129 lines
3.2 KiB
Nix
129 lines
3.2 KiB
Nix
# The NixOS module does not support extending the configuration with secrets.
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{ config, lib, pkgs, ... }:
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let
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fqdn = "turn.sbruder.de";
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ipAddresses = [ "195.201.139.15" "2a01:4f8:1c1c:4397::" ];
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cfg = {
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# config adapted from synapse’s turn howto:
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# https://github.com/matrix-org/synapse/blob/develop/docs/turn-howto.md
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use-auth-secret = true;
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realm = fqdn;
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# not needed for VoIP
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no-tcp-relay = true;
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# only tls
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no-cli = true;
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no-tcp = true;
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no-udp = true;
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tls-listening-port = 5349;
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cert = "/run/turnserver/fullchain.pem";
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pkey = "/run/turnserver/key.pem";
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min-port = 49160;
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max-port = 49200;
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listening-ip = ipAddresses;
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relay-ip = ipAddresses;
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pidfile = "/run/turnserver/turnserver.pid";
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# logging
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no-stdout-log = true;
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syslog = true;
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denied-peer-ip = [
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"10.0.0.0-10.255.255.255"
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"172.16.0.0-172.31.255.255"
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"192.168.0.0-192.168.255.255"
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];
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user-quota = 12;
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total-quota = 1200;
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};
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extraConfigFiles = with config.sops.secrets; [
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turn-static-auth-secret.path
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];
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configToText = config: lib.concatStrings
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(lib.mapAttrsToList
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(name: value:
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if lib.isList value
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then
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lib.concatMapStrings
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(value: "${name}=${toString value}\n")
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value
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else
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(if lib.isBool value
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then "${name}\n"
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else "${name}=${toString value}\n"))
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config);
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configFile = pkgs.writeText "turnserver.conf" (configToText cfg);
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in
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{
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sops.secrets.turn-static-auth-secret = {
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owner = "turnserver";
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sopsFile = ../secrets.yaml;
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};
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users.users.turnserver = {
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uid = config.ids.uids.turnserver;
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};
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users.groups.turnserver = {
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gid = config.ids.gids.turnserver;
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members = [ "turnserver" ];
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};
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systemd.services.coturn = {
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after = [ "network-online.target" "acme-finished-${fqdn}.target" ];
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wants = [ "network-online.target" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "simple";
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ExecStartPre = [
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("!" + (pkgs.writeShellScript "coturn-setup-tls" ''
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cp ${config.security.acme.certs."${fqdn}".directory}/{fullchain,key}.pem /run/turnserver/
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chgrp turnserver /run/turnserver/{fullchain,key}.pem
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''))
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(pkgs.writeShellScript "coturn-setup-config" ''
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${pkgs.coreutils}/bin/cat ${configFile} ${lib.concatStringsSep " " extraConfigFiles} > /run/turnserver/turnserver.conf
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'')
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];
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ExecStart = "${pkgs.coturn}/bin/turnserver -c /run/turnserver/turnserver.conf";
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Restart = "on-abort";
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RuntimeDirectory = "turnserver";
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RuntimeDirectoryMode = "0750";
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User = "turnserver";
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Group = "turnserver";
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SupplementaryGroups = lib.singleton "keys";
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};
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};
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security.acme.certs."${fqdn}".postRun = ''
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if systemctl is-active coturn; then
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systemctl --no-block restart coturn
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fi
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'';
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services.nginx.virtualHosts."${fqdn}" = {
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enableACME = true;
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forceSSL = true;
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};
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networking.firewall = {
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allowedTCPPorts = [ cfg.tls-listening-port ];
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allowedUDPPorts = [ cfg.tls-listening-port ];
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allowedUDPPortRanges = lib.singleton {
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from = cfg.min-port;
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to = cfg.min-port;
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};
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};
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}
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