339 lines
12 KiB
Nix
339 lines
12 KiB
Nix
# SPDX-FileCopyrightText: 2020 Luke Granger-Brown <depot@lukegb.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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{ pkgs, system, config, depot, lib, rebuilder, ... }@args:
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let
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inherit (depot.ops) secrets;
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switch-prebuilt = import ./switch-prebuilt.nix args;
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# Default default priority is 1000; we use 900 here so we're higher priority,
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# but lower priority than user-specified things. This is particularly
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# important for our timezone setting, which otherwise conflicts with the one
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# set by the Clickhouse module, which is used by e.g. bvm-logger.
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mkDefault = lib.mkOverride 900;
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in
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{
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imports = [
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../../../third_party/home-manager/nixos
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./vault-agent.nix
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./vault-agent-secrets.nix
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./secretsmgr.nix
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./secretsmgr-acme.nix
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./tokend.nix
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./ssh-ca-vault.nix
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];
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options.my.specialisationName = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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};
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options.my.systemType = lib.mkOption {
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type = lib.types.str;
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default = "x86_64-linux";
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};
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options.my.rundeck.hostname = lib.mkOption {
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type = lib.types.str;
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default = config.networking.fqdn;
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};
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options.my.rundeck.expectedOnline = lib.mkOption {
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type = lib.types.bool;
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default = true;
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};
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options.my.rundeck.tags = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ "nixos" ];
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};
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options.my.home-manager.imports = lib.mkOption {
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type = lib.types.listOf lib.types.path;
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default = [ ./home-manager/common.nix ];
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};
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options.my.home-manager.system = lib.mkOption {
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type = lib.types.nullOr lib.types.anything;
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default = null;
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};
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options.my.prometheus.additionalExporterPorts = lib.mkOption {
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type = lib.types.attrsOf lib.types.port;
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default = {};
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};
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options.my.ip.tailscale = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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};
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options.my.ip.tailscale6 = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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};
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options.my.deploy.enable = lib.mkOption {
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type = lib.types.bool;
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default = true;
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};
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options.my.deploy.args = lib.mkOption {
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type = lib.types.str;
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default = "";
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};
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options.my.scrapeJournal.enable = lib.mkOption {
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type = lib.types.bool;
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default = config.my.scrapeJournal.addr != null;
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};
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options.my.scrapeJournal.addr = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = if config.my.ip.tailscale6 == null then if config.my.ip.tailscale == null then null else "${config.my.ip.tailscale}:19531" else "[${config.my.ip.tailscale6}]:19531";
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};
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config = {
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hardware.enableRedistributableFirmware = true;
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networking.search = [
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"int.as205479.net"
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"as205479.net"
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];
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services.resolved = {
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enable = true;
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llmnr = "false"; # LLMNR breaks search domains.
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dnssec = "false"; # DNSSEC support in systemd-resolved is just broken.
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domains = config.networking.search;
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extraConfig = ''
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# For global search domains to work, we also need global DNS servers.
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DNS=8.8.8.8#dns.google [2001:4860:4860::8888]#dns.google 1.1.1.1#cloudflare-dns.com [2606:4700:4700::1111]#cloudflare-dns.com
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'';
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fallbackDns = [
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"8.8.8.8"
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"2001:4860:4860::8888"
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"1.1.1.1"
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"2606:4700:4700::1111"
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];
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};
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my.rundeck.tags = [ "nixos" ];
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nix = {
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package = pkgs.nix_2_3; # Use a working nix.
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nixPath = [ "depot=/home/lukegb/depot/" "nixpkgs=/home/lukegb/depot/hack/nixpkgs/" ];
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settings = {
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trusted-users = [ "root" "@wheel" "deployer" ];
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substituters = lib.mkForce [ "https://cache.nixos.org/" "s3://lukegb-nix-cache?endpoint=storage.googleapis.com&trusted=1" ];
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trusted-substituters = lib.mkForce [ "https://cache.nixos.org/" "s3://lukegb-nix-cache?endpoint=storage.googleapis.com&trusted=1" ];
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};
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};
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nixpkgs.config = depot.third_party.nixpkgsConfig;
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documentation.nixos.enable = false; # I just use the website.
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i18n.defaultLocale = "en_GB.UTF-8";
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console.keyMap = "us";
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time.timeZone = mkDefault "Etc/UTC";
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zramSwap = {
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enable = true;
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memoryMax = 4 * 1024 * 1024 * 1024;
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};
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environment.systemPackages = with pkgs; [
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vim rxvt-unicode-unwrapped.terminfo tmux rebuilder tailscale rsync libarchive tcpdump restic
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alacritty.terminfo kitty.terminfo
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iftop htop jq
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depot.nix.pkgs.mercurial
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switch-prebuilt
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depot.ops.vault.provision-secret-id
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wireguard-tools
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];
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networking.useDHCP = false;
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networking.firewall = {
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allowPing = true;
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logRefusedConnections = false;
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checkReversePath = lib.mkDefault "loose";
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};
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environment.homeBinInPath = true;
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security.pam.enableSSHAgentAuth = true;
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security.pam.ussh = {
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enable = true;
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control = "sufficient";
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caFile = ../../secrets/client-ca.pub;
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};
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users.mutableUsers = false;
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users.users = let secrets = depot.ops.secrets; in {
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root.hashedPassword = secrets.passwordHashes.root;
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lukegb = {
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isNormalUser = true;
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uid = 1000;
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extraGroups = [ "wheel" "audio" ];
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hashedPassword = secrets.passwordHashes.lukegb;
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openssh.authorizedKeys.keyFiles = [
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../../secrets/lukegb_totoro.pub
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../../secrets/lukegb_termius.pub
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../../secrets/lukegb_porcorosso_win.pub
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../../secrets/lukegb_porcorosso_wsl.pub
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../../secrets/lukegb_porcorosso_linux.pub
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../../secrets/lukegb_red_solo.pub
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];
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};
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deployer = {
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isSystemUser = true;
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uid = 1001;
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group = "deployer";
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hashedPassword = "!";
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useDefaultShell = true;
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home = "/var/lib/deployer";
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createHome = true;
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openssh.authorizedKeys.keyFiles = [
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../../secrets/deployer_ed25519.pub
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../../secrets/rundeck_deployer_rsa.pub
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];
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};
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};
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users.groups.deployer = {};
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security.sudo.extraRules = [{
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users = [ "deployer" ];
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commands = [{
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command = "${rebuilder}/bin/rebuilder";
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options = [ "NOPASSWD" ];
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} {
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command = "${switch-prebuilt}/bin/switch-prebuilt";
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options = [ "NOPASSWD" ];
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}];
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}];
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security.sudo.extraConfig = ''
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Defaults:deployer !requiretty
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'';
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programs.mtr.enable = true;
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services.openssh.enable = true;
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programs.ssh = {
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extraConfig = ''
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CanonicalizeHostname yes
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CanonicalDomains int.as205479.net as205479.net otter-acoustic.ts.net
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CanonicalizeMaxDots 0
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CanonicalizePermittedCNAMEs *.lukegb.com:*.as205479.net,*.int.as205479.net,*.otter-acoustic.ts.net *.lukegb.dev:*.as205479.net,*.int.as205479.net,*.otter-acoustic.ts.net *.zxcvbnm.ninja:*.as205479.net,*.int.as205479.net,*.otter-acoustic.ts.net
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'';
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knownHosts."*" = {
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certAuthority = true;
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publicKey = builtins.readFile ../../secrets/server-ca.pub;
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};
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};
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services.tailscale.enable = true;
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networking.firewall.interfaces.tailscale0 = {
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# Just allow anything in on tailscale0.
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allowedTCPPortRanges = [{ from = 0; to = 65535; }];
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allowedUDPPortRanges = [{ from = 0; to = 65535; }];
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};
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boot = {
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kernelModules = [ "tcp_bbr" ];
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kernel.sysctl."net.ipv4.tcp_congestion_control" = "bbr";
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kernel.sysctl."net.core.default_qdisc" = "fq_codel";
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};
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# Clean up daily.
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nix.gc = {
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automatic = mkDefault true;
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dates = "*-*-* 05:00:00";
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options = "--delete-older-than 7d";
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};
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home-manager.useUserPackages = true;
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home-manager.useGlobalPkgs = true;
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systemd.services."home-manager-lukegb" = {
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before = [ "display-manager.service" ];
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wantedBy = [ "multi-user.target" ];
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};
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home-manager.users.lukegb = { pkgs, ... }: ({
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imports = [ ({
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_module.args = args // {
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configName = null;
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};
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})] ++ config.my.home-manager.imports ++ (
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lib.optional (config.my.home-manager.system != null) config.my.home-manager.system
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);
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});
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services.prometheus.exporters.node = {
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enable = true;
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enabledCollectors = [ "systemd" "textfile" ];
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extraFlags = [
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"--collector.textfile.directory=/run/prometheus-textfile-exports"
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];
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};
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system.activationScripts.node-exporter = {
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text = ''
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test -d /run/prometheus-textfile-exports || mkdir /run/prometheus-textfile-exports
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my_version_string="$(cat "$systemConfig/nixos-version")"
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my_hash_string="$(readlink -f "$systemConfig" | ${pkgs.gnugrep}/bin/grep -Eo '\b[0-9a-df-np-sv-z]{32}\b')"
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my_specialisation="$(cat "$systemConfig/specialisation-name" 2>/dev/null || true)"
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echo "nixos_running_system{version=\"$my_version_string\", hash=\"$my_hash_string\", specialisation=\"$my_specialisation\"} 1" > /run/prometheus-textfile-exports/running_system.prom
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if test -e /run/booted-system; then
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my_version_string="$(cat "/run/booted-system/nixos-version")"
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my_hash_string="$(readlink -f "/run/booted-system" | ${pkgs.gnugrep}/bin/grep -Eo '\b[0-9a-df-np-sv-z]{32}\b')"
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my_specialisation="$(cat "/run/booted-system/specialisation-name" 2>/dev/null || true)"
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echo "nixos_booted_system{version=\"$my_version_string\", hash=\"$my_hash_string\", specialisation=\"$my_specialisation\"} 1" > /run/prometheus-textfile-exports/booted_system.prom
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fi
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${depot.nix.pkgs.nixos-size}/bin/nixos-size > /run/prometheus-textfile-exports/nixos_size.prom
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'';
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};
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boot.postBootCommands = lib.mkAfter ''
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test -d /run/prometheus-textfile-exports || mkdir /run/prometheus-textfile-exports
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if test -e /run/booted-system; then
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my_version_string="$(cat "/run/booted-system/nixos-version")"
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my_hash_string="$(readlink -f "/run/booted-system" | ${pkgs.gnugrep}/bin/grep -Eo '\b[0-9a-df-np-sv-z]{32}\b')"
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my_specialisation="$(cat "/run/booted-system/specialisation-name" 2>/dev/null || true)"
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echo "nixos_booted_system{version=\"$my_version_string\", hash=\"$my_hash_string\", specialisation=\"$my_specialisation\"} 1" > /run/prometheus-textfile-exports/booted_system.prom
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fi
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${depot.nix.pkgs.nixos-size}/bin/nixos-size > /run/prometheus-textfile-exports/nixos_size.prom
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'';
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system.extraSystemBuilderCmds = lib.mkAfter ''
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echo "${if config.my.specialisationName == null then "" else config.my.specialisationName}" > $out/specialisation-name
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'';
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system.nixos.tags = lib.mkBefore ([
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depot.version
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] ++ lib.optional (config.my.specialisationName != null) "specialisation-${config.my.specialisationName}");
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services.nginx = {
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recommendedTlsSettings = true;
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recommendedOptimisation = true;
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recommendedGzipSettings = true;
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recommendedProxySettings = true;
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};
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my.vault.secrets.nix-daemon = {
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template = ''
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{{ with secret "kv/apps/nix-daemon" }}
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AWS_ACCESS_KEY_ID={{ .Data.data.cacheAccessKeyID }}
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AWS_SECRET_ACCESS_KEY={{ .Data.data.cacheSecretAccessKey }}
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{{ end }}
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'';
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group = "root";
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reloadOrRestartUnits = [ "nix-daemon.service" ];
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};
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# - prefix to make the file existing optional.
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systemd.services.nix-daemon.serviceConfig.EnvironmentFile = "-${config.my.vault.secrets.nix-daemon.path}";
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services.fwupd.enable = true;
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# This is enabled independently of my.scrapeJournal.enable.
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services.journald.enableHttpGateway = config.my.ip.tailscale != null || config.my.ip.tailscale6 != null;
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systemd.sockets.systemd-journal-gatewayd.socketConfig = lib.optionalAttrs (config.my.ip.tailscale != null) {
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ListenStream = [ "" ] ++ (lib.optional (config.my.ip.tailscale != null) "${config.my.ip.tailscale}:19531") ++ (lib.optional (config.my.ip.tailscale6 != null) "[${config.my.ip.tailscale6}:19531");
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FreeBind = true;
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};
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system.disableInstallerTools = lib.mkDefault true;
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};
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}
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