forked from Deuxfleurs/nixcfg
122 lines
4.1 KiB
Nix
122 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.wesher;
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in {
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options = with types; {
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services.wesher = {
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enable = mkEnableOption "wesher wireguard overlay mesh network manager";
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package = mkOption {
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type = package;
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default = pkgs.wesher;
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defaultText = literalExpression "pkgs.wesher";
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description = "Wesher package to use.";
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};
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clusterKey = mkOption {
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type = nullOr str;
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default = null;
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description = "shared key for cluster membership; must be 32 bytes base64 encoded; will be generated if not provided";
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};
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bindAddr = mkOption {
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type = nullOr str;
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default = null;
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description = "IP address to bind to for cluster membership (cannot be used with --bind-iface)";
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};
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bindIface = mkOption {
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type = nullOr str;
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default = null;
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description = "Interface to bind to for cluster membership (cannot be used with --bind-addr)";
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};
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join = mkOption {
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type = listOf str;
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default = [];
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description = "list of hostnames or IP addresses to existing cluster members; if not provided, will attempt resuming any known state or otherwise wait for further members";
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};
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clusterPort = mkOption {
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type = port;
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default = 7946;
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description = "port used for membership gossip traffic (both TCP and UDP); must be the same accross cluster";
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};
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wireguardPort = mkOption {
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type = port;
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default = 51820;
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description = "port used for wireguard traffic (UDP); must be the same accross cluster";
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};
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overlayNet = mkOption {
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type = str;
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default = "10.0.0.0/8";
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description = "the network in which to allocate addresses for the overlay mesh network (CIDR format); smaller networks increase the chance of IP collision";
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};
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interface = mkOption {
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type = str;
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default = "wgoverlay";
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description = "name of the wireguard interface to create and manage";
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};
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logLevel = mkOption {
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type = str;
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default = "warn";
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description = "set the verbosity (one of debug/info/warn/error)";
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};
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};
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};
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config = mkIf cfg.enable (let binWesher = cfg.package + "/bin/wesher";
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in {
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systemd.services.wesher = {
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description = "wesher wireguard overlay mesh network manager";
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bindsTo = [ "network-online.target" ];
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after = [ "network-online.target" ];
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wantedBy = [ "multi-user.target" ];
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environment = {
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WESHER_JOIN = builtins.concatStringsSep "," cfg.join;
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WESHER_CLUSTER_PORT = builtins.toString cfg.clusterPort;
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WESHER_WIREGUARD_PORT = builtins.toString cfg.wireguardPort;
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WESHER_OVERLAY_NET = cfg.overlayNet;
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WESHER_INTERFACE = cfg.interface;
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WESHER_LOG_LEVEL = cfg.logLevel;
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WESHER_NO_ETC_HOSTS = "true";
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}
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// (if (cfg.clusterKey != null) then { WESHER_CLUSTER_KEY = cfg.clusterKey; } else {})
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// (if (cfg.bindAddr != null) then { WESHER_BIND_ADDR = cfg.bindAddr; } else {})
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// (if (cfg.bindIface != null) then { WESHER_BIND_IFACE = cfg.bindIface; } else {})
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;
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serviceConfig = {
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ExecStart = "${binWesher}";
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Restart = "always";
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User = "wesher";
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DynamicUser = true;
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StateDirectory = "wesher";
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AmbientCapabilities = "CAP_NET_ADMIN CAP_NET_BIND_SERVICE";
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CapabilityBoundingSet = "CAP_NET_ADMIN CAP_NET_BIND_SERVICE";
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MemoryDenyWriteExecute = true;
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ProtectControlGroups = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6 AF_NETLINK";
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RestrictNamespaces = true;
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RestrictRealtime = true;
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SystemCallArchitectures = "native";
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SystemCallFilter = "~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io @resources";
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};
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};
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networking.firewall.allowedUDPPorts = mkIf cfg.enable [ cfg.clusterPort cfg.wireguardPort ];
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networking.firewall.allowedTCPPorts = mkIf cfg.enable [ cfg.clusterPort ];
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});
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}
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