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[Backport release-24.05] nixos/tailscale: add extraSetFlags to configure daemon #333049

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Aug 7, 2024
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[Backport release-24.05] nixos/tailscale: add extraSetFlags to configure daemon #333049

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23 changes: 22 additions & 1 deletion nixos/modules/services/networking/tailscale.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -61,12 +61,21 @@ in {
};

extraUpFlags = mkOption {
description = "Extra flags to pass to {command}`tailscale up`.";
description = ''
Extra flags to pass to {command}`tailscale up`. Only applied if `authKeyFile` is specified.";
'';
type = types.listOf types.str;
default = [];
example = ["--ssh"];
};

extraSetFlags = mkOption {
description = "Extra flags to pass to {command}`tailscale set`.";
type = types.listOf types.str;
default = [];
example = ["--advertise-exit-node"];
};

extraDaemonFlags = mkOption {
description = "Extra flags to pass to {command}`tailscaled`.";
type = types.listOf types.str;
Expand Down Expand Up @@ -120,6 +129,18 @@ in {
'';
};

systemd.services.tailscaled-set = mkIf (cfg.extraSetFlags != []) {
after = ["tailscaled.service"];
wants = ["tailscaled.service"];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
};
script = ''
${cfg.package}/bin/tailscale set ${escapeShellArgs cfg.extraSetFlags}
'';
};

boot.kernel.sysctl = mkIf (cfg.useRoutingFeatures == "server" || cfg.useRoutingFeatures == "both") {
"net.ipv4.conf.all.forwarding" = mkOverride 97 true;
"net.ipv6.conf.all.forwarding" = mkOverride 97 true;
Expand Down