nixos/services/sabnzbd.nix
rope 40ef4444fa sabnzbd: point complete_dir at group-writable pool path + permissions=0775
Fixes Sonarr/Radarr import fail-loop (can't delete sources → mergerfs thrash).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-21 09:42:10 +01:00

83 lines
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3 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"
# Completed downloads must land on the setgid, group-writable pool dir
# (see tmpfiles below), NOT sabnzbd's default /var/lib/sabnzbd/Downloads/
# complete which is 0755 there Sonarr/Radarr (group media) can copy the
# file out but can't delete the source, so imports fail-loop forever with
# "Permission denied" and thrash the mergerfs pool. permissions=0775 makes
# sabnzbd force group-write on completed files/dirs so the *arrs can remove
# them after import.
COMPLETE_DIR="/mnt/storage/usenet/downloads"
PERMISSIONS="0775"
if [ ! -f "$CONFIG" ]; then
printf '[misc]\nhost_whitelist = %s\nport = 8085\ncomplete_dir = %s\npermissions = %s\n' \
"$WHITELIST" "$COMPLETE_DIR" "$PERMISSIONS" > "$CONFIG"
exit 0
fi
# Idempotently set a key in the [misc] section (create or replace).
set_misc() {
key="$1"; val="$2"
if ${pkgs.gnugrep}/bin/grep -q "^$key" "$CONFIG"; then
${pkgs.gnused}/bin/sed -i "s|^$key =.*|$key = $val|" "$CONFIG"
else
${pkgs.gnused}/bin/sed -i "/^\[misc\]/a $key = $val" "$CONFIG"
fi
}
set_misc host_whitelist "$WHITELIST"
set_misc complete_dir "$COMPLETE_DIR"
set_misc permissions "$PERMISSIONS"
'';
in
{
config = lib.mkIf (config.networking.hostName == "FredOS-Mediaserver") {
users.users.sabnzbd = {
isSystemUser = true;
group = "media";
extraGroups = [ "media" ];
};
systemd.tmpfiles.rules = [
"d /var/lib/sabnzbd 0755 sabnzbd media -"
"Z /var/lib/sabnzbd 0755 sabnzbd media -"
"d /mnt/storage/usenet/downloads 2775 sabnzbd media -"
"Z /mnt/storage/usenet/downloads 2775 sabnzbd media -"
"d /mnt/storage/usenet/incomplete 2775 sabnzbd media -"
"Z /mnt/storage/usenet/incomplete 2775 sabnzbd media -"
];
systemd.services.sabnzbd = {
description = "SABnzbd usenet downloader";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "simple";
User = "sabnzbd";
Group = "media";
ExecStartPre = patchConfig;
ExecStart = "${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";
};
};
};
}