70 lines
2 KiB
Nix
70 lines
2 KiB
Nix
{ lib, pkgs, config, ... }:
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with lib;
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with lib.plusultra;
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let cfg = config.plusultra.services.tailscale;
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in
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{
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options.plusultra.services.tailscale = with types; {
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enable = mkBoolOpt false "Whether or not to configure Tailscale";
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autoconnect = {
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enable = mkBoolOpt false "Whether or not to enable automatic connection to Tailscale";
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key = mkOpt str "" "The authentication key to use";
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};
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};
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config = mkIf cfg.enable {
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assertions = [
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{
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assertion = cfg.autoconnect.enable -> cfg.autoconnect.key != "";
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message = "plusultra.services.tailscale.autoconnect.key must be set";
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}
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];
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environment.systemPackages = with pkgs; [ tailscale ];
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services.tailscale = enabled;
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networking = {
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firewall = {
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trustedInterfaces = [ config.services.tailscale.interfaceName ];
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allowedUDPPorts = [ config.services.tailscale.port ];
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# Strict reverse path filtering breaks Tailscale exit node use and some subnet routing setups.
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checkReversePath = "loose";
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};
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networkmanager.unmanaged = [ "tailscale0" ];
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};
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systemd.services.tailscale-autoconnect = mkIf cfg.autoconnect.enable {
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description = "Automatic connection to Tailscale";
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# Make sure tailscale is running before trying to connect to tailscale
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after = [ "network-pre.target" "tailscale.service" ];
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wants = [ "network-pre.target" "tailscale.service" ];
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wantedBy = [ "multi-user.target" ];
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# Set this service as a oneshot job
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serviceConfig.Type = "oneshot";
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# Have the job run this shell script
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script = with pkgs; ''
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# Wait for tailscaled to settle
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sleep 2
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# Check if we are already authenticated to tailscale
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status="$(${tailscale}/bin/tailscale status -json | ${jq}/bin/jq -r .BackendState)"
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if [ $status = "Running" ]; then # if so, then do nothing
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exit 0
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fi
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# Otherwise authenticate with tailscale
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${tailscale}/bin/tailscale up -authkey "${cfg.autoconnect.key}"
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'';
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};
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};
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}
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