minecraft: update mods + add modernfix + debugify

Applies patch from: https://forgejo.ellis.link/continuwuation/continuwuity/pulls/1370
That I am working on. Also updates version to latest (at this time) git

configuration.nix

@@ -19,6 +19,7 @@
     ./modules/secureboot.nix
     ./modules/no-rgb.nix
     ./modules/security.nix
+    ./modules/ntfy-alerts.nix
 
     ./services/postgresql.nix
     ./services/jellyfin.nix
@@ -32,6 +33,14 @@
     ./services/jellyfin-qbittorrent-monitor.nix
     ./services/bitmagnet.nix
 
+    ./services/arr/prowlarr.nix
+    ./services/arr/sonarr.nix
+    ./services/arr/radarr.nix
+    ./services/arr/bazarr.nix
+    ./services/arr/jellyseerr.nix
+    ./services/arr/recyclarr.nix
+    ./services/arr/init.nix
+
     ./services/soulseek.nix
 
     ./services/ups.nix
@@ -55,6 +64,7 @@
     ./services/syncthing.nix
 
     ./services/ntfy.nix
+    ./services/ntfy-alerts.nix
   ];
 
   services.kmscon.enable = true;
@@ -123,6 +133,37 @@
       compressor = "zstd";
       supportedFilesystems = [ "f2fs" ];
     };
+
+    # BBR congestion control handles variable-latency VPN connections much
+    # better than CUBIC by probing bandwidth continuously rather than
+    # reacting to packet loss.
+    kernelModules = [ "tcp_bbr" ];
+
+    kernel.sysctl = {
+      # Use BBR + fair queuing for smooth throughput through the WireGuard VPN
+      "net.core.default_qdisc" = "fq";
+      "net.ipv4.tcp_congestion_control" = "bbr";
+
+      # Disable slow-start after idle: prevents TCP from resetting window
+      # size on each burst cycle (the primary cause of the 0 -> 40 MB/s spikes)
+      "net.ipv4.tcp_slow_start_after_idle" = 0;
+
+      # Larger socket buffers to accommodate the VPN bandwidth-delay product
+      # (22ms RTT * target throughput). Current 2.5MB max is too small.
+      "net.core.rmem_max" = 16777216;
+      "net.core.wmem_max" = 16777216;
+      "net.ipv4.tcp_rmem" = "4096 87380 16777216";
+      "net.ipv4.tcp_wmem" = "4096 65536 16777216";
+
+      # Higher backlog for the large number of concurrent torrent connections
+      "net.core.netdev_max_backlog" = 5000;
+
+      # Minecraft server optimizations
+      # Disable autogroup for better scheduling of game server threads
+      "kernel.sched_autogroup_enabled" = 0;
+      # Huge pages for Minecraft JVM (4000MB heap / 2MB per page + ~200 overhead)
+      "vm.nr_hugepages" = 2200;
+    };
   };
 
   environment.etc = {
@@ -192,6 +233,7 @@
     hostName = hostname;
     hostId = "0f712d56";
     firewall.enable = true;
+    firewall.trustedInterfaces = [ "wg-br" ];
     useDHCP = false;
     enableIPv6 = false;
 

flake.lock

@@ -25,13 +25,33 @@
         "type": "github"
       }
     },
+    "arr-init": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1772249948,
+        "narHash": "sha256-v68tO12mTCET68eZG583U+OlBL4f6kAoHS9iKA/xLzQ=",
+        "ref": "refs/heads/main",
+        "rev": "d21eb9f5b0a30bb487de7c0afbbbaf19324eaa49",
+        "revCount": 1,
+        "type": "git",
+        "url": "ssh://gitea@git.gardling.com/titaniumtown/arr-init"
+      },
+      "original": {
+        "type": "git",
+        "url": "ssh://gitea@git.gardling.com/titaniumtown/arr-init"
+      }
+    },
     "crane": {
       "locked": {
-        "lastModified": 1770419512,
+        "lastModified": 1771796463,
-        "narHash": "sha256-o8Vcdz6B6bkiGUYkZqFwH3Pv1JwZyXht3dMtS7RchIo=",
+        "narHash": "sha256-9bCDuUzpwJXcHMQYMS1yNuzYMmKO/CCwCexpjWOl62I=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "2510f2cbc3ccd237f700bb213756a8f35c32d8d7",
+        "rev": "3d3de3313e263e04894f284ac18177bd26169bad",
         "type": "github"
       },
       "original": {
@@ -69,11 +89,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1769524058,
+        "lastModified": 1771881364,
-        "narHash": "sha256-zygdD6X1PcVNR2PsyK4ptzrVEiAdbMqLos7utrMDEWE=",
+        "narHash": "sha256-A5uE/hMium5of/QGC6JwF5TGoDAfpNtW00T0s9u/PN8=",
         "owner": "nix-community",
         "repo": "disko",
-        "rev": "71a3fc97d80881e91710fe721f1158d3b96ae14d",
+        "rev": "a4cb7bf73f264d40560ba527f9280469f1f081c6",
         "type": "github"
       },
       "original": {
@@ -177,11 +197,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1770260404,
+        "lastModified": 1772020340,
-        "narHash": "sha256-3iVX1+7YUIt23hBx1WZsUllhbmP2EnXrV8tCRbLxHc8=",
+        "narHash": "sha256-aqBl3GNpCadMoJ/hVkWTijM1Aeilc278MjM+LA3jK6g=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "0d782ee42c86b196acff08acfbf41bb7d13eed5b",
+        "rev": "36e38ca0d9afe4c55405fdf22179a5212243eecc",
         "type": "github"
       },
       "original": {
@@ -243,11 +263,11 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1770734117,
+        "lastModified": 1772216104,
-        "narHash": "sha256-PNXSnK507MRj+hYMgnUR7InNJzVCmOfsjHV4YXZgpwQ=",
+        "narHash": "sha256-1TnGN26vnCEQk5m4AavJZxGZTb/6aZyphemRPRwFUfs=",
         "owner": "nix-community",
         "repo": "lanzaboote",
-        "rev": "2038a9a19adb886eccba775321b055fdbdc5029d",
+        "rev": "dbe5112de965bbbbff9f0729a9789c20a65ab047",
         "type": "github"
       },
       "original": {
@@ -265,11 +285,11 @@
         "systems": "systems_3"
       },
       "locked": {
-        "lastModified": 1770864818,
+        "lastModified": 1772160153,
-        "narHash": "sha256-VsRzFJ8+ndGgcwguZSQGHed/gragpW478qMqdNpm75k=",
+        "narHash": "sha256-lk5IxQzY9ZeeEyjKNT7P6dFnlRpQgkus4Ekc/+slypY=",
         "owner": "Infinidoge",
         "repo": "nix-minecraft",
-        "rev": "ca04d472340d6a3c8fe4f4a9c0d74faad048c204",
+        "rev": "deca3fb710b502ba10cd5cdc8f66c2cc184b92df",
         "type": "github"
       },
       "original": {
@@ -280,11 +300,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1770882871,
+        "lastModified": 1771969195,
-        "narHash": "sha256-nw5g+xl3veea+maxJ2/81tMEA/rPq9aF1H5XF35X+OE=",
+        "narHash": "sha256-qwcDBtrRvJbrrnv1lf/pREQi8t2hWZxVAyeMo7/E9sw=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "af04cb78aa85b2a4d1c15fc7270347e0d0eda97b",
+        "rev": "41c6b421bdc301b2624486e11905c9af7b8ec68e",
         "type": "github"
       },
       "original": {
@@ -296,11 +316,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1770770419,
+        "lastModified": 1772047000,
-        "narHash": "sha256-iKZMkr6Cm9JzWlRYW/VPoL0A9jVKtZYiU4zSrVeetIs=",
+        "narHash": "sha256-7DaQVv4R97cii/Qdfy4tmDZMB2xxtyIvNGSwXBBhSmo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6c5e707c6b5339359a9a9e215c5e66d6d802fd7a",
+        "rev": "1267bb4920d0fc06ea916734c11b0bf004bbe17e",
         "type": "github"
       },
       "original": {
@@ -336,11 +356,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1769939035,
+        "lastModified": 1771858127,
-        "narHash": "sha256-Fok2AmefgVA0+eprw2NDwqKkPGEI5wvR+twiZagBvrg=",
+        "narHash": "sha256-Gtre9YoYl3n25tJH2AoSdjuwcqij5CPxL3U3xysYD08=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "a8ca480175326551d6c4121498316261cbb5b260",
+        "rev": "49bbbfc218bf3856dfa631cead3b052d78248b83",
         "type": "github"
       },
       "original": {
@@ -352,6 +372,7 @@
     "root": {
       "inputs": {
         "agenix": "agenix",
+        "arr-init": "arr-init",
         "deploy-rs": "deploy-rs",
         "disko": "disko",
         "home-manager": "home-manager",
@@ -376,11 +397,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1770520253,
+        "lastModified": 1771988922,
-        "narHash": "sha256-6rWuHgSENXKnC6HGGAdRolQrnp/8IzscDn7FQEo1uEQ=",
+        "narHash": "sha256-Fc6FHXtfEkLtuVJzd0B6tFYMhmcPLuxr90rWfb/2jtQ=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "ebb8a141f60bb0ec33836333e0ca7928a072217f",
+        "rev": "f4443dc3f0b6c5e6b77d923156943ce816d1fcb9",
         "type": "github"
       },
       "original": {
@@ -413,11 +434,11 @@
     "senior_project-website": {
       "flake": false,
       "locked": {
-        "lastModified": 1769471280,
+        "lastModified": 1771869552,
-        "narHash": "sha256-6BADVRSHHwO3NcAua44hagAJTqPNDxEhPjBMehURiHQ=",
+        "narHash": "sha256-veaVrRWCSy7HYAAjUFLw8HASKcj+3f0W+sCwS3QiaM4=",
         "owner": "Titaniumtown",
         "repo": "senior-project-website",
-        "rev": "d6f443ede6c90a049085b4598e438849e19e74f4",
+        "rev": "28a2b93492dac877dce0b38f078eacf74fce26e7",
         "type": "github"
       },
       "original": {
@@ -433,11 +454,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1770891763,
+        "lastModified": 1772071250,
-        "narHash": "sha256-Ojjyo+W6hjRwvMjqlVuUnht9HzkCDfKJUL5A9zl1KcQ=",
+        "narHash": "sha256-LDWvJDR1J8xE8TBJjzWnOA0oVP/l9xBFC4npQPJDHN4=",
         "owner": "nix-community",
         "repo": "srvos",
-        "rev": "6c9ab8473c11c6ab113aa61b86595cbd5ec8aed7",
+        "rev": "5cd73bcf984b72d8046e1175d13753de255adfb9",
         "type": "github"
       },
       "original": {
@@ -509,11 +530,11 @@
     "trackerlist": {
       "flake": false,
       "locked": {
-        "lastModified": 1770851384,
+        "lastModified": 1772233783,
-        "narHash": "sha256-BWxwBWi/FZegNOSwvwjmo/7JaYppwSMLjCvEBxoL90E=",
+        "narHash": "sha256-2jPUBKpPuT4dCXwVFuZvTH3QyURixsfJZD7Zqs0atPY=",
         "owner": "ngosang",
         "repo": "trackerslist",
-        "rev": "c38ed0d4ce262e2dc699d15ccca260fc869452d9",
+        "rev": "85c4f103f130b070a192343c334f50c2f56b61a9",
         "type": "github"
       },
       "original": {

flake.nix

@@ -68,6 +68,11 @@
     ytbn-graphing-software = {
       url = "git+https://git.gardling.com/titaniumtown/YTBN-Graphing-Software";
     };
+
+    arr-init = {
+      url = "git+ssh://gitea@git.gardling.com/titaniumtown/arr-init";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =
@@ -83,7 +88,7 @@
       srvos,
       deploy-rs,
       impermanence,
-      agenix,
+      arr-init,
       ...
     }@inputs:
     let
@@ -125,6 +130,11 @@
           ntfy = 2586;
           livekit = 7880;
           lk_jwt = 8081;
+          prowlarr = 9696;
+          sonarr = 8989;
+          radarr = 7878;
+          bazarr = 6767;
+          jellyseerr = 5055;
         };
 
         https = {
@@ -193,6 +203,35 @@
           signalBackupDir = "/${zpool_ssds}/bak/signal";
           grayjayBackupDir = "/${zpool_ssds}/bak/grayjay";
         };
+
+        prowlarr = {
+          dataDir = services_dir + "/prowlarr";
+        };
+
+        sonarr = {
+          dataDir = services_dir + "/sonarr";
+        };
+
+        radarr = {
+          dataDir = services_dir + "/radarr";
+        };
+
+        bazarr = {
+          dataDir = services_dir + "/bazarr";
+        };
+
+        jellyseerr = {
+          configDir = services_dir + "/jellyseerr";
+        };
+
+        recyclarr = {
+          dataDir = services_dir + "/recyclarr";
+        };
+
+        media = {
+          moviesDir = torrents_path + "/media/movies";
+          tvDir = torrents_path + "/media/tv";
+        };
       };
 
       pkgs = import nixpkgs {
@@ -201,6 +240,10 @@
         buildPlatform = builtins.currentSystem;
       };
       lib = import ./modules/lib.nix { inherit inputs pkgs service_configs; };
+      testSuite = import ./tests/tests.nix {
+        inherit pkgs lib inputs;
+        config = self.nixosConfigurations.muffin.config;
+      };
     in
     {
       formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-tree;
@@ -257,6 +300,8 @@
 
           lanzaboote.nixosModules.lanzaboote
 
+          arr-init.nixosModules.default
+
           home-manager.nixosModules.home-manager
           (
             {
@@ -285,14 +330,9 @@
         };
       };
 
-      packages.${system} =
+      checks.${system} = testSuite;
-        let
+
-          testSuite = import ./tests/tests.nix {
+      packages.${system} = {
-            inherit pkgs lib inputs;
-            config = self.nixosConfigurations.muffin.config;
-          };
-        in
-        {
         tests = pkgs.linkFarm "all-tests" (
           pkgs.lib.mapAttrsToList (name: test: {
             name = name;

modules/age-secrets.nix

@@ -65,5 +65,20 @@
       owner = "root";
       group = "root";
     };
+
+    # ntfy-alerts secrets
+    ntfy-alerts-topic = {
+      file = ../secrets/ntfy-alerts-topic.age;
+      mode = "0400";
+      owner = "root";
+      group = "root";
+    };
+
+    ntfy-alerts-token = {
+      file = ../secrets/ntfy-alerts-token.age;
+      mode = "0400";
+      owner = "root";
+      group = "root";
+    };
   };
 }

modules/lib.nix

@@ -160,7 +160,9 @@ inputs.nixpkgs.lib.extend (
       serviceName: tmpfilesRules:
       { pkgs, ... }:
       let
-        confFile = pkgs.writeText "${serviceName}-file-perms.conf" (lib.concatStringsSep "\n" tmpfilesRules);
+        confFile = pkgs.writeText "${serviceName}-file-perms.conf" (
+          lib.concatStringsSep "\n" tmpfilesRules
+        );
       in
       {
         systemd.services."${serviceName}-file-perms" = {

modules/ntfy-alerts.nix

@@ -0,0 +1,132 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.services.ntfyAlerts;
+
+  curl = "${pkgs.curl}/bin/curl";
+  hostname = config.networking.hostName;
+
+  # Build the curl auth args as a proper bash array fragment
+  authCurlArgs =
+    if cfg.tokenFile != null then
+      ''
+        if [ -f "${cfg.tokenFile}" ]; then
+          TOKEN=$(cat "${cfg.tokenFile}" 2>/dev/null || echo "")
+          if [ -n "$TOKEN" ]; then
+            AUTH_ARGS=(-H "Authorization: Bearer $TOKEN")
+          fi
+        fi
+      ''
+    else
+      "";
+
+  # Systemd failure alert script
+  systemdAlertScript = pkgs.writeShellScript "ntfy-systemd-alert" ''
+    set -euo pipefail
+
+    UNIT_NAME="$1"
+    SERVER_URL="${cfg.serverUrl}"
+    TOPIC=$(cat "${cfg.topicFile}" 2>/dev/null | tr -d '[:space:]')
+    if [ -z "$TOPIC" ]; then
+      echo "ERROR: Could not read topic from ${cfg.topicFile}"
+      exit 1
+    fi
+
+    # Get journal output for context
+    JOURNAL_OUTPUT=$(${pkgs.systemd}/bin/journalctl -u "$UNIT_NAME" -n 15 --no-pager 2>/dev/null || echo "No journal output available")
+
+    # Build auth args
+    AUTH_ARGS=()
+    ${authCurlArgs}
+
+    # Send notification
+    ${curl} -sf --max-time 15 -X POST \
+      "$SERVER_URL/$TOPIC" \
+      -H "Title: [${hostname}] Service failed: $UNIT_NAME" \
+      -H "Priority: high" \
+      -H "Tags: warning" \
+      "''${AUTH_ARGS[@]}" \
+      -d "$JOURNAL_OUTPUT" || true
+  '';
+
+in
+{
+  options.services.ntfyAlerts = {
+    enable = lib.mkEnableOption "ntfy push notifications for system alerts";
+
+    serverUrl = lib.mkOption {
+      type = lib.types.str;
+      description = "The ntfy server URL (e.g. https://ntfy.example.com)";
+      example = "https://ntfy.example.com";
+    };
+
+    topicFile = lib.mkOption {
+      type = lib.types.path;
+      description = "Path to a file containing the ntfy topic name to publish alerts to.";
+      example = "/run/agenix/ntfy-alerts-topic";
+    };
+
+    tokenFile = lib.mkOption {
+      type = lib.types.nullOr lib.types.path;
+      default = null;
+      description = ''
+        Path to a file containing the ntfy auth token.
+        If set, uses Authorization: Bearer header for authentication.
+      '';
+      example = "/run/secrets/ntfy-token";
+    };
+
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Per-service OnFailure for monitored services
+    systemd.services = {
+      "ntfy-alert@" = {
+        description = "Send ntfy notification for failed service %i";
+
+        unitConfig.OnFailure = lib.mkForce "";
+
+        serviceConfig = {
+          Type = "oneshot";
+          ExecStart = "${systemdAlertScript} %i";
+          TimeoutSec = 30;
+        };
+      };
+
+      # TODO: sanoid's ExecStartPre runs `zfs allow` which blocks on TXG sync;
+      # on the hdds pool (slow spinning disks + large async frees) this causes
+      # 30+ minute hangs and guaranteed timeouts. Suppress until we fix sanoid
+      # to run as root without `zfs allow`. See: nixpkgs#72060, openzfs/zfs#14180
+      "sanoid".unitConfig.OnFailure = lib.mkForce "";
+    };
+
+    # Global OnFailure drop-in for all services
+    systemd.packages = [
+      (pkgs.writeTextDir "etc/systemd/system/service.d/onfailure.conf" ''
+        [Unit]
+        OnFailure=ntfy-alert@%p.service
+      '')
+
+      # Sanoid-specific drop-in to override the global OnFailure (see TODO above)
+      (pkgs.writeTextDir "etc/systemd/system/sanoid.service.d/onfailure.conf" ''
+        [Unit]
+        OnFailure=
+      '')
+    ];
+    # ZED (ZFS Event Daemon) ntfy notification settings
+    services.zfs.zed = {
+      enableMail = false;
+      settings = {
+        ZED_NTFY_URL = cfg.serverUrl;
+        ZED_NTFY_TOPIC = "$(cat ${cfg.topicFile} | tr -d '[:space:]')";
+        ZED_NTFY_ACCESS_TOKEN = lib.mkIf (cfg.tokenFile != null) "$(cat ${cfg.tokenFile})";
+        ZED_NOTIFY_VERBOSE = true;
+      };
+    };
+
+  };
+}

modules/zfs.nix

@@ -64,7 +64,7 @@ in
       yearly = 0;
     };
 
-    datasets."${service_configs.zpool_ssds}/services/jellyfin_cache" = {
+    datasets."${service_configs.zpool_ssds}/services/jellyfin/cache" = {
       recursive = true;
       autoprune = true;
       autosnap = true;

services/arr/bazarr.nix

@@ -0,0 +1,34 @@
+{
+  pkgs,
+  config,
+  service_configs,
+  lib,
+  ...
+}:
+{
+  imports = [
+    (lib.serviceMountWithZpool "bazarr" service_configs.zpool_ssds [
+      service_configs.bazarr.dataDir
+    ])
+    (lib.serviceMountWithZpool "bazarr" service_configs.zpool_hdds [
+      service_configs.torrents_path
+    ])
+    (lib.serviceFilePerms "bazarr" [
+      "Z ${service_configs.bazarr.dataDir} 0700 ${config.services.bazarr.user} ${config.services.bazarr.group}"
+    ])
+  ];
+
+  services.bazarr = {
+    enable = true;
+    listenPort = service_configs.ports.bazarr;
+  };
+
+  services.caddy.virtualHosts."bazarr.${service_configs.https.domain}".extraConfig = ''
+    import ${config.age.secrets.caddy_auth.path}
+    reverse_proxy :${builtins.toString service_configs.ports.bazarr}
+  '';
+
+  users.users.${config.services.bazarr.user}.extraGroups = [
+    service_configs.media_group
+  ];
+}

services/arr/init.nix

@@ -0,0 +1,115 @@
+{ config, service_configs, ... }:
+{
+  services.arrInit = {
+    prowlarr = {
+      enable = true;
+      serviceName = "prowlarr";
+      port = service_configs.ports.prowlarr;
+      dataDir = service_configs.prowlarr.dataDir;
+      apiVersion = "v1";
+      networkNamespacePath = "/run/netns/wg";
+      syncedApps = [
+        {
+          name = "Sonarr";
+          implementation = "Sonarr";
+          configContract = "SonarrSettings";
+          prowlarrUrl = "http://localhost:${builtins.toString service_configs.ports.prowlarr}";
+          baseUrl = "http://${config.vpnNamespaces.wg.bridgeAddress}:${builtins.toString service_configs.ports.sonarr}";
+          apiKeyFrom = "${service_configs.sonarr.dataDir}/config.xml";
+          syncCategories = [
+            5000
+            5010
+            5020
+            5030
+            5040
+            5045
+            5050
+            5090
+          ];
+          serviceName = "sonarr";
+        }
+        {
+          name = "Radarr";
+          implementation = "Radarr";
+          configContract = "RadarrSettings";
+          prowlarrUrl = "http://localhost:${builtins.toString service_configs.ports.prowlarr}";
+          baseUrl = "http://${config.vpnNamespaces.wg.bridgeAddress}:${builtins.toString service_configs.ports.radarr}";
+          apiKeyFrom = "${service_configs.radarr.dataDir}/config.xml";
+          syncCategories = [
+            2000
+            2010
+            2020
+            2030
+            2040
+            2045
+            2050
+            2060
+            2070
+            2080
+          ];
+          serviceName = "radarr";
+        }
+      ];
+    };
+
+    sonarr = {
+      enable = true;
+      serviceName = "sonarr";
+      port = service_configs.ports.sonarr;
+      dataDir = service_configs.sonarr.dataDir;
+      rootFolders = [ service_configs.media.tvDir ];
+      downloadClients = [
+        {
+          name = "qBittorrent";
+          implementation = "QBittorrent";
+          configContract = "QBittorrentSettings";
+          fields = {
+            host = config.vpnNamespaces.wg.namespaceAddress;
+            port = service_configs.ports.torrent;
+            useSsl = false;
+            tvCategory = "tvshows";
+          };
+        }
+      ];
+    };
+
+    radarr = {
+      enable = true;
+      serviceName = "radarr";
+      port = service_configs.ports.radarr;
+      dataDir = service_configs.radarr.dataDir;
+      rootFolders = [ service_configs.media.moviesDir ];
+      downloadClients = [
+        {
+          name = "qBittorrent";
+          implementation = "QBittorrent";
+          configContract = "QBittorrentSettings";
+          fields = {
+            host = config.vpnNamespaces.wg.namespaceAddress;
+            port = service_configs.ports.torrent;
+            useSsl = false;
+            movieCategory = "movies";
+          };
+        }
+      ];
+    };
+  };
+
+  services.bazarrInit = {
+    enable = true;
+    dataDir = "/var/lib/bazarr";
+    port = service_configs.ports.bazarr;
+    sonarr = {
+      enable = true;
+      dataDir = service_configs.sonarr.dataDir;
+      port = service_configs.ports.sonarr;
+      serviceName = "sonarr";
+    };
+    radarr = {
+      enable = true;
+      dataDir = service_configs.radarr.dataDir;
+      port = service_configs.ports.radarr;
+      serviceName = "radarr";
+    };
+  };
+}

services/arr/jellyseerr.nix

@@ -0,0 +1,43 @@
+{
+  pkgs,
+  config,
+  service_configs,
+  lib,
+  ...
+}:
+{
+  imports = [
+    (lib.serviceMountWithZpool "jellyseerr" service_configs.zpool_ssds [
+      service_configs.jellyseerr.configDir
+    ])
+    (lib.serviceFilePerms "jellyseerr" [
+      "Z ${service_configs.jellyseerr.configDir} 0700 jellyseerr jellyseerr"
+    ])
+  ];
+
+  services.jellyseerr = {
+    enable = true;
+    port = service_configs.ports.jellyseerr;
+    configDir = service_configs.jellyseerr.configDir;
+  };
+
+  systemd.services.jellyseerr.serviceConfig = {
+    DynamicUser = lib.mkForce false;
+    User = "jellyseerr";
+    Group = "jellyseerr";
+    ReadWritePaths = [ service_configs.jellyseerr.configDir ];
+  };
+
+  users.users.jellyseerr = {
+    isSystemUser = true;
+    group = "jellyseerr";
+    home = service_configs.jellyseerr.configDir;
+  };
+
+  users.groups.jellyseerr = { };
+
+  services.caddy.virtualHosts."jellyseerr.${service_configs.https.domain}".extraConfig = ''
+    # import ${config.age.secrets.caddy_auth.path}
+    reverse_proxy :${builtins.toString service_configs.ports.jellyseerr}
+  '';
+}

services/arr/prowlarr.nix

@@ -0,0 +1,30 @@
+{
+  pkgs,
+  service_configs,
+  config,
+  lib,
+  ...
+}:
+{
+  imports = [
+    (lib.serviceMountWithZpool "prowlarr" service_configs.zpool_ssds [
+      service_configs.prowlarr.dataDir
+    ])
+    (lib.vpnNamespaceOpenPort service_configs.ports.prowlarr "prowlarr")
+  ];
+
+  services.prowlarr = {
+    enable = true;
+    dataDir = service_configs.prowlarr.dataDir;
+    settings.server.port = service_configs.ports.prowlarr;
+  };
+
+  systemd.services.prowlarr.serviceConfig = {
+    ExecStartPre = "+${pkgs.coreutils}/bin/chown -R prowlarr /var/lib/prowlarr";
+  };
+
+  services.caddy.virtualHosts."prowlarr.${service_configs.https.domain}".extraConfig = ''
+    import ${config.age.secrets.caddy_auth.path}
+    reverse_proxy ${config.vpnNamespaces.wg.namespaceAddress}:${builtins.toString service_configs.ports.prowlarr}
+  '';
+}

services/arr/radarr.nix

@@ -0,0 +1,36 @@
+{
+  pkgs,
+  config,
+  service_configs,
+  lib,
+  ...
+}:
+{
+  imports = [
+    (lib.serviceMountWithZpool "radarr" service_configs.zpool_ssds [
+      service_configs.radarr.dataDir
+    ])
+    (lib.serviceMountWithZpool "radarr" service_configs.zpool_hdds [
+      service_configs.torrents_path
+    ])
+    (lib.serviceFilePerms "radarr" [
+      "Z ${service_configs.radarr.dataDir} 0700 ${config.services.radarr.user} ${config.services.radarr.group}"
+    ])
+  ];
+
+  services.radarr = {
+    enable = true;
+    dataDir = service_configs.radarr.dataDir;
+    settings.server.port = service_configs.ports.radarr;
+    settings.update.mechanism = "external";
+  };
+
+  services.caddy.virtualHosts."radarr.${service_configs.https.domain}".extraConfig = ''
+    import ${config.age.secrets.caddy_auth.path}
+    reverse_proxy :${builtins.toString service_configs.ports.radarr}
+  '';
+
+  users.users.${config.services.radarr.user}.extraGroups = [
+    service_configs.media_group
+  ];
+}

services/arr/recyclarr.nix

@@ -0,0 +1,202 @@
+{
+  pkgs,
+  config,
+  service_configs,
+  lib,
+  ...
+}:
+let
+  radarrConfig = "${service_configs.radarr.dataDir}/config.xml";
+  sonarrConfig = "${service_configs.sonarr.dataDir}/config.xml";
+  appDataDir = "${service_configs.recyclarr.dataDir}/data";
+
+  # Runs as root (via + prefix) to read API keys, writes secrets.yml for recyclarr
+  generateSecrets = pkgs.writeShellScript "recyclarr-generate-secrets" ''
+    RADARR_KEY=$(${pkgs.gnugrep}/bin/grep -oP '(?<=<ApiKey>)[^<]+' ${radarrConfig})
+    SONARR_KEY=$(${pkgs.gnugrep}/bin/grep -oP '(?<=<ApiKey>)[^<]+' ${sonarrConfig})
+    cat > ${appDataDir}/secrets.yml <<EOF
+    movies_api_key: $RADARR_KEY
+    series_api_key: $SONARR_KEY
+    EOF
+    chown recyclarr:recyclarr ${appDataDir}/secrets.yml
+    chmod 600 ${appDataDir}/secrets.yml
+  '';
+in
+{
+  imports = [
+    (lib.serviceMountWithZpool "recyclarr" service_configs.zpool_ssds [
+      service_configs.recyclarr.dataDir
+    ])
+  ];
+
+  systemd.tmpfiles.rules = [
+    "d ${service_configs.recyclarr.dataDir} 0755 recyclarr recyclarr -"
+    "d ${appDataDir} 0755 recyclarr recyclarr -"
+  ];
+
+  services.recyclarr = {
+    enable = true;
+    command = "sync";
+    schedule = "daily";
+    user = "recyclarr";
+    group = "recyclarr";
+
+    configuration = {
+      radarr.movies = {
+        base_url = "http://localhost:${builtins.toString service_configs.ports.radarr}";
+
+        include = [
+          { template = "radarr-quality-definition-movie"; }
+          { template = "radarr-quality-profile-remux-web-2160p"; }
+          { template = "radarr-custom-formats-remux-web-2160p"; }
+        ];
+
+        quality_profiles = [
+          {
+            name = "Remux + WEB 2160p";
+            upgrade = {
+              allowed = true;
+              until_quality = "Remux-2160p";
+            };
+            qualities = [
+              { name = "Remux-2160p"; }
+              {
+                name = "WEB 2160p";
+                qualities = [
+                  "WEBDL-2160p"
+                  "WEBRip-2160p"
+                ];
+              }
+              { name = "Remux-1080p"; }
+              { name = "Bluray-1080p"; }
+              {
+                name = "WEB 1080p";
+                qualities = [
+                  "WEBDL-1080p"
+                  "WEBRip-1080p"
+                ];
+              }
+              { name = "HDTV-1080p"; }
+            ];
+          }
+        ];
+
+        custom_formats = [
+          # Upscaled
+          {
+            trash_ids = [ "bfd8eb01832d646a0a89c4deb46f8564" ];
+            assign_scores_to = [
+              {
+                name = "Remux + WEB 2160p";
+                score = -10000;
+              }
+            ];
+          }
+          # x265 (HD) - override template -10000 penalty
+          {
+            trash_ids = [ "dc98083864ea246d05a42df0d05f81cc" ];
+            assign_scores_to = [
+              {
+                name = "Remux + WEB 2160p";
+                score = 0;
+              }
+            ];
+          }
+          # x265 (no HDR/DV) - override template -10000 penalty
+          {
+            trash_ids = [ "839bea857ed2c0a8e084f3cbdbd65ecb" ];
+            assign_scores_to = [
+              {
+                name = "Remux + WEB 2160p";
+                score = 0;
+              }
+            ];
+          }
+        ];
+      };
+
+      sonarr.series = {
+        base_url = "http://localhost:${builtins.toString service_configs.ports.sonarr}";
+
+        include = [
+          { template = "sonarr-quality-definition-series"; }
+          { template = "sonarr-v4-quality-profile-web-2160p"; }
+          { template = "sonarr-v4-custom-formats-web-2160p"; }
+        ];
+
+        quality_profiles = [
+          {
+            name = "WEB-2160p";
+            upgrade = {
+              allowed = true;
+              until_quality = "WEB 2160p";
+            };
+            qualities = [
+              {
+                name = "WEB 2160p";
+                qualities = [
+                  "WEBDL-2160p"
+                  "WEBRip-2160p"
+                ];
+              }
+              { name = "Bluray-1080p Remux"; }
+              { name = "Bluray-1080p"; }
+              {
+                name = "WEB 1080p";
+                qualities = [
+                  "WEBDL-1080p"
+                  "WEBRip-1080p"
+                ];
+              }
+              { name = "HDTV-1080p"; }
+            ];
+          }
+        ];
+
+        custom_formats = [
+          # Upscaled
+          {
+            trash_ids = [ "23297a736ca77c0fc8e70f8edd7ee56c" ];
+            assign_scores_to = [
+              {
+                name = "WEB-2160p";
+                score = -10000;
+              }
+            ];
+          }
+          # x265 (HD) - override template -10000 penalty
+          {
+            trash_ids = [ "47435ece6b99a0b477caf360e79ba0bb" ];
+            assign_scores_to = [
+              {
+                name = "WEB-2160p";
+                score = 0;
+              }
+            ];
+          }
+          # x265 (no HDR/DV) - override template -10000 penalty
+          {
+            trash_ids = [ "9b64dff695c2115facf1b6ea59c9bd07" ];
+            assign_scores_to = [
+              {
+                name = "WEB-2160p";
+                score = 0;
+              }
+            ];
+          }
+        ];
+      };
+    };
+  };
+
+  # Add secrets generation before recyclarr runs
+  systemd.services.recyclarr = {
+    after = [
+      "network-online.target"
+      "radarr.service"
+      "sonarr.service"
+    ];
+    wants = [ "network-online.target" ];
+    serviceConfig.ExecStartPre = "+${generateSecrets}";
+  };
+}

services/arr/sonarr.nix

@@ -0,0 +1,42 @@
+{
+  pkgs,
+  config,
+  service_configs,
+  lib,
+  ...
+}:
+{
+  imports = [
+    (lib.serviceMountWithZpool "sonarr" service_configs.zpool_ssds [
+      service_configs.sonarr.dataDir
+    ])
+    (lib.serviceMountWithZpool "sonarr" service_configs.zpool_hdds [
+      service_configs.torrents_path
+    ])
+    (lib.serviceFilePerms "sonarr" [
+      "Z ${service_configs.sonarr.dataDir} 0700 ${config.services.sonarr.user} ${config.services.sonarr.group}"
+    ])
+  ];
+
+  systemd.tmpfiles.rules = [
+    "d /torrents/media 2775 root ${service_configs.media_group} -"
+    "d ${service_configs.media.tvDir} 2775 root ${service_configs.media_group} -"
+    "d ${service_configs.media.moviesDir} 2775 root ${service_configs.media_group} -"
+  ];
+
+  services.sonarr = {
+    enable = true;
+    dataDir = service_configs.sonarr.dataDir;
+    settings.server.port = service_configs.ports.sonarr;
+    settings.update.mechanism = "external";
+  };
+
+  services.caddy.virtualHosts."sonarr.${service_configs.https.domain}".extraConfig = ''
+    import ${config.age.secrets.caddy_auth.path}
+    reverse_proxy :${builtins.toString service_configs.ports.sonarr}
+  '';
+
+  users.users.${config.services.sonarr.user}.extraGroups = [
+    service_configs.media_group
+  ];
+}

services/jellyfin-qbittorrent-monitor.nix

@@ -46,6 +46,12 @@
       JELLYFIN_URL = "http://localhost:${builtins.toString service_configs.ports.jellyfin}";
       QBITTORRENT_URL = "http://${config.vpnNamespaces.wg.namespaceAddress}:${builtins.toString service_configs.ports.torrent}";
       CHECK_INTERVAL = "30";
+      # Bandwidth budget configuration
+      TOTAL_BANDWIDTH_BUDGET = "30000000"; # 30 Mbps in bits per second
+      SERVICE_BUFFER = "5000000"; # 5 Mbps reserved for other services (bps)
+      DEFAULT_STREAM_BITRATE = "10000000"; # 10 Mbps fallback when bitrate unknown (bps)
+      MIN_TORRENT_SPEED = "100"; # KB/s - below this, pause torrents instead
+      STREAM_BITRATE_HEADROOM = "1.1"; # multiplier per stream for bitrate fluctuations
     };
   };
 }

services/jellyfin-qbittorrent-monitor.py

@@ -29,13 +29,25 @@ class JellyfinQBittorrentMonitor:
         jellyfin_api_key=None,
         streaming_start_delay=10,
         streaming_stop_delay=60,
+        total_bandwidth_budget=30000000,
+        service_buffer=5000000,
+        default_stream_bitrate=10000000,
+        min_torrent_speed=100,
+        stream_bitrate_headroom=1.1,
     ):
         self.jellyfin_url = jellyfin_url
         self.qbittorrent_url = qbittorrent_url
         self.check_interval = check_interval
         self.jellyfin_api_key = jellyfin_api_key
+        self.total_bandwidth_budget = total_bandwidth_budget
+        self.service_buffer = service_buffer
+        self.default_stream_bitrate = default_stream_bitrate
+        self.min_torrent_speed = min_torrent_speed
+        self.stream_bitrate_headroom = stream_bitrate_headroom
         self.last_streaming_state = None
-        self.throttle_active = False
+        self.current_state = "unlimited"
+        self.torrents_paused = False
+        self.last_alt_limits = None
         self.running = True
         self.session = requests.Session()  # Use session for cookies
         self.last_active_streams = []
@@ -70,7 +82,7 @@ class JellyfinQBittorrentMonitor:
         self.restore_normal_limits()
         sys.exit(0)
 
-    def check_jellyfin_sessions(self) -> list[str]:
+    def check_jellyfin_sessions(self) -> list[dict]:
         headers = (
             {"X-Emby-Token": self.jellyfin_api_key} if self.jellyfin_api_key else {}
         )
@@ -101,7 +113,22 @@ class JellyfinQBittorrentMonitor:
                 item_type = item.get("Type", "").lower()
                 if item_type in ["movie", "episode", "video"]:
                     user = session.get("UserName", "Unknown")
-                    active_streams.append(f"{user}: {item.get('Name', 'Unknown')}")
+                    stream_name = f"{user}: {item.get('Name', 'Unknown')}"
+                    if session.get("TranscodingInfo") and session[
+                        "TranscodingInfo"
+                    ].get("Bitrate"):
+                        bitrate = session["TranscodingInfo"]["Bitrate"]
+                    elif item.get("Bitrate"):
+                        bitrate = item["Bitrate"]
+                    elif item.get("MediaSources", [{}])[0].get("Bitrate"):
+                        bitrate = item["MediaSources"][0]["Bitrate"]
+                    else:
+                        bitrate = self.default_stream_bitrate
+
+                    bitrate = min(int(bitrate), 100_000_000)
+                    # Add headroom to account for bitrate fluctuations
+                    bitrate = int(bitrate * self.stream_bitrate_headroom)
+                    active_streams.append({"name": stream_name, "bitrate_bps": bitrate})
 
         return active_streams
 
@@ -139,9 +166,6 @@ class JellyfinQBittorrentMonitor:
                 timeout=10,
             )
             response.raise_for_status()
-
-            self.throttle_active = enable
-
             new_state = self.check_qbittorrent_alternate_limits()
             if new_state == enable:
                 logger.info(f"Alternate speed limits {action}")
@@ -157,19 +181,76 @@ class JellyfinQBittorrentMonitor:
         except requests.exceptions.RequestException as e:
             logger.error(f"Failed to {action} alternate speed limits: {e}")
 
+    def pause_all_torrents(self) -> None:
+        try:
+            response = self.session.post(
+                f"{self.qbittorrent_url}/api/v2/torrents/stop",
+                data={"hashes": "all"},
+                timeout=10,
+            )
+            response.raise_for_status()
+        except requests.exceptions.RequestException as e:
+            logger.error(f"Failed to pause torrents: {e}")
+
+    def resume_all_torrents(self) -> None:
+        try:
+            response = self.session.post(
+                f"{self.qbittorrent_url}/api/v2/torrents/start",
+                data={"hashes": "all"},
+                timeout=10,
+            )
+            response.raise_for_status()
+        except requests.exceptions.RequestException as e:
+            logger.error(f"Failed to resume torrents: {e}")
+
+    def set_alt_speed_limits(self, dl_kbs: float, ul_kbs: float) -> None:
+        try:
+            payload = {
+                "alt_dl_limit": int(dl_kbs * 1024),
+                "alt_up_limit": int(ul_kbs * 1024),
+            }
+            response = self.session.post(
+                f"{self.qbittorrent_url}/api/v2/app/setPreferences",
+                data={"json": json.dumps(payload)},
+                timeout=10,
+            )
+            response.raise_for_status()
+            self.last_alt_limits = (dl_kbs, ul_kbs)
+        except requests.exceptions.RequestException as e:
+            logger.error(f"Failed to set alternate speed limits: {e}")
+
     def restore_normal_limits(self) -> None:
-        if self.throttle_active:
+        if self.torrents_paused:
+            logger.info("Resuming all torrents before shutdown...")
+            self.resume_all_torrents()
+            self.torrents_paused = False
+
+        if self.current_state != "unlimited":
             logger.info("Restoring normal speed limits before shutdown...")
         self.use_alt_limits(False)
+        self.current_state = "unlimited"
 
     def sync_qbittorrent_state(self) -> None:
         try:
+            if self.current_state == "unlimited":
                 actual_state = self.check_qbittorrent_alternate_limits()
-            if actual_state != self.throttle_active:
+                if actual_state:
                     logger.warning(
-                    f"qBittorrent state mismatch detected: expected {self.throttle_active}, got {actual_state}. Re-syncing..."
+                        "qBittorrent state mismatch detected: expected alt speed OFF, got ON. Re-syncing..."
                     )
-                self.use_alt_limits(self.throttle_active)
+                    self.use_alt_limits(False)
+            elif self.current_state == "throttled":
+                if self.last_alt_limits:
+                    self.set_alt_speed_limits(*self.last_alt_limits)
+                actual_state = self.check_qbittorrent_alternate_limits()
+                if not actual_state:
+                    logger.warning(
+                        "qBittorrent state mismatch detected: expected alt speed ON, got OFF. Re-syncing..."
+                    )
+                    self.use_alt_limits(True)
+            elif self.current_state == "paused":
+                self.pause_all_torrents()
+                self.torrents_paused = True
         except ServiceUnavailable:
             pass
 
@@ -182,7 +263,6 @@ class JellyfinQBittorrentMonitor:
 
         time_since_change = now - self.last_state_change
 
-        # Start throttling (streaming started)
         if new_streaming_state and not self.last_streaming_state:
             if time_since_change >= self.streaming_start_delay:
                 self.last_state_change = now
@@ -190,10 +270,9 @@ class JellyfinQBittorrentMonitor:
             else:
                 remaining = self.streaming_start_delay - time_since_change
                 logger.info(
-                    f"Streaming started - waiting {remaining:.1f}s before enabling throttling"
+                    f"Streaming started - waiting {remaining:.1f}s before enforcing limits"
                 )
 
-        # Stop throttling (streaming stopped)
         elif not new_streaming_state and self.last_streaming_state:
             if time_since_change >= self.streaming_stop_delay:
                 self.last_state_change = now
@@ -201,7 +280,7 @@ class JellyfinQBittorrentMonitor:
             else:
                 remaining = self.streaming_stop_delay - time_since_change
                 logger.info(
-                    f"Streaming stopped - waiting {remaining:.1f}s before disabling throttling"
+                    f"Streaming stopped - waiting {remaining:.1f}s before restoring unlimited mode"
                 )
 
         return False
@@ -211,6 +290,13 @@ class JellyfinQBittorrentMonitor:
         logger.info(f"Jellyfin URL: {self.jellyfin_url}")
         logger.info(f"qBittorrent URL: {self.qbittorrent_url}")
         logger.info(f"Check interval: {self.check_interval}s")
+        logger.info(f"Streaming start delay: {self.streaming_start_delay}s")
+        logger.info(f"Streaming stop delay: {self.streaming_stop_delay}s")
+        logger.info(f"Total bandwidth budget: {self.total_bandwidth_budget} bps")
+        logger.info(f"Service buffer: {self.service_buffer} bps")
+        logger.info(f"Default stream bitrate: {self.default_stream_bitrate} bps")
+        logger.info(f"Minimum torrent speed: {self.min_torrent_speed} KB/s")
+        logger.info(f"Stream bitrate headroom: {self.stream_bitrate_headroom}x")
 
         signal.signal(signal.SIGINT, self.signal_handler)
         signal.signal(signal.SIGTERM, self.signal_handler)
@@ -222,26 +308,91 @@ class JellyfinQBittorrentMonitor:
                 try:
                     active_streams = self.check_jellyfin_sessions()
                 except ServiceUnavailable:
-                    logger.warning(
+                    logger.warning("Jellyfin unavailable, maintaining current state")
-                        "Jellyfin unavailable, maintaining current throttle state"
-                    )
                     time.sleep(self.check_interval)
                     continue
 
                 streaming_active = len(active_streams) > 0
 
+                if active_streams:
+                    for stream in active_streams:
+                        logger.debug(
+                            f"Active stream: {stream['name']} ({stream['bitrate_bps']} bps)"
+                        )
+
                 if active_streams != self.last_active_streams:
                     if streaming_active:
+                        stream_names = ", ".join(
+                            stream["name"] for stream in active_streams
+                        )
                         logger.info(
-                            f"Active streams ({len(active_streams)}): {', '.join(active_streams)}"
+                            f"Active streams ({len(active_streams)}): {stream_names}"
                         )
                     elif len(active_streams) == 0 and self.last_streaming_state:
                         logger.info("No active streaming sessions")
 
                 if self.should_change_state(streaming_active):
                     self.last_streaming_state = streaming_active
-                    self.use_alt_limits(streaming_active)
 
+                streaming_state = bool(self.last_streaming_state)
+                total_streaming_bps = sum(
+                    stream["bitrate_bps"] for stream in active_streams
+                )
+                remaining_bps = (
+                    self.total_bandwidth_budget
+                    - self.service_buffer
+                    - total_streaming_bps
+                )
+                remaining_kbs = max(0, remaining_bps) / 8 / 1024
+
+                if not streaming_state:
+                    desired_state = "unlimited"
+                elif streaming_active:
+                    if remaining_kbs >= self.min_torrent_speed:
+                        desired_state = "throttled"
+                    else:
+                        desired_state = "paused"
+                else:
+                    desired_state = self.current_state
+
+                if desired_state != self.current_state:
+                    if desired_state == "unlimited":
+                        action = "resume torrents, disable alt speed"
+                    elif desired_state == "throttled":
+                        action = (
+                            "set alt limits "
+                            f"dl={int(remaining_kbs)}KB/s ul={int(remaining_kbs)}KB/s, enable alt speed"
+                        )
+                    else:
+                        action = "pause torrents"
+
+                    logger.info(
+                        "State change %s -> %s | streams=%d total_bps=%d remaining_bps=%d action=%s",
+                        self.current_state,
+                        desired_state,
+                        len(active_streams),
+                        total_streaming_bps,
+                        remaining_bps,
+                        action,
+                    )
+
+                if desired_state == "unlimited":
+                    if self.torrents_paused:
+                        self.resume_all_torrents()
+                        self.torrents_paused = False
+                    self.use_alt_limits(False)
+                elif desired_state == "throttled":
+                    if self.torrents_paused:
+                        self.resume_all_torrents()
+                        self.torrents_paused = False
+                    self.set_alt_speed_limits(remaining_kbs, remaining_kbs)
+                    self.use_alt_limits(True)
+                else:
+                    if not self.torrents_paused:
+                        self.pause_all_torrents()
+                        self.torrents_paused = True
+
+                self.current_state = desired_state
                 self.last_active_streams = active_streams
                 time.sleep(self.check_interval)
 
@@ -265,6 +416,11 @@ if __name__ == "__main__":
     jellyfin_api_key = os.getenv("JELLYFIN_API_KEY")
     streaming_start_delay = int(os.getenv("STREAMING_START_DELAY", "10"))
     streaming_stop_delay = int(os.getenv("STREAMING_STOP_DELAY", "60"))
+    total_bandwidth_budget = int(os.getenv("TOTAL_BANDWIDTH_BUDGET", "30000000"))
+    service_buffer = int(os.getenv("SERVICE_BUFFER", "5000000"))
+    default_stream_bitrate = int(os.getenv("DEFAULT_STREAM_BITRATE", "10000000"))
+    min_torrent_speed = int(os.getenv("MIN_TORRENT_SPEED", "100"))
+    stream_bitrate_headroom = float(os.getenv("STREAM_BITRATE_HEADROOM", "1.1"))
 
     monitor = JellyfinQBittorrentMonitor(
         jellyfin_url=jellyfin_url,
@@ -273,6 +429,11 @@ if __name__ == "__main__":
         jellyfin_api_key=jellyfin_api_key,
         streaming_start_delay=streaming_start_delay,
         streaming_stop_delay=streaming_stop_delay,
+        total_bandwidth_budget=total_bandwidth_budget,
+        service_buffer=service_buffer,
+        default_stream_bitrate=default_stream_bitrate,
+        min_torrent_speed=min_torrent_speed,
+        stream_bitrate_headroom=stream_bitrate_headroom,
     )
 
     monitor.run()

services/matrix.nix

@@ -1,9 +1,34 @@
 {
   config,
+  pkgs,
   service_configs,
   lib,
   ...
 }:
+let
+  package =
+    let
+      src = pkgs.fetchFromGitea {
+        domain = "forgejo.ellis.link";
+        owner = "continuwuation";
+        repo = "continuwuity";
+        rev = "052c4dfa2165fdc4839fed95b71446120273cf23";
+        hash = "sha256-kQV4glRrKczoJpn9QIMgB5ac+saZQjSZPel+9K9Ykcs=";
+      };
+    in
+    pkgs.matrix-continuwuity.overrideAttrs (old: {
+      inherit src;
+      cargoDeps = pkgs.rustPlatform.fetchCargoVendor {
+        inherit src;
+        name = "${old.pname}-vendor";
+        hash = "sha256-vlOXQL8wwEGFX+w0G/eIeHW3J1UDzhJ501kYhAghDV8=";
+      };
+
+      patches = (old.patches or [ ]) ++ [
+
+      ];
+    });
+in
 {
   imports = [
     (lib.serviceMountWithZpool "continuwuity" service_configs.zpool_ssds [
@@ -16,6 +41,7 @@
 
   services.matrix-continuwuity = {
     enable = true;
+    inherit package;
 
     settings.global = {
       port = [ service_configs.ports.matrix ];

services/minecraft.nix

@@ -35,7 +35,38 @@
         let
           heap_size = "4000M";
         in
-        "-Xmx${heap_size} -Xms${heap_size} -XX:+UseZGC -XX:+ZGenerational";
+        lib.concatStringsSep " " [
+          # Memory
+          "-Xmx${heap_size}"
+          "-Xms${heap_size}"
+          # GC
+          "-XX:+UseZGC"
+          "-XX:+ZGenerational"
+          # Base JVM optimizations (brucethemoose/Minecraft-Performance-Flags-Benchmarks)
+          "-XX:+UnlockExperimentalVMOptions"
+          "-XX:+UnlockDiagnosticVMOptions"
+          "-XX:+AlwaysActAsServerClassMachine"
+          "-XX:+AlwaysPreTouch"
+          "-XX:+DisableExplicitGC"
+          "-XX:+UseNUMA"
+          "-XX:+PerfDisableSharedMem"
+          "-XX:+UseFastUnorderedTimeStamps"
+          "-XX:+UseCriticalJavaThreadPriority"
+          "-XX:ThreadPriorityPolicy=1"
+          "-XX:AllocatePrefetchStyle=3"
+          "-XX:-DontCompileHugeMethods"
+          "-XX:MaxNodeLimit=240000"
+          "-XX:NodeLimitFudgeFactor=8000"
+          "-XX:ReservedCodeCacheSize=400M"
+          "-XX:NonNMethodCodeHeapSize=12M"
+          "-XX:ProfiledCodeHeapSize=194M"
+          "-XX:NonProfiledCodeHeapSize=194M"
+          "-XX:NmethodSweepActivity=1"
+          "-XX:+UseVectorCmov"
+          # Large pages (requires vm.nr_hugepages sysctl)
+          "-XX:+UseLargePages"
+          "-XX:LargePageSizeInBytes=2m"
+        ];
 
       serverProperties = {
         server-port = service_configs.ports.minecraft;
@@ -57,23 +88,23 @@
           with pkgs;
           builtins.attrValues {
             FabricApi = fetchurl {
-              url = "https://cdn.modrinth.com/data/P7dR8mSH/versions/KhCFoeip/fabric-api-0.139.5%2B1.21.11.jar";
+              url = "https://cdn.modrinth.com/data/P7dR8mSH/versions/i5tSkVBH/fabric-api-0.141.3%2B1.21.11.jar";
-              sha512 = "852c9e76175b2d51cea191bfcc0005b824de433f1a6de01d672b9e82ca1cab8478b180670bc6c4811744ef4abec8bd2ff3ab0f9c1aa5644713d06f3fbcc278f0";
+              sha512 = "c20c017e23d6d2774690d0dd774cec84c16bfac5461da2d9345a1cd95eee495b1954333c421e3d1c66186284d24a433f6b0cced8021f62e0bfa617d2384d0471";
             };
 
             FerriteCore = fetchurl {
-              url = "https://cdn.modrinth.com/data/uXXizFIs/versions/eRLwt73x/ferritecore-8.0.3-fabric.jar";
+              url = "https://cdn.modrinth.com/data/uXXizFIs/versions/Ii0gP3D8/ferritecore-8.2.0-fabric.jar";
-              sha512 = "be600543e499b59286f9409f46497570adc51939ae63eaa12ac29e6778da27d8c7c6cd0b3340d8bcca1cc99ce61779b1a8f52b990f9e4e9a93aa9c6482905231";
+              sha512 = "3210926a82eb32efd9bcebabe2f6c053daf5c4337eebc6d5bacba96d283510afbde646e7e195751de795ec70a2ea44fef77cb54bf22c8e57bb832d6217418869";
             };
 
             Lithium = fetchurl {
-              url = "https://cdn.modrinth.com/data/gvQqBUqZ/versions/4DdLmtyz/lithium-fabric-0.21.1%2Bmc1.21.11.jar";
+              url = "https://cdn.modrinth.com/data/gvQqBUqZ/versions/qvNsoO3l/lithium-fabric-0.21.3%2Bmc1.21.11.jar";
-              sha512 = "0857d30d063dc704a264b2fe774a7e641926193cfdcde72fe2cd603043d8548045b955e30c05b1b2b96ef7d1c0f85d55269da26f44a0644c984b45623e976794";
+              sha512 = "2883739303f0bb602d3797cc601ed86ce6833e5ec313ddce675f3d6af3ee6a40b9b0a06dafe39d308d919669325e95c0aafd08d78c97acd976efde899c7810fd";
             };
 
             NoChatReports = fetchurl {
-              url = "https://cdn.modrinth.com/data/qQyHxfxd/versions/78RjC1gi/NoChatReports-FABRIC-1.21.10-v2.16.0.jar";
+              url = "https://cdn.modrinth.com/data/qQyHxfxd/versions/rhykGstm/NoChatReports-FABRIC-1.21.11-v2.18.0.jar";
-              sha512 = "39b2f284f73f8290012b8b9cc70085d59668547fc7b4ec43ab34e4bca6b39a6691fbe32bc3326e40353ba9c16a06320e52818315be77799a5aad526370cbc773";
+              sha512 = "d2c35cc8d624616f441665aff67c0e366e4101dba243bad25ed3518170942c1a3c1a477b28805cd1a36c44513693b1c55e76bea627d3fced13927a3d67022ccc";
             };
 
             squaremap = fetchurl {
@@ -87,8 +118,8 @@
             };
 
             c2me = fetchurl {
-              url = "https://cdn.modrinth.com/data/VSNURh3q/versions/DLKF3HZk/c2me-fabric-mc1.21.11-0.3.6%2Bbeta.1.0.jar";
+              url = "https://cdn.modrinth.com/data/VSNURh3q/versions/QdLiMUjx/c2me-fabric-mc1.21.11-0.3.7%2Balpha.0.7.jar";
-              sha512 = "d4f983aeb5083033b525522e623a9a9ba86b6fc9c83db008cc0575d0077e736ac9bee0b6b0e03b8d1c89ae27a4e5cdc269041f61eb0d1a10757de4c30b065467";
+              sha512 = "f9543febe2d649a82acd6d5b66189b6a3d820cf24aa503ba493fdb3bbd4e52e30912c4c763fe50006f9a46947ae8cd737d420838c61b93429542573ed67f958e";
             };
 
             krypton = fetchurl {
@@ -96,31 +127,46 @@
               sha512 = "4dcd7228d1890ddfc78c99ff284b45f9cf40aae77ef6359308e26d06fa0d938365255696af4cc12d524c46c4886cdcd19268c165a2bf0a2835202fe857da5cab";
             };
 
-            /*
             better-fabric-console = fetchurl {
-                url = "https://cdn.modrinth.com/data/Y8o1j1Sf/versions/fZprQjU4/better-fabric-console-mc1.21.10-1.2.7.jar";
+              url = "https://cdn.modrinth.com/data/Y8o1j1Sf/versions/6aIKl5wy/better-fabric-console-mc1.21.11-1.2.9.jar";
-                sha512 = "0321e4a687ba5ed4dcb081aa48909d45c4e153f8b6217cd807f280f33250151b97ac80a122a83d48535c788d3c1e08a7ee882da3b20cf06021e03c1ddc943278";
+              sha512 = "427247dafd99df202ee10b4bf60ffcbbecbabfadb01c167097ffb5b85670edb811f4d061c2551be816295cbbc6b8ec5ec464c14a6ff41912ef1f6c57b038d320";
             };
-            */
 
             disconnect-packet-fix = fetchurl {
               url = "https://cdn.modrinth.com/data/rd9rKuJT/versions/Gv74xveQ/disconnect-packet-fix-fabric-2.0.0.jar";
               sha512 = "1fd6f09a41ce36284e1a8e9def53f3f6834d7201e69e54e24933be56445ba569fbc26278f28300d36926ba92db6f4f9c0ae245d23576aaa790530345587316db";
             };
 
-            # Mixin apply for mod packetfixer failed
-            /*
             packet-fixer = fetchurl {
-                url = "https://cdn.modrinth.com/data/c7m1mi73/versions/LFMYVIc7/packetfixer-fabric-3.3.2-1.21.11.jar";
+              url = "https://cdn.modrinth.com/data/c7m1mi73/versions/CUh1DWeO/packetfixer-fabric-3.3.4-1.21.11.jar";
-                sha512 = "a7cdc4b81653ca7c823c91ffd29092365feff78b8d8e019f35ab6c47a0f18661768656cc5fe73f802ab7097d828d8173cc23d32b454a7acd64ff6b7118789413";
+              sha512 = "33331b16cb40c5e6fbaade3cacc26f3a0e8fa5805a7186f94d7366a0e14dbeee9de2d2e8c76fa71f5e9dd24eb1c261667c35447e32570ea965ca0f154fdfba0a";
             };
-            */
+
+            # fork of Modernfix for 1.21.11 (upstream will support 26.1)
+            modernfix = fetchurl {
+              url = "https://cdn.modrinth.com/data/TjSm1wrD/versions/JwSO8JCN/modernfix-5.25.2-build.4.jar";
+              sha512 = "0d65c05ac0475408c58ef54215714e6301113101bf98bfe4bb2ba949fbfddd98225ac4e2093a5f9206a9e01ba80a931424b237bdfa3b6e178c741ca6f7f8c6a3";
+            };
+
+            debugify = fetchurl {
+              url = "https://cdn.modrinth.com/data/QwxR6Gcd/versions/8Q49lnaU/debugify-1.21.11%2B1.0.jar";
+              sha512 = "04d82dd33f44ced37045f1f9a54ad4eacd70861ff74a8800f2d2df358579e6cb0ea86a34b0086b3e87026b1a0691dd6594b4fdc49f89106466eea840518beb03";
+            };
+
           }
         );
       };
     };
   };
 
+  systemd.services.minecraft-server-main = {
+    serviceConfig = {
+      Nice = -5;
+      IOSchedulingPriority = 0;
+      LimitMEMLOCK = "infinity"; # Required for large pages
+    };
+  };
+
   services.caddy.virtualHosts = lib.mkIf (config.services.caddy.enable) {
     "map.${service_configs.https.domain}".extraConfig = ''
       root * ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}/squaremap/web

services/monero.nix

@@ -20,5 +20,4 @@
       restricted = true;
     };
   };
-
 }

services/ntfy-alerts.nix

@@ -0,0 +1,10 @@
+{ config, service_configs, ... }:
+{
+  services.ntfyAlerts = {
+    enable = true;
+    serverUrl = "https://${service_configs.ntfy.domain}";
+    topicFile = config.age.secrets.ntfy-alerts-topic.path;
+
+    tokenFile = config.age.secrets.ntfy-alerts-token.path;
+  };
+}

services/qbittorrent.nix

@@ -18,7 +18,9 @@
     ])
     (lib.vpnNamespaceOpenPort config.services.qbittorrent.webuiPort "qbittorrent")
     (lib.serviceFilePerms "qbittorrent" [
-      "Z ${config.services.qbittorrent.serverConfig.Preferences.Downloads.SavePath} 0750 ${config.services.qbittorrent.user} ${service_configs.media_group}"
+      # 0770: group (media) needs write to delete files during upgrades —
+      # Radarr/Sonarr must unlink the old file before placing the new one.
+      "Z ${config.services.qbittorrent.serverConfig.Preferences.Downloads.SavePath} 0770 ${config.services.qbittorrent.user} ${service_configs.media_group}"
       "Z ${config.services.qbittorrent.serverConfig.Preferences.Downloads.TempPath} 0700 ${config.services.qbittorrent.user} ${config.services.qbittorrent.group}"
       "Z ${config.services.qbittorrent.profileDir} 0700 ${config.services.qbittorrent.user} ${config.services.qbittorrent.group}"
     ])
@@ -28,6 +30,11 @@
     enable = true;
     webuiPort = service_configs.ports.torrent;
     profileDir = "/var/lib/qBittorrent";
+    # Set the service group to 'media' so the systemd unit runs with media as
+    # the primary GID. Linux assigns new file ownership from the process's GID
+    # (set by systemd's Group= directive), not from /etc/passwd. Without this,
+    # downloads land as qbittorrent:qbittorrent (0700), blocking Radarr/Sonarr.
+    group = service_configs.media_group;
 
     serverConfig.LegalNotice.Accepted = true;
 
@@ -48,7 +55,7 @@
 
     serverConfig.BitTorrent = {
       Session = {
-        MaxConnectionsPerTorrent = 10;
+        MaxConnectionsPerTorrent = 50;
         MaxUploadsPerTorrent = 10;
         MaxConnections = -1;
         MaxUploads = -1;
@@ -56,9 +63,10 @@
         MaxActiveCheckingTorrents = 5;
 
         # queueing
-        QueueingSystemEnabled = false;
+        QueueingSystemEnabled = true;
-        MaxActiveDownloads = 2; # num of torrents that can download at the same time
+        MaxActiveDownloads = 5; # keep focused: fewer torrents, each gets more bandwidth
-        MaxActiveUploads = 20;
+        MaxActiveUploads = -1;
+        MaxActiveTorrents = -1;
         IgnoreSlowTorrentsForQueueing = true;
 
         GlobalUPSpeedLimit = 0;
@@ -69,7 +77,7 @@
         AlternativeGlobalDLSpeedLimit = 800; # 800 KB/s when throttled
         IncludeOverheadInLimits = true;
 
-        GlobalMaxRatio = 6.0;
+        GlobalMaxRatio = 7.0;
 
         AddTrackersEnabled = true;
         AdditionalTrackers = lib.concatStringsSep "\\n" (
@@ -83,12 +91,17 @@
         inherit (config.services.qbittorrent.serverConfig.Preferences.Downloads) TempPath;
         TempPathEnabled = true;
 
-        # how many connections per sec
+        ConnectionSpeed = 200;
-        ConnectionSpeed = 300;
+
+        # Automatic Torrent Management: use category save paths for new torrents
+        DisableAutoTMMByDefault = false;
+        DisableAutoTMMTriggers.CategorySavePathChanged = false;
+        DisableAutoTMMTriggers.DefaultSavePathChanged = false;
 
         ChokingAlgorithm = "RateBased";
         PieceExtentAffinity = true;
         SuggestMode = true;
+        CoalesceReadWrite = true;
       };
 
       Network = {

tests/fail2ban-gitea.nix

@@ -25,10 +25,7 @@ let
         serviceName: zpool: dirs:
         { ... }:
         { };
-      serviceFilePerms =
+      serviceFilePerms = serviceName: tmpfilesRules: { ... }: { };
-        serviceName: tmpfilesRules:
-        { ... }:
-        { };
     }
   );
 

tests/fail2ban-immich.nix

@@ -24,10 +24,7 @@ let
         serviceName: zpool: dirs:
         { ... }:
         { };
-      serviceFilePerms =
+      serviceFilePerms = serviceName: tmpfilesRules: { ... }: { };
-        serviceName: tmpfilesRules:
-        { ... }:
-        { };
     }
   );
 

tests/fail2ban-jellyfin.nix

@@ -26,10 +26,7 @@ let
         serviceName: zpool: dirs:
         { ... }:
         { };
-      serviceFilePerms =
+      serviceFilePerms = serviceName: tmpfilesRules: { ... }: { };
-        serviceName: tmpfilesRules:
-        { ... }:
-        { };
       optimizePackage = pkg: pkg; # No-op for testing
     }
   );

tests/fail2ban-vaultwarden.nix

@@ -24,10 +24,7 @@ let
         serviceName: zpool: dirs:
         { ... }:
         { };
-      serviceFilePerms =
+      serviceFilePerms = serviceName: tmpfilesRules: { ... }: { };
-        serviceName: tmpfilesRules:
-        { ... }:
-        { };
     }
   );
 

tests/jellyfin-qbittorrent-monitor.nix

@@ -123,6 +123,20 @@ pkgs.testers.runNixOSTest {
     def is_throttled():
         return server.succeed("curl -s http://localhost:8080/api/v2/transfer/speedLimitsMode").strip() == "1"
 
+    def get_alt_dl_limit():
+        prefs = json.loads(server.succeed("curl -s http://localhost:8080/api/v2/app/preferences"))
+        return prefs["alt_dl_limit"]
+
+    def get_alt_up_limit():
+        prefs = json.loads(server.succeed("curl -s http://localhost:8080/api/v2/app/preferences"))
+        return prefs["alt_up_limit"]
+
+    def are_torrents_paused():
+        torrents = json.loads(server.succeed("curl -s 'http://localhost:8080/api/v2/torrents/info'"))
+        if not torrents:
+            return False
+        return all(t["state"].startswith("stopped") for t in torrents)
+
     movie_id: str = ""
     media_source_id: str = ""
 
@@ -186,12 +200,17 @@ pkgs.testers.runNixOSTest {
             --setenv=CHECK_INTERVAL=1 \
             --setenv=STREAMING_START_DELAY=1 \
             --setenv=STREAMING_STOP_DELAY=1 \
+            --setenv=TOTAL_BANDWIDTH_BUDGET=50000000 \
+            --setenv=SERVICE_BUFFER=2000000 \
+            --setenv=DEFAULT_STREAM_BITRATE=10000000 \
+            --setenv=MIN_TORRENT_SPEED=100 \
             {python} {monitor}
         """)
         time.sleep(2)
         assert not is_throttled(), "Should start unthrottled"
 
     client_auth = 'MediaBrowser Client="External Client", DeviceId="external-9999", Device="ExternalDevice", Version="1.0"'
+    client_auth2 = 'MediaBrowser Client="External Client 2", DeviceId="external-8888", Device="ExternalDevice2", Version="1.0"'
     server_ip = "192.168.1.1"
 
     with subtest("Client authenticates from external network"):
@@ -199,6 +218,11 @@ pkgs.testers.runNixOSTest {
         client_auth_result = json.loads(client.succeed(auth_cmd))
         client_token = client_auth_result["AccessToken"]
 
+    with subtest("Second client authenticates from external network"):
+        auth_cmd2 = f"curl -sf -X POST 'http://{server_ip}:8096/Users/AuthenticateByName' -d '@${payloads.auth}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth2}'"
+        client_auth_result2 = json.loads(client.succeed(auth_cmd2))
+        client_token2 = client_auth_result2["AccessToken"]
+
     with subtest("External video playback triggers throttling"):
         playback_start = {
             "ItemId": movie_id,
@@ -248,6 +272,161 @@ pkgs.testers.runNixOSTest {
 
         assert not is_throttled(), "Should unthrottle when playback stops"
 
+    with subtest("Single stream sets proportional alt speed limits"):
+        playback_start = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-proportional",
+            "CanSeek": True,
+            "IsPaused": False,
+        }
+        start_cmd = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing' -d '{json.dumps(playback_start)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}, Token={client_token}'"
+        client.succeed(start_cmd)
+        time.sleep(3)
+
+        assert is_throttled(), "Should be in alt speed mode during streaming"
+        dl_limit = get_alt_dl_limit()
+        ul_limit = get_alt_up_limit()
+        # Both upload and download should get remaining bandwidth (proportional)
+        assert dl_limit > 0, f"Download limit should be > 0, got {dl_limit}"
+        assert ul_limit == dl_limit, f"Upload limit ({ul_limit}) should equal download limit ({dl_limit})"
+
+        # Stop playback
+        playback_stop = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-proportional",
+            "PositionTicks": 50000000,
+        }
+        stop_cmd = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing/Stopped' -d '{json.dumps(playback_stop)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}, Token={client_token}'"
+        client.succeed(stop_cmd)
+        time.sleep(3)
+
+    with subtest("Multiple streams reduce available bandwidth"):
+        # Start first stream
+        playback1 = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-multi-1",
+            "CanSeek": True,
+            "IsPaused": False,
+        }
+        start_cmd1 = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing' -d '{json.dumps(playback1)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}, Token={client_token}'"
+        client.succeed(start_cmd1)
+        time.sleep(3)
+
+        single_dl_limit = get_alt_dl_limit()
+
+        # Start second stream with different client identity
+        playback2 = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-multi-2",
+            "CanSeek": True,
+            "IsPaused": False,
+        }
+        start_cmd2 = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing' -d '{json.dumps(playback2)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth2}, Token={client_token2}'"
+        client.succeed(start_cmd2)
+        time.sleep(3)
+
+        dual_dl_limit = get_alt_dl_limit()
+        # Two streams should leave less bandwidth than one stream
+        assert dual_dl_limit < single_dl_limit, f"Two streams ({dual_dl_limit}) should have lower limit than one ({single_dl_limit})"
+
+        # Stop both streams
+        stop1 = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-multi-1",
+            "PositionTicks": 50000000,
+        }
+        stop_cmd1 = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing/Stopped' -d '{json.dumps(stop1)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}, Token={client_token}'"
+        client.succeed(stop_cmd1)
+
+        stop2 = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-multi-2",
+            "PositionTicks": 50000000,
+        }
+        stop_cmd2 = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing/Stopped' -d '{json.dumps(stop2)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth2}, Token={client_token2}'"
+        client.succeed(stop_cmd2)
+        time.sleep(3)
+
+    with subtest("Budget exhaustion pauses all torrents"):
+        # Stop current monitor
+        server.succeed("systemctl stop monitor-test || true")
+        time.sleep(1)
+
+        # Add a dummy torrent so we can check pause state
+        server.succeed("curl -sf -X POST 'http://localhost:8080/api/v2/torrents/add' -d 'urls=magnet:?xt=urn:btih:0000000000000000000000000000000000000001%26dn=test-torrent'")
+        time.sleep(2)
+
+        # Start monitor with impossibly low budget
+        server.succeed(f"""
+          systemd-run --unit=monitor-exhaust \
+            --setenv=JELLYFIN_URL=http://localhost:8096 \
+            --setenv=JELLYFIN_API_KEY={token} \
+            --setenv=QBITTORRENT_URL=http://localhost:8080 \
+            --setenv=CHECK_INTERVAL=1 \
+            --setenv=STREAMING_START_DELAY=1 \
+            --setenv=STREAMING_STOP_DELAY=1 \
+            --setenv=TOTAL_BANDWIDTH_BUDGET=1000 \
+            --setenv=SERVICE_BUFFER=500 \
+            --setenv=DEFAULT_STREAM_BITRATE=10000000 \
+            --setenv=MIN_TORRENT_SPEED=100 \
+            {python} {monitor}
+        """)
+        time.sleep(2)
+
+        # Start a stream - this will exceed the tiny budget
+        playback_start = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-exhaust",
+            "CanSeek": True,
+            "IsPaused": False,
+        }
+        start_cmd = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing' -d '{json.dumps(playback_start)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}, Token={client_token}'"
+        client.succeed(start_cmd)
+        time.sleep(3)
+
+        assert are_torrents_paused(), "Torrents should be paused when budget is exhausted"
+
+    with subtest("Recovery from pause restores unlimited"):
+        # Stop the stream
+        playback_stop = {
+            "ItemId": movie_id,
+            "MediaSourceId": media_source_id,
+            "PlaySessionId": "test-play-session-exhaust",
+            "PositionTicks": 50000000,
+        }
+        stop_cmd = f"curl -sf -X POST 'http://{server_ip}:8096/Sessions/Playing/Stopped' -d '{json.dumps(playback_stop)}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}, Token={client_token}'"
+        client.succeed(stop_cmd)
+        time.sleep(3)
+
+        assert not is_throttled(), "Should return to unlimited after streams stop"
+        assert not are_torrents_paused(), "Torrents should be resumed after streams stop"
+
+        # Clean up: stop exhaust monitor, restart normal monitor
+        server.succeed("systemctl stop monitor-exhaust || true")
+        time.sleep(1)
+        server.succeed(f"""
+          systemd-run --unit=monitor-test \
+            --setenv=JELLYFIN_URL=http://localhost:8096 \
+            --setenv=JELLYFIN_API_KEY={token} \
+            --setenv=QBITTORRENT_URL=http://localhost:8080 \
+            --setenv=CHECK_INTERVAL=1 \
+            --setenv=STREAMING_START_DELAY=1 \
+            --setenv=STREAMING_STOP_DELAY=1 \
+            --setenv=TOTAL_BANDWIDTH_BUDGET=50000000 \
+            --setenv=SERVICE_BUFFER=2000000 \
+            --setenv=DEFAULT_STREAM_BITRATE=10000000 \
+            --setenv=MIN_TORRENT_SPEED=100 \
+            {python} {monitor}
+        """)
+        time.sleep(2)
+
     with subtest("Local playback does NOT trigger throttling"):
         local_auth = 'MediaBrowser Client="Local Client", DeviceId="local-1111", Device="LocalDevice", Version="1.0"'
         local_auth_result = json.loads(server.succeed(
@@ -351,6 +530,10 @@ pkgs.testers.runNixOSTest {
             f"curl -sf -X POST 'http://{server_ip}:8096/Users/AuthenticateByName' -d '@${payloads.auth}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}'"
         ))
         client_token = client_auth_result["AccessToken"]
+        client_auth_result2 = json.loads(client.succeed(
+            f"curl -sf -X POST 'http://{server_ip}:8096/Users/AuthenticateByName' -d '@${payloads.auth}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth2}'"
+        ))
+        client_token2 = client_auth_result2["AccessToken"]
 
         # No active streams after Jellyfin restart, should eventually unthrottle
         time.sleep(3)
@@ -362,6 +545,10 @@ pkgs.testers.runNixOSTest {
             f"curl -sf -X POST 'http://{server_ip}:8096/Users/AuthenticateByName' -d '@${payloads.auth}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth}'"
         ))
         client_token = client_auth_result["AccessToken"]
+        client_auth_result2 = json.loads(client.succeed(
+            f"curl -sf -X POST 'http://{server_ip}:8096/Users/AuthenticateByName' -d '@${payloads.auth}' -H 'Content-Type:application/json' -H 'X-Emby-Authorization:{client_auth2}'"
+        ))
+        client_token2 = client_auth_result2["AccessToken"]
 
         # Start playback
         playback_start = {

tests/minecraft.nix

@@ -60,6 +60,10 @@ testPkgs.testers.runNixOSTest {
         wants = lib.mkForce [ ];
         after = lib.mkForce [ ];
         requires = lib.mkForce [ ];
+        serviceConfig = {
+          Nice = lib.mkForce 0;
+          LimitMEMLOCK = lib.mkForce "infinity";
+        };
       };
 
       # Test-specific overrides only - reduce memory for testing

tests/ntfy-alerts.nix

@@ -0,0 +1,174 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  testPkgs = pkgs.appendOverlays [ (import ../modules/overlays.nix) ];
+in
+testPkgs.testers.runNixOSTest {
+  name = "ntfy-alerts";
+
+  nodes.machine =
+    { pkgs, ... }:
+    {
+      imports = [
+        ../modules/ntfy-alerts.nix
+      ];
+
+      system.stateVersion = config.system.stateVersion;
+
+      virtualisation.memorySize = 2048;
+
+      environment.systemPackages = with pkgs; [
+        curl
+        jq
+      ];
+
+      # Create test topic file
+      systemd.tmpfiles.rules = [
+        "f /run/ntfy-test-topic 0644 root root - test-alerts"
+      ];
+
+      # Mock ntfy server that records POST requests
+      systemd.services.mock-ntfy =
+        let
+          mockNtfyScript = pkgs.writeScript "mock-ntfy.py" ''
+            import json
+            import os
+            from http.server import HTTPServer, BaseHTTPRequestHandler
+            from datetime import datetime
+
+            REQUESTS_FILE = "/tmp/ntfy-requests.json"
+
+            class MockNtfy(BaseHTTPRequestHandler):
+                def _respond(self, code=200, body=b"Ok"):
+                    self.send_response(code)
+                    self.send_header("Content-Type", "application/json")
+                    self.end_headers()
+                    self.wfile.write(body if isinstance(body, bytes) else body.encode())
+
+                def do_GET(self):
+                    self._respond()
+
+                def do_POST(self):
+                    content_length = int(self.headers.get("Content-Length", 0))
+                    body = self.rfile.read(content_length).decode() if content_length > 0 else ""
+
+                    request_data = {
+                        "timestamp": datetime.now().isoformat(),
+                        "path": self.path,
+                        "headers": dict(self.headers),
+                        "body": body,
+                    }
+
+                    # Load existing requests or start new list
+                    requests = []
+                    if os.path.exists(REQUESTS_FILE):
+                        try:
+                            with open(REQUESTS_FILE, "r") as f:
+                                requests = json.load(f)
+                        except:
+                            requests = []
+
+                    requests.append(request_data)
+
+                    with open(REQUESTS_FILE, "w") as f:
+                        json.dump(requests, f, indent=2)
+
+                    self._respond()
+
+                def log_message(self, format, *args):
+                    pass
+
+            HTTPServer(("0.0.0.0", 8080), MockNtfy).serve_forever()
+          '';
+        in
+        {
+          description = "Mock ntfy server";
+          wantedBy = [ "multi-user.target" ];
+          before = [ "ntfy-alert@test-fail.service" ];
+          serviceConfig = {
+            ExecStart = "${pkgs.python3}/bin/python3 ${mockNtfyScript}";
+            Type = "simple";
+          };
+        };
+
+      # Test service that will fail
+      systemd.services.test-fail = {
+        description = "Test service that fails";
+        serviceConfig = {
+          Type = "oneshot";
+          ExecStart = "${pkgs.coreutils}/bin/false";
+        };
+      };
+
+      # Configure ntfy-alerts to use mock server
+      services.ntfyAlerts = {
+        enable = true;
+        serverUrl = "http://localhost:8080";
+        topicFile = "/run/ntfy-test-topic";
+
+      };
+    };
+
+  testScript = ''
+    import json
+    import time
+
+    start_all()
+
+    # Wait for mock ntfy server to be ready
+    machine.wait_for_unit("mock-ntfy.service")
+    machine.wait_until_succeeds("curl -sf http://localhost:8080/", timeout=30)
+
+    # Verify the ntfy-alert@ template service exists
+    machine.succeed("systemctl list-unit-files | grep ntfy-alert@")
+
+    # Verify the global OnFailure drop-in is configured
+    machine.succeed("cat /etc/systemd/system/service.d/onfailure.conf | grep -q 'OnFailure=ntfy-alert@%p.service'")
+
+    # Trigger the test-fail service
+    machine.succeed("systemctl start test-fail.service || true")
+
+    # Wait a moment for the failure notification to be sent
+    time.sleep(2)
+
+    # Verify the ntfy-alert@test-fail service ran
+    machine.succeed("systemctl is-active ntfy-alert@test-fail.service || systemctl is-failed ntfy-alert@test-fail.service || true")
+
+    # Check that the mock server received a POST request
+    machine.wait_until_succeeds("test -f /tmp/ntfy-requests.json", timeout=30)
+
+    # Verify the request content
+    result = machine.succeed("cat /tmp/ntfy-requests.json")
+    requests = json.loads(result)
+
+    assert len(requests) >= 1, f"Expected at least 1 request, got {len(requests)}"
+
+    # Check the first request
+    req = requests[0]
+    assert "/test-alerts" in req["path"], f"Expected path to contain /test-alerts, got {req['path']}"
+    assert "Title" in req["headers"], "Expected Title header"
+    assert "test-fail" in req["headers"]["Title"], f"Expected Title to contain 'test-fail', got {req['headers']['Title']}"
+    assert req["headers"]["Priority"] == "high", f"Expected Priority 'high', got {req['headers'].get('Priority')}"
+    assert req["headers"]["Tags"] == "warning", f"Expected Tags 'warning', got {req['headers'].get('Tags')}"
+
+    print(f"Received notification: Title={req['headers']['Title']}, Body={req['body'][:100]}...")
+
+    # Idempotency test: trigger failure again
+    machine.succeed("rm /tmp/ntfy-requests.json")
+    machine.succeed("systemctl reset-failed test-fail.service || true")
+    machine.succeed("systemctl start test-fail.service || true")
+    time.sleep(2)
+
+    # Verify another notification was sent
+    machine.wait_until_succeeds("test -f /tmp/ntfy-requests.json", timeout=30)
+    result = machine.succeed("cat /tmp/ntfy-requests.json")
+    requests = json.loads(result)
+    assert len(requests) >= 1, f"Expected at least 1 request after second failure, got {len(requests)}"
+
+    print("All tests passed!")
+  '';
+}

tests/tests.nix

@@ -21,4 +21,7 @@ in
   fail2banVaultwardenTest = handleTest ./fail2ban-vaultwarden.nix;
   fail2banImmichTest = handleTest ./fail2ban-immich.nix;
   fail2banJellyfinTest = handleTest ./fail2ban-jellyfin.nix;
+
+  # ntfy alerts test
+  ntfyAlertsTest = handleTest ./ntfy-alerts.nix;
 }