add ursa-major

flake.nix

@@ -43,5 +43,12 @@
             ./ursa-minor/configuration.nix
           ];
         };
+      nixosConfigurations.ursa-major = nixpkgs.lib.nixosSystem
+        {
+          system = "aarch64-linux";
+          modules = [
+            ./ursa-major/configuration.nix
+          ];
+        };
     };
 }

ursa-major/configuration.nix

@@ -0,0 +1,171 @@
+# Edit this configuration file to define what should be installed on
+# your system. Help is available in the configuration.nix(5) man page, on
+# https://search.nixos.org/options and in the NixOS manual (`nixos-help`).
+
+{ config, lib, pkgs, ... }:
+
+{
+  imports =
+    [
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+  nixpkgs.config.allowUnfree = true;
+
+  # Use the extlinux boot loader. (NixOS wants to enable GRUB by default)
+  boot.loader.grub.enable = false;
+  # Enables the generation of /boot/extlinux/extlinux.conf
+  boot.loader.generic-extlinux-compatible.enable = true;
+
+  # For k3s
+  boot.kernel.sysctl = { "net.ipv4.ip_forward" = 1; };
+  boot.kernelParams = [
+    "cgroup_enable=cpuset"
+    "cgroup_memory=1"
+    "cgroup_enable=memory"
+  ];
+
+  networking.hostName = "ursa-major"; # Define your hostname.
+  # Pick only one of the below networking options.
+  networking.wireless.enable = true; # Enables wireless support via wpa_supplicant.
+  # networking.networkmanager.enable = true;  # Easiest to use and most distros use this by default.
+
+  # Set your time zone.
+  time.timeZone = "America/New_York";
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+  # services.earlyoom.enable = true;
+
+  services.k3s.enable = false;
+  services.k3s.role = "server";
+  services.k3s.extraFlags = toString [
+    # "--kubelet-arg=v=4" # Optionally add additional args to k3s
+  ];
+
+  environment.variables = {
+    KUBECONFIG = "/home/nixos/.kube/config";
+  };
+
+  services.influxdb.enable = true;
+
+  services.telegraf.enable = true;
+  services.telegraf.extraConfig = {
+    outputs.influxdb = {
+      urls = [ "http://127.0.0.1:8086" ];
+      database = "telegraf";
+    };
+
+    inputs.net = { };
+    inputs.netstat = { };
+    inputs.file = {
+      files = [ "/sys/class/thermal/thermal_zone0/temp" ];
+      name_override = "cpu_temperature";
+      data_format = "value";
+      data_type = "integer";
+    };
+    inputs.exec = {
+      commands = [ "${pkgs.libraspberrypi}/bin/vcgencmd measure_temp" ];
+      name_override = "gpu_temperature";
+      data_format = "grok";
+      grok_patterns = [ "%{NUMBER:value:float}" ];
+    };
+    inputs.cpu = {
+      ## Whether to report per-cpu stats or not
+      percpu = true;
+      ## Whether to report total system cpu stats or not
+      totalcpu = true;
+      ## Comment this line if you want the raw CPU time metrics
+      fielddrop = [ "time_*" ];
+    };
+    inputs.disk = {
+      ## By default, telegraf gather stats for all mountpoints.
+      ## Setting mountpoints will restrict the stats to the specified mountpoints.
+      # mount_points = ["/"]
+
+      ## Ignore some mountpoints by filesystem type. For example (dev)tmpfs (usually
+      ## present on /run, /var/run, /dev/shm or /dev).
+      ignore_fs = [ "tmpfs" "devtmpfs" ];
+    };
+    inputs.diskio = {
+      ## By default, telegraf will gather stats for all devices including
+      ## disk partitions.
+      ## Setting devices will restrict the stats to the specified devices.
+      # devices = ["sda", "sdb"]
+      ## Uncomment the following line if you need disk serial numbers.
+      # skip_serial_number = false
+    };
+    inputs.kernel = { };
+    inputs.mem = { };
+    inputs.processes = { };
+    inputs.swap = { };
+    inputs.system = { };
+    inputs.interrupts = { };
+    inputs.linux_sysctl_fs = { };
+  };
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.nixos = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
+    packages = with pkgs; [ ];
+  };
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = with pkgs; [
+    git
+    htop
+    libraspberrypi
+    slirp4netns # required by k3s
+    vim
+  ];
+
+  # Some programs need SUID wrappers, can be configured further or are
+  # started in user sessions.
+  # programs.mtr.enable = true;
+  # programs.gnupg.agent = {
+  #   enable = true;
+  #   enableSSHSupport = true;
+  # };
+
+  # List services that you want to enable:
+
+  # Enable the OpenSSH daemon.
+  services.openssh.enable = true;
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  networking.firewall.enable = false;
+
+  # Copy the NixOS configuration file and link it from the resulting system
+  # (/run/current-system/configuration.nix). This is useful in case you
+  # accidentally delete configuration.nix.
+  # system.copySystemConfiguration = true;
+
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  #
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  #
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  #
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  #
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  #
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "24.05"; # Did you read the comment?
+
+}

ursa-major/hardware-configuration.nix

@@ -0,0 +1,38 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [
+      (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    {
+      device = "/dev/disk/by-uuid/44444444-4444-4444-8888-888888888888";
+      fsType = "ext4";
+    };
+
+  swapDevices = [{
+    device = "/var/lib/swapfile";
+    size = 16 * 1024;
+  }];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enu1u1.useDHCP = lib.mkDefault true;
+  # networking.interfaces.wlan0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "aarch64-linux";
+}
+