nixos/services/sabnzbd.nix
ediblerope 1f07b05c12 sabnzbd: tighten host_whitelist for *arr local calls + group consistency
Two small follow-ups to the SAB module:

- Extend host_whitelist to also include 127.0.0.1 + localhost. SAB's
  local-IP bypass usually handles this, but Sonarr/Radarr's "Hostname
  verification failed" error becomes a real footgun if it ever flips.
- Add extraGroups = [ "media" ] for parity with sonarr/radarr/qbittorrent.
  No functional change since group = "media" already.

Also wires SABnzbd into arr-interconnect: extracts api_key from
sabnzbd.ini and POSTs a Sabnzbd download client into Sonarr (tv-sonarr
category) and Radarr (radarr category). Idempotent like the existing
qBittorrent block; silently skips on first boot before SAB has materialised
its config.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-04 19:25:07 +01:00

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2.2 KiB
Nix

{ config, pkgs, lib, ... }:
let
# SAB rejects requests whose Host header isn't in host_whitelist. We need:
# - sabnzbd.nordhammer.it (the nginx-fronted public path)
# - 127.0.0.1 + localhost (so Sonarr/Radarr can hit SAB locally via
# arr-interconnect without hitting "Hostname verification failed")
patchConfig = pkgs.writeShellScript "sabnzbd-patch-config" ''
CONFIG=/var/lib/sabnzbd/sabnzbd.ini
WHITELIST="sabnzbd.nordhammer.it,127.0.0.1,localhost"
if [ ! -f "$CONFIG" ]; then
printf '[misc]\nhost_whitelist = %s\nport = 8085\n' "$WHITELIST" > "$CONFIG"
exit 0
fi
if ${pkgs.gnugrep}/bin/grep -q "^host_whitelist" "$CONFIG"; then
${pkgs.gnused}/bin/sed -i "s/^host_whitelist =.*/host_whitelist = $WHITELIST/" "$CONFIG"
else
${pkgs.gnused}/bin/sed -i "/^\[misc\]/a host_whitelist = $WHITELIST" "$CONFIG"
fi
'';
in
{
config = lib.mkIf (config.networking.hostName == "FredOS-Mediaserver") {
users.users.sabnzbd = {
isSystemUser = true;
group = "media";
extraGroups = [ "media" ];
};
systemd.tmpfiles.rules = [
"d /var/lib/sabnzbd 0755 sabnzbd media -"
"Z /var/lib/sabnzbd 0755 sabnzbd media -"
"d /mnt/storage/usenet/downloads 2775 sabnzbd media -"
"Z /mnt/storage/usenet/downloads 2775 sabnzbd media -"
"d /mnt/storage/usenet/incomplete 2775 sabnzbd media -"
"Z /mnt/storage/usenet/incomplete 2775 sabnzbd media -"
];
systemd.services.sabnzbd = {
description = "SABnzbd usenet downloader";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "simple";
User = "sabnzbd";
Group = "media";
ExecStartPre = patchConfig;
ExecStart = "${pkgs.sabnzbd}/bin/sabnzbd --config-file /var/lib/sabnzbd/sabnzbd.ini --server 127.0.0.1:8085";
Restart = "on-failure";
UMask = "0002";
NoNewPrivileges = true;
PrivateTmp = true;
ProtectSystem = "strict";
ProtectHome = false;
ReadWritePaths = [
"/var/lib/sabnzbd"
"/mnt/storage/usenet"
];
WorkingDirectory = "/var/lib/sabnzbd";
};
};
};
}