nixos/defaults.nix

   1 { inputs, pkgs, lib, config, ... }:
   2 let inherit (lib) types;
   3     inherit (config.networking) hostName domain;
   4 in
   5 {
   6 imports = [
   7   ./modules.nix
   8   defaults/predictable-interface-names.nix
   9 ];
  10 nix = {
  11   #binaryCaches = lib.mkForce [];
  12   extraOptions = ''
  13   '';
  14   # Use gc.automatic to keep disk space under control.
  15   gc = {
  16     automatic = lib.mkDefault true;
  17     dates = lib.mkDefault "weekly";
  18     options = lib.mkDefault "--delete-older-than 30d";
  19   };
  20   nixPath = [
  21     # WARNING: this is a hack to avoid copying Nixpkgs
  22     # a second time into the Nix store.
  23     # It makes only sense when Nixpkgs is already in the Nix store,
  24     # and is registered.
  25     "nixpkgs=/etc/nixpkgs:nixpkgs-overlays=/etc/nixpkgs-overlays/overlays.nix"
  26   ];
  27 };
  28 environment.etc."nixpkgs".source = pkgs.path;
  29 environment.etc."nixpkgs-overlays".source = inputs.self + "/nixpkgs";
  30
  31 nixpkgs = {
  32   config = {
  33     allowUnfree = false;
  34     /*
  35     packageOverrides = pkgs: {
  36       postfix = pkgs.postfix.override {
  37         withLDAP = true;
  38       };
  39     };
  40     */
  41   };
  42 };
  43
  44 documentation.nixos = {
  45   enable = false; # NOTE: useless on a server, and CPU intensive.
  46 };
  47
  48 time = {
  49   timeZone = "Europe/Paris";
  50 };
  51
  52 i18n = {
  53   defaultLocale = "fr_FR.UTF-8";
  54 };
  55
  56 console = {
  57   font   = "Lat2-Terminus16";
  58   keyMap = "fr";
  59 };
  60
  61 # Always try to start all the units (default.target)
  62 # because systemd's emergency shell does not try to start sshd.
  63 # https://wiki.archlinux.org/index.php/systemd#Disable_emergency_mode_on_remote_machine
  64 systemd.enableEmergencyMode = false;
  65
  66 # This is a remote headless server: always reboot on a kernel panic,
  67 # to not have to physically go power cycle the apu2e4.
  68 # Which happens if the wrong ZFS password is used
  69 # but the boot is manually forced to continue.
  70 # Using kernelParams instead of kernel.sysctl
  71 # sets this up as soon as the initrd.
  72 boot.kernelParams = [ "panic=10" ];
  73
  74 boot.cleanTmpDir = true;
  75 boot.tmpOnTmpfs = true;
  76
  77 networking = {
  78   # Fix hostname --fqdn
  79   # See: https://github.com/NixOS/nixpkgs/issues/10183#issuecomment-537629621
  80   hosts = {
  81     "127.0.1.1" = lib.mkForce [ "${hostName}.${domain}" hostName ];
  82     "::1"       = lib.mkForce [ "${hostName}.${domain}" hostName "localhost" ];
  83   };
  84   search = [ domain ];
  85 };
  86
  87 services = {
  88   openssh = {
  89     enable = true;
  90     passwordAuthentication = false;
  91     extraConfig = ''
  92     '';
  93   };
  94   journald = {
  95     extraConfig = ''
  96       Compress=true
  97       MaxRetentionSec=1month
  98       Storage=persistent
  99       SystemMaxUse=128M
 100     '';
 101   };
 102 };
 103
 104 environment.systemPackages = with pkgs; [
 105   binutils
 106   bmon
 107   conntrack-tools
 108   #dnsutils
 109   dstat
 110   gnupg
 111   htop
 112   inetutils
 113   iftop
 114   iotop
 115   ldns
 116   linuxPackages.cpupower
 117   lsof
 118   mailutils
 119   multitail
 120   ncdu
 121   nethogs
 122   nload
 123   nmon
 124   pv
 125   smem
 126   swaplist
 127   stress
 128   tcpdump
 129   tmux
 130   tree
 131   vim
 132   which
 133 ];
 134 environment.variables.SYSTEMD_LESS = "FKMRX";
 135 environment.etc."inputrc".text = lib.readFile defaults/readline/inputrc;
 136
 137 programs = {
 138   bash = {
 139     interactiveShellInit = ''
 140       bind '"\e[A":history-search-backward'
 141       bind '"\e[B":history-search-forward'
 142
 143       # Ignore duplicate commands, ignore commands starting with a space
 144       export HISTCONTROL=erasedups:ignorespace
 145       export HISTSIZE=42000
 146
 147       # Append to the history instead of overwriting (good for multiple connections)
 148       shopt -s histappend
 149
 150       # Enable ** file pattern
 151       shopt -s globstar
 152
 153       # Convenient mkdir wrapper
 154       mkcd() { mkdir -p "$1" && cd "$1"; }
 155     '';
 156     shellAliases = {
 157       cl = "clear";
 158       l  = "ls -alh";
 159       ll = "ls -al";
 160       ls = "ls --color=tty";
 161       mem = "ps -e -orss=,user=,args= | sort -b -k1,1n";
 162
 163       s="sudo systemctl";
 164       st="sudo systemctl status";
 165       s-u="systemctl --user";
 166       j="sudo journalctl -u";
 167
 168       nixos-clean="sudo nix-collect-garbage -d";
 169       nixos-history="sudo nix-env --list-generations --profile /nix/var/nix/profiles/system";
 170       nixos-rollback="sudo nixos-rebuild switch --rollback";
 171       nixos-update="sudo nix-channel --update";
 172       nixos-upgrade="sudo nixos-rebuild switch";
 173       nixos-upstream="sudo nix-channel --list";
 174     };
 175   };
 176   gnupg = {
 177     agent = {
 178       pinentryFlavor = "curses";
 179     };
 180   };
 181   mosh.enable = true;
 182   mtr.enable = true;
 183   traceroute.enable = true;
 184 };
 185 }