubernetes/formats/iso.nix

@@ -0,0 +1,36 @@
+{
+  config,
+  lib,
+  modulesPath,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/installer/cd-dvd/iso-image.nix")
+  ];
+
+  config = {
+    isoImage.makeEfiBootable = true;
+    isoImage.makeUsbBootable = true;
+
+    networking.dhcpcd.enable = true;
+    networking.useDHCP = true;
+
+    me.buildingPortable = true;
+    me.disko.enable = true;
+    me.disko.offline.enable = true;
+    me.mountPersistence = lib.mkForce false;
+    # me.optimizations.enable = lib.mkForce false;
+
+    # Not doing image_based_appliance because this might be an install ISO, in which case we'd need nix to do the install.
+    # me.image_based_appliance.enable = true;
+
+    # TODO: Should I use this instead of doing a mkIf for the disk config?
+    # disko.enableConfig = false;
+
+    # Faster image generation for testing/development.
+    isoImage.squashfsCompression = "zstd -Xcompression-level 15";
+  };
+}

nix/kubernetes/formats/sd.nix

@@ -0,0 +1,32 @@
+{
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/installer/sd-card/sd-image.nix")
+  ];
+
+  config = {
+    isoImage.makeEfiBootable = true;
+    isoImage.makeUsbBootable = true;
+
+    boot.loader.grub.enable = false;
+    boot.loader.generic-extlinux-compatible.enable = true;
+
+    # TODO: image based appliance?
+
+    # TODO: Maybe this?
+    # fileSystems = {
+    #   "/" = {
+    #     device = "/dev/disk/by-label/NIXOS_SD";
+    #     fsType = "ext4";
+    #     options = [
+    #       "noatime"
+    #       "norelatime"
+    #     ];
+    #   };
+    # };
+  };
+}

nix/kubernetes/formats/toplevel.nix

@@ -0,0 +1 @@
+{ }

nix/kubernetes/formats/vm_iso.nix

@@ -0,0 +1,22 @@
+{
+  lib,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/installer/cd-dvd/iso-image.nix")
+    (modulesPath + "/profiles/qemu-guest.nix") # VirtIO kernel modules
+  ];
+
+  config = {
+    isoImage.makeEfiBootable = true;
+    isoImage.makeUsbBootable = true;
+
+    networking.dhcpcd.enable = true;
+    networking.useDHCP = true;
+
+    me.image_based_appliance.enable = true;
+  };
+}