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Fix DNS routing: override Tailscale catch-all for mcp.metacircular.net

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Kyle Isom
2026-03-26 15:35:47 -07:00
parent e7d244c606
commit c8b271d6b9
1 changed files with 25 additions and 5 deletions
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30
hw/vade/default.nix
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@@ -41,13 +41,33 @@
];
# Route internal Metacircular zones to rift's CoreDNS (MCNS precursor).
# Uses systemd-resolved domain routing so rift handles only *.mcp.metacircular.net
# while DHCP/Tailscale DNS handles everything else.
# Tailscale sets ~. (catch-all) on tailscale0, which overrides global
# domain routing. We need a per-link override that takes priority.
# This systemd service runs after tailscale and adds the routing domain
# to a virtual interface that points at rift's CoreDNS.
networking.nameservers = [
"192.168.88.181"
"100.95.252.120"
];
services.resolved.domains = [
"~mcp.metacircular.net"
];
systemd.services.mcp-dns-route = {
description = "Route mcp.metacircular.net DNS to rift CoreDNS";
after = [ "network-online.target" "tailscaled.service" ];
wants = [ "network-online.target" ];
wantedBy = [ "multi-user.target" ];
# Tailscale sets ~. (catch-all) on tailscale0, overriding all other
# DNS routing. We replace it with specific routes: Tailscale names
# stay on Tailscale DNS, and mcp.metacircular.net goes to rift's
# CoreDNS (via the Tailscale overlay).
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
};
script = ''
# Add rift's CoreDNS alongside Tailscale's DNS on the tailscale0 link
${pkgs.systemd}/bin/resolvectl dns tailscale0 100.100.100.100 100.95.252.120
# Replace ~. with specific routing domains
${pkgs.systemd}/bin/resolvectl domain tailscale0 ~scylla-hammerhead.ts.net ~mcp.metacircular.net
'';
};
}