Move systems.org contents
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Systems.org
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Systems.org
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#+title: NixOS System Configurations
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#+PROPERTY: header-args :mkdirp yes
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* Systems
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I have opted to use NixOS for my systems moving forward. You can read a bit more
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about this move [[https://blog.gabrielsimmer.com/posts/from-guix-to-nixos][here]]. I haven't dabbled with custom configuration too much so
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this is pretty close to the default configuration.
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** London
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London is my primary desktop.
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Be sure to import the hardware configuration the Nix installer generates.
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#+begin_src nix :tangle nix/configuration.nix
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# Tangled in ../Systems.org
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{ config, pkgs, ... }:
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{
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imports =
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[
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./hardware-configuration.nix
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];
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#+end_src
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Bootloader is GRUB so I can dual boot Windows. =enableCryptodisk= is annoying but apparently neccesary.
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#+begin_src nix :tangle nix/configuration.nix
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boot.loader.grub = {
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enable = true;
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version = 2;
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device = "nodev";
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useOSProber = true;
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efiSupport = true;
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enableCryptodisk = true;
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canTouchEfiVariables = true;
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efiSysMountPoint = "/boot/efi";
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};
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#+end_src
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Basic system stuff that I won't really touch by hand. Importantly, enabled nix flakes.
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#+begin_src nix :tangle nix/configuration.nix
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boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
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boot.kernelPackages = pkgs.linuxPackages_6_0;
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# Setup keyfile
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boot.initrd.secrets = {
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"/crypto_keyfile.bin" = null;
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};
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# Enable swap on luks
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boot.initrd.luks.devices."luks-63100442-37df-4579-a787-cb2f2c67b3d1".device = "/dev/disk/by-uuid/63100442-37df-4579-a787-cb2f2c67b3d1";
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boot.initrd.luks.devices."luks-63100442-37df-4579-a787-cb2f2c67b3d1".keyFile = "/crypto_keyfile.bin";
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nix.settings.experimental-features = [ "nix-command" "flakes" ];
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time.timeZone = "Europe/London";
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i18n.defaultLocale = "en_GB.utf8";
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#+end_src
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Networking stuff. I use Tailscale as a mesh VPN, and Mullvad for "privacy".
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#+begin_src nix :tangle nix/configuration.nix
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networking.hostName = "LONDON"; # Define your hostname.
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# Enable networking
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networking.networkmanager.enable = true;
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systemd.services.NetworkManager-wait-online.enable = false;
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networking.firewall.checkReversePath = "loose";
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networking.firewall.allowedTCPPorts = [ 3389 ]; # for RDP
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services.mullvad-vpn.enable = true;
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services.tailscale.enable = true;
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#+end_src
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Next, X11! I haven't quite made the switch to Wayland. Theoretically Plasma supports it but it doesn't seem to want to work. Long term I want to run Sway on an ultrawide. I also enable RDP in case I need to remote back into my desktop (if I can't use SSH for whatever reason). Also enable the nvidia drivers here.
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#+begin_src nix :tangle nix/configuration.nix
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# Enable the X11 windowing system.
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services.xserver.enable = true;
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# Enable the KDE Plasma Desktop Environment.
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services.xserver.displayManager.sddm.enable = true;
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services.xserver.desktopManager.plasma5.enable = true;
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services.xrdp.enable = true;
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services.xrdp.defaultWindowManager = "startplasma-x11";
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# Configure keymap in X11
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services.xserver = {
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layout = "us";
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xkbVariant = "";
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};
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# Allow unfree packages
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nixpkgs.config.allowUnfree = true;
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services.xserver.videoDrivers = [ "nvidia" ];
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hardware.opengl.enable = true;
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#+end_src
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Basic user setup. I use home-manager for my profile applications so just give me vim and that's it (I actually use emacs, but it doesn't hurt to have a fallback).
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#+begin_src nix :tangle nix/configuration.nix
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programs.zsh.enable = true;
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environment.shells = with pkgs; [ zsh ];
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users.users.gsimmer = {
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shell = pkgs.zsh;
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isNormalUser = true;
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description = "Gabriel Simmer";
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extraGroups = [ "networkmanager" "wheel" ];
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packages = with pkgs; [ vim ];
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};
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#+end_src
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Misc. utilities. Printing, sound, Docker, Steam, fonts. Why is Steam installed at a system level? I don't know. I think I got confused. This will be move to home-manager at some point.
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#+begin_src nix :tangle nix/configuration.nix
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environment.systemPackages = with pkgs; [
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os-prober
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tailscale
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cifs-utils
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pinentry-curses
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];
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# Enable CUPS to print documents.
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services.printing.enable = true;
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# Enable sound with pipewire.
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sound.enable = true;
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hardware.pulseaudio.enable = false;
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security.rtkit.enable = true;
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services.pipewire = {
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enable = true;
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alsa.enable = true;
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alsa.support32Bit = true;
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pulse.enable = true;
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# If you want to use JACK applications, uncomment this
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#jack.enable = true;
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};
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virtualisation = {
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docker = {
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enable = true;
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rootless = {
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enable = true;
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setSocketVariable = true;
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};
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};
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};
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programs.dconf.enable = true;
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programs.steam = {
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enable = true;
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remotePlay.openFirewall = true;
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dedicatedServer.openFirewall = false;
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};
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fonts.fonts = with pkgs; [
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ibm-plex
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jetbrains-mono
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];
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services.yubikey-agent.enable = true;
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services.pcscd.enable = true;
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# Some programs need SUID wrappers, can be configured further or are
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# started in user sessions.
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# programs.mtr.enable = true;
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programs.gnupg.agent = {
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enable = true;
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pinentryFlavor = "curses";
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enableSSHSupport = true;
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};
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system.stateVersion = "22.05";
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}
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#+end_src
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Hardware configuration generated by the NixOS installer.
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#+begin_src nix :tangle nix/hardware-configuration.nix
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# Do not modify this file! It was generated by ‘nixos-generate-config’
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# and may be overwritten by future invocations. Please make changes
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# to /etc/nixos/configuration.nix instead.
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{ config, lib, pkgs, modulesPath, ... }:
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{
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imports =
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[ (modulesPath + "/installer/scan/not-detected.nix")
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];
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boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod" ];
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boot.initrd.kernelModules = [ ];
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boot.kernelModules = [ "kvm-amd" ];
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boot.extraModulePackages = [ ];
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fileSystems."/" =
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{ device = "/dev/disk/by-uuid/cd6f3e34-65ce-4be5-b4d4-6818e70dcff3";
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fsType = "ext4";
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};
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boot.initrd.luks.devices."luks-0cd5d85e-e232-4f75-a8b3-087737657fef".device = "/dev/disk/by-uuid/0cd5d85e-e232-4f75-a8b3-087737657fef";
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fileSystems."/boot/efi" =
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{ device = "/dev/disk/by-uuid/AB23-FA19";
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fsType = "vfat";
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};
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fileSystems."/home/gsimmer/FHG" = {
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device = "/dev/disk/by-label/FHG";
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fsType = "ext4";
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};
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swapDevices =
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[ { device = "/dev/disk/by-uuid/c50f2d93-2f31-4afc-ad26-4730a8f4b7f0"; }
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];
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networking.useDHCP = lib.mkDefault true;
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hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
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hardware.video.hidpi.enable = lib.mkDefault true;
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}
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#+end_src
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** Raspberry Pis
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/This section is deprecated, as my Pis now run Raspbian with k3s./
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I have two Raspberry Pis - a 3B+ ("watcher"), and a 4 ("panda"). Watcher
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serves as a watchdog for my self hosted services, usually living on Panda.
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*** The Installer Image
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Very minimal changes required here, only really need to enabled the SSH daemon and add my key so I can push the actual configuration.
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I might investigate bundling the "real" configurations into the live installer image, so I have to run fewer commands.
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[[https://nixos.wiki/wiki/NixOS_on_ARM#Getting_the_installer][More info on the NixOS Wiki]]
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#+begin_src nix :tangle nix/image-configuration.nix
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{ ... }: {
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imports = [
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<nixpkgs/nixos/modules/installer/sd-card/sd-image-aarch64.nix>
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];
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services.sshd.enable = true;
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services.ntp.enable = true;
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users.users.gsimmer = {
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isNormalUser = true;
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extraGroups = [ "wheel" ];
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password = "pass"; # This gets changed. Don't get any ideas.
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openssh.authorizedKeys.keys = ["ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILIztwQxt+jqroFONSgq+xzPMuE2I5Dq/zWPQ8RcTYJr gabriel@gitgalaxy.com"];
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};
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}
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#+end_src
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*** Watcher
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Watcher is my Raspberry Pi 3B+ responsible for monitoring various
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services and devices on my network (and generally the wider web).
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It uses [[https://github.com/gmemstr/platypus][Platypus]] (my custom monitoring platform) for this, along
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with some cron jobs to curl the services themselves.
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Actually declaractive install of Platypus is TODO, once I have the
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next release tagged.
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#+begin_src nix :tangle nix/watcher-configuration.nix
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{ config, pkgs, lib, ... }: {
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boot.loader.grub.enable = false;
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boot.loader.generic-extlinux-compatible.enable = true;
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boot.kernelPackages = pkgs.linuxPackages_latest;
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services.sshd.enable = true;
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services.ntp.enable = true;
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users.users.gsimmer = {
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isNormalUser = true;
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extraGroups = [ "wheel" ];
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password = "pass"; # This gets changed. Don't get any ideas.
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openssh.authorizedKeys.keys = ["ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILIztwQxt+jqroFONSgq+xzPMuE2I5Dq/zWPQ8RcTYJr gabriel@gitgalaxy.com"];
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};
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environment.systemPackages = [ pkgs.git pkgs.curl ];
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systemd.user.services.ensure-curlscript = {
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script = ''
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# At some point this will pull down a more complete script.
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echo "Done!"
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'';
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wantedBy = [ "multi-user.target" ];
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};
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# Enable cron services
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services.cron = {
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enable = true;
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systemCronJobs = [
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"*/5 * * * * gsimmer curl -I -o /dev/null -w \"$(date)|\\%{http_code}\" https://pw.gmem.ca > /home/gsimmer/pw-status"
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"*/5 * * * * gsimmer curl -I -o /dev/null -w \"$(date)|\\%{http_code}\" https://hue.gmem.ca > /home/gsimmer/hue-status"
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];
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};
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fileSystems = {
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"/" = {
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device = "/dev/disk/by-label/NIXOS_SD";
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fsType = "ext4";
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};
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};
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networking.firewall.enable = false;
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}
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#+end_src
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*** Panda
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Panda is a general-purpose Raspberry Pi 4, responsible for hosting
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some network shares and my password manager (using [[https://github.com/dani-garcia/vaultwarden][Vaultwarden]]).
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Largely TODO, this currently runs Raspbian until I'm happy with my
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testbed.
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#+begin_src nix :tangle nix/panda-configuration.nix
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{ ... }: {
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imports = [
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<nixpkgs/nixos/modules/installer/sd-card/sd-image-aarch64.nix>
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];
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# put your own configuration here, for example ssh keys:
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users.extraUsers.root.openssh.authorizedKeys.keys = [
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"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILIztwQxt+jqroFONSgq+xzPMuE2I5Dq/zWPQ8RcTYJr gabriel@gitgalaxy.com"
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];
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}
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#+end_src
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Moved to [[https://vancouver.scorpion-ghost.ts.net/git/arch/infra][arch/infra]].
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