Merge pull request 'Add ipv6 gateway' (!82) from ipv6-fix into main

Reviewed-on: Drift/pvv-nixos-config#82
Reviewed-by: Daniel Lovbrotte Olsen <danio@pvv.ntnu.no>

.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.nix]
+indent_style = space
+indent_size = 2

.envrc

@@ -0,0 +1 @@
+use flake

.git-blame-ignore-revs

@@ -0,0 +1 @@
+e00008da1afe0d760badd34bbeddff36bb08c475

.gitignore

@@ -1,2 +1,4 @@
 result*
 /configuration.nix
+/.direnv/
+*.qcow2

.sops.yaml

@@ -3,10 +3,14 @@ keys:
   - &user_danio age17tagmpwqjk3mdy45rfesrfey6h863x8wfq38wh33tkrlrywxducs0k6tpq
   - &user_felixalb age1mrnldl334l2nszuta6ywvewng0fswv2dz9l5g4qcwe3nj4yxf92qjskdx6
   - &user_oysteikt F7D37890228A907440E1FD4846B9228E814A2AAC
+  - &user_eirikwit age1ju7rd26llahz3g8tz7cy5ld52swj8gsmg0flrmrxngc0nj0avq3ssh0sn5
+  - &user_pederbs_sopp age1hmpdk4h69wxpwqk9tkud39f66hprhehxtzhgw97r6dvr7v0mx5jscsuhkn
+  - &user_pederbs_nord age1wrssr4z4g6vl3fd3qme5cewchmmhm0j2xe6wf2meu4r6ycn37anse98mfs
+  - &user_pederbs_bjarte age1zhxul786an743u0fascv4wtc5xduu7qfy803lfs539yzhgmlq5ds2lznt5
 
   # Hosts
   - &host_jokum age1gp8ye4g2mmw3may5xg0zsy7mm04glfz3788mmdx9cvcsdxs9hg0s0cc9kt
-  - &host_ildkule age1hn45n46ypyrvypv0mwfnpt9ddrlmw34dwlpf33n8v67jexr3lucq6ahc9x
+  - &host_ildkule age1x28hmzvuv6f2n66c0jtqcca3h9rput8d7j5uek6jcpx8n9egd52sqpejq0
   - &host_bekkalokk age12nj59tguy9wg882updc2vjdusx5srnxmjyfaqve4zx6jnnsaw3qsyjq6zd
   - &host_bicep age1sl43gc9cw939z5tgha2lpwf0xxxgcnlw7w4xem4sqgmt2pt264vq0dmwx2
 
@@ -18,17 +22,24 @@ creation_rules:
       - *host_jokum
       - *user_danio
       - *user_felixalb
+      - *user_eirikwit
+      - *user_pederbs_sopp
+      - *user_pederbs_nord
+      - *user_pederbs_bjarte
       pgp:
       - *user_oysteikt
 
   # Host specific secrets
-  
+
   - path_regex: secrets/bekkalokk/[^/]+\.yaml$
     key_groups:
     - age:
       - *host_bekkalokk
       - *user_danio
       - *user_felixalb
+      - *user_pederbs_sopp
+      - *user_pederbs_nord
+      - *user_pederbs_bjarte
       pgp:
       - *user_oysteikt
 
@@ -38,6 +49,9 @@ creation_rules:
       - *host_jokum
       - *user_danio
       - *user_felixalb
+      - *user_pederbs_sopp
+      - *user_pederbs_nord
+      - *user_pederbs_bjarte
       pgp:
       - *user_oysteikt
 
@@ -47,14 +61,20 @@ creation_rules:
       - *host_ildkule
       - *user_danio
       - *user_felixalb
+      - *user_pederbs_sopp
+      - *user_pederbs_nord
+      - *user_pederbs_bjarte
       pgp:
       - *user_oysteikt
-  
+
   - path_regex: secrets/bicep/[^/]+\.yaml$
     key_groups:
     - age:
       - *host_bicep
       - *user_danio
       - *user_felixalb
+      - *user_pederbs_sopp
+      - *user_pederbs_nord
+      - *user_pederbs_bjarte
       pgp:
       - *user_oysteikt

README.MD

@@ -26,10 +26,14 @@ Det er sikkert lurt å lage en PR først om du ikke er vandt til nix enda.
 Innen 24h skal alle systemene hente ned den nye konfigurasjonen og deploye den.
 
 Du kan tvinge en maskin til å oppdatere seg før dette ved å kjøre:
-`nixos-rebuild switch --update-input nixpkgs --update-input nixpkgs-unstable --no-write-lock-file --refresh --flake git+https://git.pvv.ntnu.no/Drift/pvv-nixos-config.git --upgrade`
+`nixos-rebuild switch --update-input nixpkgs --update-input nixpkgs-unstable --no-write-lock-file --refresh --upgrade --flake git+https://git.pvv.ntnu.no/Drift/pvv-nixos-config.git`
 
 som root på maskinen.
 
+Hvis du ikke har lyst til å oppdatere alle pakkene (og kanskje måtte vente en stund!) kan du kjøre
+
+`nixos-rebuild switch --override-input nixpkgs nixpkgs --override-input nixpkgs-unstable nixpkgs-unstable --flake git+https://git.pvv.ntnu.no/Drift/pvv-nixos-config.git`
+
 ## Seksjonen for hemmeligheter
 
 For at hemmeligheter ikke skal deles med hele verden i git - eller å være world

base.nix

@@ -1,86 +0,0 @@
-{ config, lib, pkgs, inputs, values, ... }:
-
-{
-  imports = [
-    ./users
-  ];
-
-  networking.domain = "pvv.ntnu.no";
-  networking.useDHCP = false;
-  # networking.search = [ "pvv.ntnu.no" "pvv.org" ];
-  # networking.nameservers = lib.mkDefault [ "129.241.0.200" "129.241.0.201" ];
-  # networking.tempAddresses = lib.mkDefault "disabled";
-  # networking.defaultGateway = values.hosts.gateway;
-
-  systemd.network.enable = true;
-
-  services.resolved = {
-    enable = lib.mkDefault true;
-    dnssec = "false"; # Supposdly this keeps breaking and the default is to allow downgrades anyways...
-  };
-
-  time.timeZone = "Europe/Oslo";
-
-  i18n.defaultLocale = "en_US.UTF-8";
-  console = {
-    font = "Lat2-Terminus16";
-    keyMap = "no";
-  };
-
-  system.autoUpgrade = {
-    enable = true;
-    flake = "git+https://git.pvv.ntnu.no/Drift/pvv-nixos-config.git";
-    flags = [
-      "--update-input" "nixpkgs"
-      "--update-input" "nixpkgs-unstable"
-      "--no-write-lock-file"
-    ];
-  };
-  nix.gc.automatic = true;
-  nix.gc.options = "--delete-older-than 2d";
-
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
-
-  /* This makes commandline tools like
-  ** nix run nixpkgs#hello
-  ** and nix-shell -p hello
-  ** use the same channel the system
-  ** was built with
-  */
-  nix.registry = {
-    nixpkgs.flake = inputs.nixpkgs;
-  };
-  nix.nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
-
-  environment.systemPackages = with pkgs; [
-    file
-    git
-    gnupg
-    htop
-    nano
-    rsync
-    screen
-    tmux
-    vim
-    wget
-
-    kitty.terminfo
-  ];
-
-  programs.zsh.enable = true;
-
-  users.groups."drift".name = "drift";
-
-  # Trusted users on the nix builder machines
-  users.groups."nix-builder-users".name = "nix-builder-users";
-
-  services.openssh = {
-    enable = true;
-    extraConfig = ''
-      PubkeyAcceptedAlgorithms=+ssh-rsa
-    '';
-    settings.PermitRootLogin = "yes";
-  };
-
-
-}

base/default.nix

@@ -0,0 +1,60 @@
+{ pkgs, lib, ... }:
+
+{
+  imports = [
+    ../users
+    ../modules/snakeoil-certs.nix
+
+    ./networking.nix
+    ./nix.nix
+
+    ./services/acme.nix
+    ./services/auto-upgrade.nix
+    ./services/irqbalance.nix
+    ./services/logrotate.nix
+    ./services/nginx.nix
+    ./services/openssh.nix
+    ./services/postfix.nix
+    ./services/smartd.nix
+    ./services/thermald.nix
+  ];
+
+  boot.tmp.cleanOnBoot = lib.mkDefault true;
+
+  time.timeZone = "Europe/Oslo";
+
+  i18n.defaultLocale = "en_US.UTF-8";
+  console = {
+    font = "Lat2-Terminus16";
+    keyMap = "no";
+  };
+
+  environment.systemPackages = with pkgs; [
+    file
+    git
+    gnupg
+    htop
+    nano
+    ripgrep
+    rsync
+    screen
+    tmux
+    vim
+    wget
+
+    kitty.terminfo
+  ];
+
+  programs.zsh.enable = true;
+
+  security.sudo.execWheelOnly = true;
+  security.sudo.extraConfig = ''
+    Defaults lecture = never
+  '';
+
+  users.groups."drift".name = "drift";
+
+  # Trusted users on the nix builder machines
+  users.groups."nix-builder-users".name = "nix-builder-users";
+}
+

base/networking.nix

@@ -0,0 +1,13 @@
+{ lib, values, ... }:
+{
+  systemd.network.enable = true;
+  networking.domain = "pvv.ntnu.no";
+  networking.useDHCP = false;
+
+  # The rest of the networking configuration is usually sourced from /values.nix
+
+  services.resolved = {
+    enable = lib.mkDefault true;
+    dnssec = "false"; # Supposdly this keeps breaking and the default is to allow downgrades anyways...
+  };
+}

base/nix.nix

@@ -0,0 +1,34 @@
+{ inputs, ... }:
+{
+  nix = {
+    gc = {
+      automatic = true;
+      options = "--delete-older-than 2d";
+    };
+
+    settings = {
+      allow-dirty = true;
+      auto-optimise-store = true;
+      builders-use-substitutes = true;
+      experimental-features = [ "nix-command" "flakes" ];
+      log-lines = 50;
+      use-xdg-base-directories = true;
+    };
+
+    /* This makes commandline tools like
+    ** nix run nixpkgs#hello
+    ** and nix-shell -p hello
+    ** use the same channel the system
+    ** was built with
+    */
+    registry = {
+      "nixpkgs".flake = inputs.nixpkgs;
+      "nixpkgs-unstable".flake = inputs.nixpkgs-unstable;
+      "pvv-nix".flake = inputs.self;
+    };
+    nixPath = [
+      "nixpkgs=${inputs.nixpkgs}"
+      "unstable=${inputs.nixpkgs-unstable}"
+    ];
+  };
+}

base/services/acme.nix

@@ -0,0 +1,15 @@
+{ ... }:
+{
+  security.acme = {
+    acceptTerms = true;
+    defaults.email = "drift@pvv.ntnu.no";
+  };
+
+  # Let's not spam LetsEncrypt in `nixos-rebuild build-vm` mode:
+  virtualisation.vmVariant = {
+    security.acme.defaults.server = "https://127.0.0.1";
+    security.acme.preliminarySelfsigned = true;
+
+    users.users.root.initialPassword = "root";
+  };
+}

base/services/auto-upgrade.nix

@@ -0,0 +1,26 @@
+{ inputs, pkgs, lib, ... }:
+{
+  system.autoUpgrade = {
+    enable = true;
+    flake = "git+https://git.pvv.ntnu.no/Drift/pvv-nixos-config.git";
+    flags = [
+      # --update-input is deprecated since nix 2.22, and removed in lix 2.90
+      # https://git.lix.systems/lix-project/lix/issues/400
+      "--refresh"
+      "--override-input" "nixpkgs" "github:nixos/nixpkgs/nixos-24.05-small"
+      "--override-input" "nixpkgs-unstable" "github:nixos/nixpkgs/nixos-unstable-small"
+      "--no-write-lock-file"
+    ];
+  };
+
+  # workaround for https://github.com/NixOS/nix/issues/6895
+  # via https://git.lix.systems/lix-project/lix/issues/400
+  environment.etc."current-system-flake-inputs.json".source
+    = pkgs.writers.writeJSON "flake-inputs.json" (
+      lib.flip lib.mapAttrs inputs (name: input:
+        # inputs.*.sourceInfo sans outPath, since writeJSON will otherwise serialize sourceInfo like a derivation
+        lib.removeAttrs (input.sourceInfo or {}) [ "outPath" ]
+          // { store-path = input.outPath; } # comment this line if you don't want to retain a store reference to the flake inputs
+      )
+    );
+}

base/services/irqbalance.nix

@@ -0,0 +1,4 @@
+{ ... }:
+{
+  services.irqbalance.enable = true;
+}

base/services/logrotate.nix

@@ -0,0 +1,42 @@
+{ ... }:
+{
+  # source: https://github.com/logrotate/logrotate/blob/main/examples/logrotate.service
+  systemd.services.logrotate = {
+    documentation = [ "man:logrotate(8)" "man:logrotate.conf(5)" ];
+    unitConfig.RequiresMountsFor = "/var/log";
+    serviceConfig = {
+      Nice = 19;
+      IOSchedulingClass = "best-effort";
+      IOSchedulingPriority = 7;
+
+      ReadWritePaths = [ "/var/log" ];
+
+      AmbientCapabilities = [ "" ];
+      CapabilityBoundingSet = [ "" ];
+      DeviceAllow = [ "" ];
+      LockPersonality = true;
+      MemoryDenyWriteExecute = true;
+      NoNewPrivileges = true; # disable for third party rotate scripts
+      PrivateDevices = true;
+      PrivateNetwork = true; # disable for mail delivery
+      PrivateTmp = true;
+      ProtectClock = true;
+      ProtectControlGroups = true;
+      ProtectHome = true; # disable for userdir logs
+      ProtectHostname = true;
+      ProtectKernelLogs = true;
+      ProtectKernelModules = true;
+      ProtectKernelTunables = true;
+      ProtectProc = "invisible";
+      ProtectSystem = "full";
+      RestrictNamespaces = true;
+      RestrictRealtime = true;
+      RestrictSUIDSGID = true; # disable for creating setgid directories
+      SocketBindDeny = [ "any" ];
+      SystemCallArchitectures = "native";
+      SystemCallFilter = [
+        "@system-service"
+      ];
+    };
+  };
+}

base/services/nginx.nix

@@ -0,0 +1,44 @@
+{ config, lib, ... }:
+{
+  # nginx return 444 for all nonexistent virtualhosts
+
+  systemd.services.nginx.after = [ "generate-snakeoil-certs.service" ];
+
+  environment.snakeoil-certs = lib.mkIf config.services.nginx.enable {
+    "/etc/certs/nginx" = {
+      owner = "nginx";
+      group = "nginx";
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = lib.mkIf config.services.nginx.enable [ 80 443 ];
+
+  services.nginx = {
+    recommendedTlsSettings = true;
+    recommendedProxySettings = true;
+    recommendedOptimisation = true;
+    recommendedGzipSettings = true;
+
+    appendConfig = ''
+      pcre_jit on;
+      worker_processes auto;
+      worker_rlimit_nofile 100000;
+    '';
+    eventsConfig = ''
+      worker_connections 2048;
+      use epoll;
+      multi_accept on;
+    '';
+  };
+
+  systemd.services.nginx.serviceConfig = lib.mkIf config.services.nginx.enable {
+    LimitNOFILE = 65536;
+  };
+
+  services.nginx.virtualHosts."_" = lib.mkIf config.services.nginx.enable {
+    sslCertificate = "/etc/certs/nginx.crt";
+    sslCertificateKey = "/etc/certs/nginx.key";
+    addSSL = true;
+    extraConfig = "return 444;";
+  };
+}

base/services/openssh.nix

@@ -0,0 +1,14 @@
+{ ... }:
+{
+  services.openssh = {
+    enable = true;
+    startWhenNeeded = true;
+    extraConfig = ''
+      PubkeyAcceptedAlgorithms=+ssh-rsa
+      Match Group wheel
+        PasswordAuthentication no
+      Match All
+    '';
+    settings.PermitRootLogin = "yes";
+  };
+}

base/services/postfix.nix

@@ -0,0 +1,23 @@
+{ config, pkgs, lib, ... }:
+let
+  cfg = config.services.postfix;
+in
+{
+  services.postfix = {
+    enable = true;
+
+    hostname = "${config.networking.hostName}.pvv.ntnu.no";
+    domain = "pvv.ntnu.no";
+
+    relayHost = "smtp.pvv.ntnu.no";
+    relayPort = 465;
+
+    config = {
+      smtp_tls_wrappermode = "yes";
+      smtp_tls_security_level = "encrypt";
+    };
+
+    # Nothing should be delivered to this machine
+    destination = [ ];
+  };
+}

base/services/smartd.nix

@@ -0,0 +1,8 @@
+{ config, pkgs, lib, ... }:
+{
+  services.smartd.enable = lib.mkDefault true;
+
+  environment.systemPackages = lib.optionals config.services.smartd.enable (with pkgs; [
+    smartmontools
+  ]);
+}

base/services/thermald.nix

@@ -0,0 +1,8 @@
+{ config, lib, ... }:
+{
+  # Let's not thermal throttle
+  services.thermald.enable = lib.mkIf (lib.all (x: x) [
+      (config.nixpkgs.system == "x86_64-linux")
+      (!config.boot.isContainer or false)
+    ]) true;
+}

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1700927249,
-        "narHash": "sha256-iqmIWiEng890/ru7ZBf4nUezFPyRm2fjRTvuwwxqk2o=",
+        "lastModified": 1725242307,
+        "narHash": "sha256-a2iTMBngegEZvaNAzzxq5Gc5Vp3UWoGUqWtK11Txbic=",
         "owner": "nix-community",
         "repo": "disko",
-        "rev": "3cb78c93e6a02f494aaf6aeb37481c27a2e2ee22",
+        "rev": "96073e6423623d4a8027e9739d2af86d6422ea7a",
         "type": "github"
       },
       "original": {
@@ -20,26 +20,66 @@
         "type": "github"
       }
     },
-    "grzegorz": {
+    "fix-python": {
       "inputs": {
+        "flake-utils": "flake-utils",
         "nixpkgs": [
-          "nixpkgs-unstable"
+          "grzegorz",
+          "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1696346665,
-        "narHash": "sha256-J6Tf6a/zhFZ8SereluHLrvgPsIVm2CGHHA8wrbhZB3Y=",
-        "owner": "Programvareverkstedet",
-        "repo": "grzegorz",
-        "rev": "9b9c3ac7d408ac7c6d67544b201e6b169afacb03",
+        "lastModified": 1725463969,
+        "narHash": "sha256-d3c1TAlIN1PtK+oQP1wO6XbDfmR4SUp/C/4s7G46ARo=",
+        "owner": "GuillaumeDesforges",
+        "repo": "fix-python",
+        "rev": "2926402234c3f99aa8e4608c51d9ffa73ea403c0",
         "type": "github"
       },
       "original": {
-        "owner": "Programvareverkstedet",
-        "repo": "grzegorz",
+        "owner": "GuillaumeDesforges",
+        "repo": "fix-python",
         "type": "github"
       }
     },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1689068808,
+        "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-utils",
+        "type": "indirect"
+      }
+    },
+    "grzegorz": {
+      "inputs": {
+        "fix-python": "fix-python",
+        "nixpkgs": [