common: clean `/tmp` on boot by default

This is whitelisted to just bicep

As a side-effect it's also much easier to use synapse-admin now

base.nix

@@ -1,190 +0,0 @@
-{ config, lib, pkgs, inputs, values, ... }:
-
-{
-  imports = [
-    ./users
-    ./modules/snakeoil-certs.nix
-  ];
-
-  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
-    ripgrep
-    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";
-
-  # 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;
-
-  services.openssh = {
-    enable = true;
-    extraConfig = ''
-      PubkeyAcceptedAlgorithms=+ssh-rsa
-      Match Group wheel
-        PasswordAuthentication no
-      Match All
-    '';
-    settings.PermitRootLogin = "yes";
-  };
-
-  # 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";
-    };
-  };
-
-  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;";
-  };
-
-  # 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"
-      ];
-    };
-  };
-
-  networking.firewall.allowedTCPPorts = lib.mkIf config.services.nginx.enable [ 80 443 ];
-
-  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/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 +1,16 @@
+{ lib, values, ... }:
+{
+  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...
+  };
+}

base/nix.nix

@@ -0,0 +1,30 @@
+{ 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;
+      "pvv-nix".flake = inputs.self;
+    };
+    nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
+  };
+}

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 +1,12 @@
+{ ... }:
+{
+  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"
+    ];
+  };
+}

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;
+}

hosts/bekkalokk/configuration.nix

@@ -3,7 +3,7 @@
   imports = [
     ./hardware-configuration.nix
 
-    ../../base.nix
+    ../../base
     ../../misc/metrics-exporters.nix
 
     ./services/gitea/default.nix
@@ -32,6 +32,8 @@
     address = with values.hosts.bekkalokk; [ (ipv4 + "/25") (ipv6 + "/64") ];
   };
 
+  services.btrfs.autoScrub.enable = true;
+
   # Do not change, even during upgrades.
   # See https://search.nixos.org/options?show=system.stateVersion
   system.stateVersion = "22.11";

hosts/bicep/configuration.nix

@@ -3,7 +3,7 @@
   imports = [
     ./hardware-configuration.nix
 
-    ../../base.nix
+    ../../base
     ../../misc/metrics-exporters.nix
     ./services/nginx
 

hosts/bicep/services/matrix/mjolnir.nix

@@ -11,7 +11,7 @@
   services.mjolnir = {
     enable = true;
     pantalaimon.enable = false;
-    homeserverUrl = "http://127.0.0.1:8008";
+    homeserverUrl = "https://matrix.pvv.ntnu.no";
     accessTokenFile = config.sops.secrets."matrix/mjolnir/access_token".path;
     managementRoom = "!gsdeCoWjvYRBrzuiRq:pvv.ntnu.no";
     protectedRooms = map (a: "https://matrix.to/#/${a}") [

hosts/bicep/services/matrix/synapse.nix

@@ -157,6 +157,18 @@ in {
       '';
     };
   }
+  {
+    locations."/_synapse/admin" = {
+      proxyPass = "http://$synapse_backend";
+      extraConfig = ''
+        allow 127.0.0.1;
+        allow ::1;
+        allow ${values.hosts.bicep.ipv4};
+        allow ${values.hosts.bicep.ipv6};
+        deny all;
+      '';
+    };
+  }
   {
     locations = let
       connectionInfo = w: matrix-lib.workerConnectionResource "metrics" w;

hosts/bob/configuration.nix

@@ -3,7 +3,7 @@
   imports = [
       # Include the results of the hardware scan.
       ./hardware-configuration.nix
-      ../../base.nix
+      ../../base
       ../../misc/metrics-exporters.nix
       ./disks.nix
 

hosts/brzeczyszczykiewicz/configuration.nix

@@ -3,7 +3,7 @@
   imports = [
       # Include the results of the hardware scan.
       ./hardware-configuration.nix
-      ../../base.nix
+      ../../base
       ../../misc/metrics-exporters.nix
 
       ./services/grzegorz.nix

hosts/buskerud/configuration.nix

@@ -2,7 +2,7 @@
 {
   imports = [
     ./hardware-configuration.nix
-    ../../base.nix
+    ../../base
     ../../misc/metrics-exporters.nix
 
     ./services/libvirt.nix

hosts/georg/configuration.nix

@@ -3,7 +3,7 @@
   imports = [
       # Include the results of the hardware scan.
       ./hardware-configuration.nix
-      ../../base.nix
+      ../../base
       ../../misc/metrics-exporters.nix
 
       ../../modules/grzegorz.nix

hosts/ildkule/configuration.nix

@@ -3,7 +3,7 @@
   imports = [
       # Include the results of the hardware scan.
       ./hardware-configuration.nix
-      ../../base.nix
+      ../../base
       ../../misc/metrics-exporters.nix
 
       ./services/monitoring

hosts/shark/configuration.nix

@@ -3,7 +3,7 @@
   imports = [
       # Include the results of the hardware scan.
       ./hardware-configuration.nix
-      ../../base.nix
+      ../../base
       ../../misc/metrics-exporters.nix
     ];