base.nix: split into multiple files

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/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 +1,13 @@
+{ ... }:
+{
+  services.openssh = {
+    enable = true;
+    extraConfig = ''
+      PubkeyAcceptedAlgorithms=+ssh-rsa
+      Match Group wheel
+        PasswordAuthentication no
+      Match All
+    '';
+    settings.PermitRootLogin = "yes";
+  };
+}

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;
+}