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Add systemd service to route joshuabell.xyz via Tailscale DNS

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This commit is contained in:
Joshua Bell 2026-02-08 23:42:06 -06:00
parent aab8691c7b
commit ff7bb9a36e
1 changed files with 32 additions and 0 deletions
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32
flakes/common/nix_modules/tailnet.nix
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@ -29,6 +29,38 @@ in
];
};
# Route joshuabell.xyz DNS queries through Tailscale for extra_records defined in headscale
# This adds ~joshuabell.xyz as a routing domain alongside the MagicDNS domain
systemd.services.tailscale-dns-routes = {
description = "Configure DNS routing for Tailscale extra_records";
after = [ "tailscaled.service" "systemd-resolved.service" ];
requires = [ "tailscaled.service" "systemd-resolved.service" ];
wantedBy = [ "multi-user.target" ];
# Wait for tailscale0 interface to be up and have DNS configured
script = ''
# Wait for tailscale to be connected and DNS configured
for i in $(seq 1 30); do
if ${pkgs.iproute2}/bin/ip link show tailscale0 &>/dev/null && \
${pkgs.systemd}/bin/resolvectl status tailscale0 2>/dev/null | grep -q "DNS Servers"; then
break
fi
sleep 1
done
# Add joshuabell.xyz to the routing domains (keeping existing ones)
current_domains=$(${pkgs.systemd}/bin/resolvectl domain tailscale0 2>/dev/null | grep -oP '(?<=tailscale0: ).*' || echo "")
if ! echo "$current_domains" | grep -q "joshuabell.xyz"; then
${pkgs.systemd}/bin/resolvectl domain tailscale0 $current_domains ~joshuabell.xyz
echo "Added ~joshuabell.xyz to tailscale0 DNS routing domains"
else
echo "joshuabell.xyz already in routing domains"
fi
'';
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
};
};
systemd.services.tailscaled = {
after = [
"systemd-modules-load.service"