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>
pihole.toml is nix-managed read-only so 'pihole setpassword' fails. pihole-FTL
reads FTLCONF_* env vars (override the toml) — render an env file from the sops
secret pihole_webpassword and feed it via EnvironmentFile. Password stays out of
repo/store. VERIFIED in VM: FTLCONF_webserver_api_password -> API login works.
- after dd, if ~/.config/homelab/<config>/age.txt exists, mount the FAT boot
partition and drop it as sops-age.txt (mercury). Key stays off-repo + out of
the store + out of the image; no manual mount step.
- per-host darman_password (distinct hash) in secrets/{jupiter,vps,mercury}.yaml
-> hashedPasswordFile; different console password per host (ssh still key-only)
- mercury: dedicated age key (on boot partition post-flash), sops-nix wired
- AdGuard: module has no secret hook + writable config -> mutableSettings=true,
admin password set via web setup on first boot (never in repo/store)
darmanandClaude Opus 4.8