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{ config, lib, pkgs, ... }:
with lib;
let cfg = config.services.tailscale;
in {
meta.maintainers = with maintainers; [ danderson mbaillie ];
options.services.tailscale = {
enable = mkEnableOption "Tailscale client daemon";
port = mkOption {
type = types.port;
default = 41641;
description = "The port to listen on for tunnel traffic (0=autoselect).";
};
interfaceName = mkOption {
type = types.str;
default = "tailscale0";
description = ''The interface name for tunnel traffic. Use "userspace-networking" (beta) to not use TUN.'';
};
permitCertUid = mkOption {
type = types.nullOr types.nonEmptyStr;
default = null;
description = "Username or user ID of the user allowed to to fetch Tailscale TLS certificates for the node.";
};
package = mkOption {
type = types.package;
default = pkgs.tailscale;
defaultText = literalExpression "pkgs.tailscale";
description = "The package to use for tailscale";
};
};
config = mkIf cfg.enable {
environment.systemPackages = [ cfg.package ]; # for the CLI
systemd.packages = [ cfg.package ];
systemd.services.tailscaled = {
wantedBy = [ "multi-user.target" ];
path = [ pkgs.openresolv pkgs.procps ];
serviceConfig.Environment = [
"PORT=${toString cfg.port}"
''"FLAGS=--tun ${lib.escapeShellArg cfg.interfaceName}"''
] ++ (lib.optionals (cfg.permitCertUid != null) [
"TS_PERMIT_CERT_UID=${cfg.permitCertUid}"
]);
# Restart tailscaled with a single `systemctl restart` at the
# end of activation, rather than a `stop` followed by a later
# `start`. Activation over Tailscale can hang for tens of
# seconds in the stop+start setup, if the activation script has
# a significant delay between the stop and start phases
# (e.g. script blocked on another unit with a slow shutdown).
#
# Tailscale is aware of the correctness tradeoff involved, and
# already makes its upstream systemd unit robust against unit
# version mismatches on restart for compatibility with other
# linux distros.
stopIfChanged = false;
};
};
}
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