add aspects/hosts/ configurations

Host-specific NixOS configurations for:
- alexandria (server)
- io (desktop)
- rotterdam (desktop)
- trantor (server, aarch64)

Each host has a main config file and _hostname/ directory
with hardware-configuration and other host-specific modules.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

aspects/hosts/_alexandria/hardware-configuration.nix

@@ -0,0 +1,49 @@
+{
+  config,
+  lib,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
+
+  boot = {
+    initrd = {
+      availableKernelModules = [
+        "xhci_pci"
+        "ahci"
+        "usbhid"
+        "usb_storage"
+        "sd_mod"
+      ];
+      kernelModules = [ ];
+    };
+    kernelModules = [ "kvm-intel" ];
+    extraModulePackages = [ ];
+  };
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-uuid/31289617-1d84-4432-a833-680b52e88525";
+      fsType = "ext4";
+    };
+    "/boot" = {
+      device = "/dev/disk/by-uuid/4130-BE54";
+      fsType = "vfat";
+    };
+  };
+
+  swapDevices = [
+    {
+      device = "/swapfile";
+      size = 8192;
+    }
+  ];
+
+  networking.useDHCP = lib.mkDefault true;
+
+  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
+
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

aspects/hosts/_alexandria/jellyfin.nix

@@ -0,0 +1,15 @@
+{ lib, inputs, ... }:
+let
+  utils = import ../../../utils.nix { inherit inputs lib; };
+  inherit (utils) mkNginxVHosts;
+in
+{
+  services.jellyfin = {
+    enable = true;
+    openFirewall = true;
+  };
+
+  services.nginx.virtualHosts = mkNginxVHosts {
+    domains."jellyfin.baduhai.dev".locations."/".proxyPass = "http://127.0.0.1:8096/";
+  };
+}

aspects/hosts/_alexandria/kanidm.nix

@@ -0,0 +1,83 @@
+{
+  config,
+  lib,
+  inputs,
+  pkgs,
+  ...
+}:
+
+let
+  utils = import ../../../utils.nix { inherit inputs lib; };
+  inherit (utils) mkNginxVHosts;
+  kanidmCertDir = "/var/lib/kanidm/certs";
+in
+
+{
+  services.kanidm = {
+    enableServer = true;
+    enableClient = true;
+    package = pkgs.kanidm;
+
+    serverSettings = {
+      domain = "auth.baduhai.dev";
+      origin = "https://auth.baduhai.dev";
+      bindaddress = "127.0.0.1:8443";
+      ldapbindaddress = "127.0.0.1:636";
+      trust_x_forward_for = true;
+      # Use self-signed certificates for internal TLS
+      tls_chain = "${kanidmCertDir}/cert.pem";
+      tls_key = "${kanidmCertDir}/key.pem";
+    };
+
+    clientSettings = {
+      uri = "https://auth.baduhai.dev";
+    };
+  };
+
+  services.nginx.virtualHosts = mkNginxVHosts {
+    domains."auth.baduhai.dev" = {
+      locations."/" = {
+        proxyPass = "https://127.0.0.1:8443";
+        extraConfig = ''
+          proxy_ssl_verify off;
+          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+          proxy_set_header X-Forwarded-Proto $scheme;
+          proxy_set_header Host $host;
+        '';
+      };
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = [ 636 ];
+
+  # Generate self-signed certificates for kanidm's internal TLS
+  systemd.services.kanidm-generate-certs = {
+    description = "Generate self-signed TLS certificates for Kanidm";
+    wantedBy = [ "multi-user.target" ];
+    before = [ "kanidm.service" ];
+    serviceConfig = {
+      Type = "oneshot";
+      RemainAfterExit = true;
+    };
+    script = ''
+      mkdir -p ${kanidmCertDir}
+      if [ ! -f ${kanidmCertDir}/key.pem ]; then
+        ${pkgs.openssl}/bin/openssl req -x509 -newkey rsa:4096 \
+          -keyout ${kanidmCertDir}/key.pem \
+          -out ${kanidmCertDir}/cert.pem \
+          -days 3650 -nodes \
+          -subj "/CN=localhost" \
+          -addext "subjectAltName=DNS:localhost,IP:127.0.0.1"
+        chown -R kanidm:kanidm ${kanidmCertDir}
+        chmod 600 ${kanidmCertDir}/key.pem
+        chmod 644 ${kanidmCertDir}/cert.pem
+      fi
+    '';
+  };
+
+  # Ensure certificate generation runs before kanidm starts
+  systemd.services.kanidm = {
+    after = [ "kanidm-generate-certs.service" ];
+    wants = [ "kanidm-generate-certs.service" ];
+  };
+}

aspects/hosts/_alexandria/nextcloud.nix

@@ -0,0 +1,97 @@
+{
+  lib,
+  config,
+  pkgs,
+  inputs,
+  ...
+}:
+
+let
+  utils = import ../../../utils.nix { inherit inputs lib; };
+  inherit (utils) mkNginxVHosts;
+in
+
+{
+  services = {
+    nextcloud = {
+      enable = true;
+      package = pkgs.nextcloud32;
+      datadir = "/data/nextcloud";
+      hostName = "cloud.baduhai.dev";
+      configureRedis = true;
+      https = true;
+      secretFile = config.age.secrets."nextcloud-secrets.json".path;
+      database.createLocally = true;
+      maxUploadSize = "16G";
+      extraApps = {
+        inherit (config.services.nextcloud.package.packages.apps)
+          calendar
+          contacts
+          notes
+          tasks
+          user_oidc
+          ;
+      };
+      extraAppsEnable = true;
+      caching = {
+        apcu = true;
+        redis = true;
+      };
+      settings = {
+        trusted_proxies = [ "127.0.0.1" ];
+        default_phone_region = "BR";
+        maintenance_window_start = "4";
+        allow_local_remote_servers = true;
+        enabledPreviewProviders = [
+          "OC\\Preview\\BMP"
+          "OC\\Preview\\EMF"
+          "OC\\Preview\\Font"
+          "OC\\Preview\\GIF"
+          "OC\\Preview\\HEIC"
+          "OC\\Preview\\Illustrator"
+          "OC\\Preview\\JPEG"
+          "OC\\Preview\\Krita"
+          "OC\\Preview\\MarkDown"
+          "OC\\Preview\\Movie"
+          "OC\\Preview\\MP3"
+          "OC\\Preview\\MSOffice2003"
+          "OC\\Preview\\MSOffice2007"
+          "OC\\Preview\\MSOfficeDoc"
+          "OC\\Preview\\OpenDocument"
+          "OC\\Preview\\PDF"
+          "OC\\Preview\\Photoshop"
+          "OC\\Preview\\PNG"
+          "OC\\Preview\\Postscript"
+          "OC\\Preview\\SVG"
+          "OC\\Preview\\TIFF"
+          "OC\\Preview\\TXT"
+          "OC\\Preview\\XBitmap"
+        ];
+      };
+      config = {
+        dbtype = "pgsql";
+        adminpassFile = config.age.secrets.nextcloud-adminpass.path;
+      };
+      phpOptions = {
+        "opcache.interned_strings_buffer" = "16";
+      };
+    };
+
+    nginx.virtualHosts = mkNginxVHosts {
+      domains."cloud.baduhai.dev" = { };
+    };
+  };
+
+  age.secrets = {
+    "nextcloud-secrets.json" = {
+      file = ../../../secrets/nextcloud-secrets.json.age;
+      owner = "nextcloud";
+      group = "nextcloud";
+    };
+    nextcloud-adminpass = {
+      file = ../../../secrets/nextcloud-adminpass.age;
+      owner = "nextcloud";
+      group = "nextcloud";
+    };
+  };
+}

aspects/hosts/_alexandria/nginx.nix

@@ -0,0 +1,59 @@
+{
+  config,
+  lib,
+  inputs,
+  ...
+}:
+
+let
+  utils = import ../../../utils.nix { inherit inputs lib; };
+  inherit (utils) mkNginxVHosts services;
+
+  # Get all unique domains from shared services that have LAN IPs (served by this host)
+  localDomains = lib.unique (map (s: s.domain) (lib.filter (s: s.host == "alexandria") services));
+
+  # Generate ACME cert configs for all local domains
+  acmeCerts = lib.genAttrs localDomains (domain: {
+    group = "nginx";
+  });
+in
+
+{
+  security.acme = {
+    acceptTerms = true;
+    defaults = {
+      email = "baduhai@proton.me";
+      dnsResolver = "1.1.1.1:53";
+      dnsProvider = "cloudflare";
+      credentialsFile = config.age.secrets.cloudflare.path;
+    };
+    certs = acmeCerts;
+  };
+
+  services.nginx = {
+    enable = true;
+    recommendedGzipSettings = true;
+    recommendedOptimisation = true;
+    recommendedProxySettings = true;
+    recommendedTlsSettings = true;
+    virtualHosts = {
+      "_" = {
+        default = true;
+        locations."/".return = "444";
+      };
+    };
+  };
+
+  users.users.nginx.extraGroups = [ "acme" ];
+
+  networking.firewall.allowedTCPPorts = [
+    80
+    443
+  ];
+
+  age.secrets.cloudflare = {
+    file = ../../../secrets/cloudflare.age;
+    owner = "nginx";
+    group = "nginx";
+  };
+}

aspects/hosts/_alexandria/unbound.nix

@@ -0,0 +1,58 @@
+{ inputs, lib, ... }:
+
+let
+  utils = import ../../../utils.nix { inherit inputs lib; };
+in
+
+{
+  services.unbound = {
+    enable = true;
+    enableRootTrustAnchor = true;
+    settings = {
+      server = {
+        interface = [
+          "0.0.0.0"
+          "::"
+        ];
+        access-control = [
+          "127.0.0.0/8 allow"
+          "192.168.0.0/16 allow"
+          "::1/128 allow"
+        ];
+
+        num-threads = 2;
+        msg-cache-size = "50m";
+        rrset-cache-size = "100m";
+        cache-min-ttl = 300;
+        cache-max-ttl = 86400;
+        prefetch = true;
+        prefetch-key = true;
+        hide-identity = true;
+        hide-version = true;
+        so-rcvbuf = "1m";
+        so-sndbuf = "1m";
+
+        # LAN-only DNS records
+        local-zone = ''"baduhai.dev." transparent'';
+        local-data = map (e: ''"${e.domain}. IN A ${e.lanIP}"'')
+          (lib.filter (e: e ? lanIP) utils.services);
+      };
+
+      forward-zone = [
+        {
+          name = ".";
+          forward-addr = [
+            "1.1.1.1@853#cloudflare-dns.com"
+            "1.0.0.1@853#cloudflare-dns.com"
+          ];
+          forward-tls-upstream = true;
+        }
+      ];
+    };
+  };
+
+  networking.firewall = {
+    allowedTCPPorts = [ 53 ];
+    allowedUDPPorts = [ 53 ];
+  };
+}

aspects/hosts/_alexandria/vaultwarden.nix

@@ -0,0 +1,26 @@
+{
+  config,
+  lib,
+  inputs,
+  ...
+}:
+let
+  utils = import ../../../utils.nix { inherit inputs lib; };
+  inherit (utils) mkNginxVHosts;
+in
+{
+  services.vaultwarden = {
+    enable = true;
+    config = {
+      DOMAIN = "https://pass.baduhai.dev";
+      SIGNUPS_ALLOWED = false;
+      ROCKET_ADDRESS = "127.0.0.1";
+      ROCKET_PORT = 58222;
+    };
+  };
+
+  services.nginx.virtualHosts = mkNginxVHosts {
+    domains."pass.baduhai.dev".locations."/".proxyPass =
+      "http://${config.services.vaultwarden.config.ROCKET_ADDRESS}:${toString config.services.vaultwarden.config.ROCKET_PORT}/";
+  };
+}