From 5fcdceb0b2edf283c4bd041e751a380b45bd2243 Mon Sep 17 00:00:00 2001
From: misuzu <bakalolka@gmail.com>
Date: Sun, 14 Aug 2022 19:40:31 +0300
Subject: [PATCH] nixos/netbird: init

---
 .../from_md/release-notes/rl-2211.section.xml |  7 ++
 .../manual/release-notes/rl-2211.section.md   |  3 +
 nixos/modules/module-list.nix                 |  1 +
 nixos/modules/services/networking/netbird.nix | 64 +++++++++++++++++++
 4 files changed, 75 insertions(+)
 create mode 100644 nixos/modules/services/networking/netbird.nix

diff --git a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
index f525e6a7fc4d..c3c3a5d92ecf 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
@@ -205,6 +205,13 @@
           <link linkend="opt-services.outline.enable">services.outline</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://netbird.io">netbird</link>, a zero
+          configuration VPN. Available as
+          <link xlink:href="options.html#opt-services.netbird.enable">services.netbird</link>.
+        </para>
+      </listitem>
       <listitem>
         <para>
           <link xlink:href="https://github.com/aiberia/persistent-evdev">persistent-evdev</link>,
diff --git a/nixos/doc/manual/release-notes/rl-2211.section.md b/nixos/doc/manual/release-notes/rl-2211.section.md
index f0a0a026d8aa..0e0ae598b342 100644
--- a/nixos/doc/manual/release-notes/rl-2211.section.md
+++ b/nixos/doc/manual/release-notes/rl-2211.section.md
@@ -76,6 +76,9 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - [Outline](https://www.getoutline.com/), a wiki and knowledge base similar to Notion. Available as [services.outline](#opt-services.outline.enable).
 
+- [netbird](https://netbird.io), a zero configuration VPN.
+  Available as [services.netbird](options.html#opt-services.netbird.enable).
+
 - [persistent-evdev](https://github.com/aiberia/persistent-evdev), a daemon to add virtual proxy devices that mirror a physical input device but persist even if the underlying hardware is hot-plugged. Available as [services.persistent-evdev](#opt-services.persistent-evdev.enable).
 
 - [schleuder](https://schleuder.org/), a mailing list manager with PGP support. Enable using [services.schleuder](#opt-services.schleuder.enable).
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 31a4107b3eeb..e632a760f892 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -861,6 +861,7 @@
   ./services/networking/nbd.nix
   ./services/networking/ndppd.nix
   ./services/networking/nebula.nix
+  ./services/networking/netbird.nix
   ./services/networking/networkmanager.nix
   ./services/networking/nextdns.nix
   ./services/networking/nftables.nix
diff --git a/nixos/modules/services/networking/netbird.nix b/nixos/modules/services/networking/netbird.nix
new file mode 100644
index 000000000000..806b72d5f3a7
--- /dev/null
+++ b/nixos/modules/services/networking/netbird.nix
@@ -0,0 +1,64 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.netbird;
+  kernel = config.boot.kernelPackages;
+  interfaceName = "wt0";
+in {
+  meta.maintainers = with maintainers; [ misuzu ];
+
+  options.services.netbird = {
+    enable = mkEnableOption "Netbird daemon";
+    package = mkOption {
+      type = types.package;
+      default = pkgs.netbird;
+      defaultText = literalExpression "pkgs.netbird";
+      description = "The package to use for netbird";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    boot.extraModulePackages = optional (versionOlder kernel.kernel.version "5.6") kernel.wireguard;
+
+    environment.systemPackages = [ cfg.package ];
+
+    networking.dhcpcd.denyInterfaces = [ interfaceName ];
+
+    systemd.network.networks."50-netbird" = mkIf config.networking.useNetworkd {
+      matchConfig = {
+        Name = interfaceName;
+      };
+      linkConfig = {
+        Unmanaged = true;
+        ActivationPolicy = "manual";
+      };
+    };
+
+    systemd.services.netbird = {
+      description = "A WireGuard-based mesh network that connects your devices into a single private network";
+      documentation = [ "https://netbird.io/docs/" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        AmbientCapabilities = [ "CAP_NET_ADMIN" ];
+        DynamicUser = true;
+        Environment = [
+          "NB_CONFIG=/var/lib/netbird/config.json"
+          "NB_LOG_FILE=console"
+        ];
+        ExecStart = "${cfg.package}/bin/netbird service run";
+        Restart = "always";
+        RuntimeDirectory = "netbird";
+        StateDirectory = "netbird";
+        WorkingDirectory = "/var/lib/netbird";
+      };
+      unitConfig = {
+        StartLimitInterval = 5;
+        StartLimitBurst = 10;
+      };
+      stopIfChanged = false;
+    };
+  };
+}