darman
2fd5752d87
The old key was a leftover from a previous laptop. Also cap every host at 5 boot generations and journald at 200M so none of them can quietly repeat jupiter's 34-generations-on-a-29G-eMMC incident.
99 lines
3.3 KiB
Nix
99 lines
3.3 KiB
Nix
{ pkgs, ... }:
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# Shared base for all hosts: user, SSH hardening, nix settings, packages.
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{
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# ---- User ----
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users.users.darman = {
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isNormalUser = true;
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description = "darman";
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extraGroups = [ "wheel" "networkmanager" ];
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shell = pkgs.zsh;
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openssh.authorizedKeys.keys = [
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"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILD5K6AQ0wYYHbNGzC4PyunUQsXbaD0iu1eaadLtv+Xp darman@terra"
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];
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};
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security.sudo = {
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enable = true;
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wheelNeedsPassword = true;
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extraConfig = ''
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Defaults timestamp_timeout=20
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'';
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};
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# ---- SSH (key-only) ----
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services.openssh = {
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enable = true;
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settings = {
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PasswordAuthentication = false;
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PermitRootLogin = "no";
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};
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};
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# ---- Nix ----
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nix.settings = {
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experimental-features = [ "nix-command" "flakes" ];
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# trust wheel so `nixos-rebuild --target-host darman@…` can push closures.
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trusted-users = [ "root" "@wheel" ];
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# authentik (services/identity/authentik.nix) comes from authentik-nix,
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# which cache.nixos.org doesn't carry — without this it's ~400 local
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# derivations (npm, rust, python). NOTE: the closure is built on whatever
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# machine runs ./scripts/deploy, so the LAPTOP needs these two lines too,
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# in /etc/nix/nix.custom.conf (Determinate Nix rewrites nix.conf).
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extra-substituters = [ "https://nix-community.cachix.org" ];
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extra-trusted-public-keys = [
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"nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
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];
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};
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nix.gc = {
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automatic = true;
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dates = "weekly";
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options = "--delete-older-than 30d";
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};
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environment.systemPackages = with pkgs; [ git btop tmux curl wget zsh-powerlevel10k lsd ];
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# ---- zsh / oh-my-zsh / powerlevel10k ----
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programs.zsh = {
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enable = true;
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ohMyZsh = {
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enable = true;
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theme = "robbyrussell"; # prompt itself replaced by p10k below
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};
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shellAliases = {
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ls = "lsd";
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};
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interactiveShellInit = ''
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source ${pkgs.zsh-powerlevel10k}/share/zsh-powerlevel10k/powerlevel10k.zsh-theme
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source ${./dotfiles/p10k.zsh}
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'';
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};
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# ---- Boot generations ----
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# Cap every host at 5 generations so none of them can quietly repeat
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# jupiter's 34-generations-on-a-29G-eMMC incident. Both loader options are
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# set unconditionally since only one is ever enabled per host (systemd-boot
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# everywhere except mercury's generic-extlinux-compatible RPi image) — the
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# other one is simply inert.
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boot.loader.systemd-boot.configurationLimit = 5;
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boot.loader.generic-extlinux-compatible.configurationLimit = 5;
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# Stock journald defaults to ~10% of the filesystem (up to 4G) before it
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# rotates — no scheduled vacuum, just a ceiling it grows into. On jupiter's
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# 29G eMMC that's ~2.9G it could silently accumulate. Cap it well below that
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# everywhere instead of only noticing when a disk fills up again.
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services.journald.extraConfig = ''
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SystemMaxUse=200M
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'';
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# ---- Locale / firewall base ----
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time.timeZone = "Europe/Berlin";
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i18n.defaultLocale = "en_US.UTF-8";
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console.keyMap = "de";
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# Firewall on, ssh always allowed. Service modules add their own ports
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# (samba via openFirewall, caddy 80/443, tailscale trusts tailscale0).
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networking.firewall.enable = true;
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networking.firewall.allowedTCPPorts = [ 22 ];
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}
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