darmanandClaude Opus 4.8
d9ea6a9ecc
mercury was the only host with no tailscale at all -- no module import, no secret, no key in its sops file. It had been enrolled before the NixOS migration and silently dropped off the tailnet when it was reflashed with a config that omitted it. --accept-dns=false, as on neptun and for a sharper reason: headscale pushes override_local_dns, so accepting MagicDNS would repoint the LAN's own DNS server at 100.100.100.100 and make house-wide name resolution depend on tailscaled being up. This host has already deadlocked once on boot-time DNS (see CLAUDE.md). darman_password is also rotated: the account had "!" in /etc/shadow, because on mercury's first boot the secret wasn't readable yet and update-users-groups.pl falls back to a locked account. mutableUsers is true, so no later rebuild ever revisited it and the lock was permanent. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
56 lines
2.8 KiB
Nix
56 lines
2.8 KiB
Nix
{ config, pkgs, lib, ... }:
|
|
|
|
# mercury — Raspberry Pi 3B+ (aarch64). Network DNS + DHCP (+ adblock).
|
|
# Boots from an SD image (see flake: nixosConfigurations.mercury), so there is
|
|
# no disko / hardware-configuration here — the sd-image module provides them.
|
|
{
|
|
imports = [
|
|
../../common.nix # shared base: user / ssh / nix / firewall
|
|
./secrets.nix # sops-nix: darman password (age key on boot part.)
|
|
../../services/network/unbound.nix # local recursive resolver (127.0.0.1:5335)
|
|
../../services/network/pihole.nix # DNS adblock + DHCP (declarative static leases)
|
|
../../services/vpn/tailscale.nix # tailnet node (headscale on neptun)
|
|
];
|
|
|
|
networking.hostName = "mercury";
|
|
|
|
# ---- Static networking ----
|
|
# A DNS/DHCP server must have a fixed address. Fill in the Pi's real values
|
|
# (from `ip -brief a` / `ip route` on the running Pi). eth0 = the Pi's NIC.
|
|
networking.useDHCP = false;
|
|
networking.usePredictableInterfaceNames = false; # keep it named eth0
|
|
networking.interfaces.eth0.ipv4.addresses = [
|
|
{ address = "10.0.0.10"; prefixLength = 24; } # the Pi's current IP
|
|
];
|
|
# Stable IPv6 (FRITZ!Box ULA prefix) so mercury is a fixed IPv6 DNS target.
|
|
# SLAAC still provides the GUA + default route. Announce THIS address as the
|
|
# DNSv6 server in the FRITZ!Box so IPv6 clients resolve .sol via pihole.
|
|
networking.interfaces.eth0.ipv6.addresses = [
|
|
{ address = "fd18:df17:9078:0::10"; prefixLength = 64; }
|
|
];
|
|
# VERIFY with `ip route` on the Pi — assuming the router is .1.
|
|
networking.defaultGateway = { address = "10.0.0.1"; interface = "eth0"; };
|
|
# Resolvers for the Pi's OWN lookups (not the LAN service). Kept public so the
|
|
# host resolves during boot without depending on its own pihole/unbound.
|
|
networking.nameservers = [ "1.1.1.1" "9.9.9.9" ];
|
|
|
|
# Never take MagicDNS on THIS host. headscale pushes override_local_dns, so
|
|
# accepting it would repoint mercury's resolv.conf at 100.100.100.100 and
|
|
# make the LAN's DNS server depend on tailscaled to resolve anything — the
|
|
# same boot-time DNS deadlock this host already hit once (see CLAUDE.md),
|
|
# except a failure here takes the whole network's DNS down with it.
|
|
services.tailscale.extraUpFlags = [ "--accept-dns=false" ];
|
|
|
|
# ---- pihole web admin password (from sops) ----
|
|
# The pihole container reads FTLCONF_* env vars. Render an env file from the
|
|
# sops secret and feed it to the container — password stays out of repo/store.
|
|
sops.secrets.pihole_webpassword = { };
|
|
sops.templates."pihole.env".content =
|
|
"FTLCONF_webserver_api_password=${config.sops.placeholder.pihole_webpassword}";
|
|
virtualisation.oci-containers.containers.pihole.environmentFiles =
|
|
[ config.sops.templates."pihole.env".path ];
|
|
|
|
# Do not modify after first flash.
|
|
system.stateVersion = "26.05";
|
|
}
|