---
type: reference
title: *arr Stack
description: The *arr automation stack (Prowlarr, Sonarr, Radarr, Lidarr, Readarr, qBittorrent) on FrankBook-Pro — topology, wiring, auth posture, and gotchas.
tags: [arr-stack, prowlarr, sonarr, radarr, lidarr, readarr, qbittorrent, frankbook-pro]
timestamp: 2026-09-03T00:00:00Z
---

# *arr Stack

The *arr suite is a collection of automated media management tools for Usenet
and BitTorrent. The stack runs on **FrankBook-Pro** — the Mac mini that fronts
this household's downloads — as quadlet units inside its podman machine, not on
Dankserver. It provides automatic downloading and library management that
Copyparty alone does not cover: quality profile enforcement, series/movie
discovery, metadata enrichment, and automated file organization.

The core chain is: **Prowlarr** (indexer API aggregator) →
**Sonarr/Radarr/Lidarr/Readarr** (media-specific managers) → **qBittorrent**
(download client, sharing the [[Gluetun]] WireGuard tunnel netns) →
**Jellyfin** (media server scan → auto-refresh).

## Service Overview

| Service | Role | Image | Port | Min RAM |
|---------|------|-------|------|---------|
| Prowlarr | Indexer management | `lscr.io/linuxserver/prowlarr:latest` | 9696 | 256 MB |
| Radarr | Movie management | `lscr.io/linuxserver/radarr:latest` | 7878 | 512 MB |
| Sonarr | TV show management | `lscr.io/linuxserver/sonarr:latest` | 8989 | 512 MB |
| Lidarr | Music management | `lscr.io/linuxserver/lidarr:latest` | 8686 | 256 MB |
| Readarr | Ebook/audiobook management | `lscr.io/linuxserver/readarr:amd64-1.0.980` (pinned — LSIO ships no untagged `latest` for readarr) | 8787 | 256 MB |
| qBittorrent | Torrent download client | `lscr.io/linuxserver/qbittorrent:4.6.7` (pinned; see [[qBittorrent]]) | 8080 (published by the gluetun unit) | 512 MB |

Jackett and Whisparr were evaluated as optional extras but never deployed
(no unit, no vhost, no live container).

## Deployment shape (current)

Each service is a quadlet `.container` unit in this repo under
`frankbook-pro/<svc>/quadlet/`, installed inside the podman machine at
`/home/core/.config/containers/systemd/<svc>.service` by the frankbook-pro
handler in `scripts/deploy-remote.sh`. Every unit runs with
`PUID=0 PGID=0 TZ=America/Los_Angeles UMASK_SET=022`, mounts its config root at
`/Volumes/COMPLETE/<svc>-data:/config`, publishes its API port on the host, and
runs `Restart=always` with `TimeoutStartSec=900`.

qBittorrent is special: it shares the [[Gluetun]] container's network namespace
(`Network=gluetun.container`) so torrent egress never touches the residential
IP. A netns-sharer publishes no ports of its own — qB's WebUI (8080) and
BitTorrent port (6881 TCP+UDP) are published on the gluetun unit instead.

## Historical design-era compose (retired)

The original design deployed the stack on Dankserver via
`dankserver/compose.yaml` with `/opt/<svc>/config` data roots and
`TZ=America/New_York`. That layout is retired; `dankserver/compose.yaml` is
kept as reference only. Reality (unit files above) wins: data roots are the
Mac's `/Volumes/COMPLETE` (completed media) and `/Volumes/INCOMPLETE`
(in-flight downloads) volumes, mounted into qB at identical paths, and every
unit runs `TZ=America/Los_Angeles`.

## Access / auth posture

There is **no Caddy vhost for any arr app** — the *arr stack is exempt by
construction from the Anubis guard chain (its own auth). The stack is reached
directly by IP:port on the LAN (`http://<frankbook-pro>:8989` etc.).

Auth-config history (verified live 2026-08-29): all five arrs shipped with
`AuthenticationMethod=None` **plus** `AuthenticationRequired=Enabled`. On the
v1 (.NET) apps that combo is self-contradictory — UI Save is permanently
disabled and any settings save throws `DryIoc.ScopedItemException` inside
`AuthorizationMiddleware` (500 sprawl on every page after restart). The valid
representation of "no auth" in v1 is **absence of the `<AuthenticationRequired>`
key**, not the literal string `Disabled` — readarr's config (key absent) booted
clean while its three siblings (key=`Disabled`) 500-sprawled, which is how it
was caught. Fix applied live: key deleted on sonarr/radarr/lidarr/prowlarr,
containers restarted, all five verified serving. Posture = zero-auth arrs on
LAN and WAN; the Anubis wall guards homepage/search/hermes/prometheus/romm/files
but **not** the arrs — first-account-wins is the current race condition if that
ever flips to `External` auth (needs an IdP first; auth method choice remains an
operator decision).

## Chain wiring (verified live 2026-08-30)

The download chain is wired and test-first verified: **indexers → Prowlarr →
per-arr qBittorrent clients (category = app name) → import**.

- qB webUI auth is ON (`admin` + generated password; verify before writing it
  into any config — it was generated at first boot, not a default).
- Per-arr QBittorrent download clients exist on sonarr/radarr/lidarr
  (enabled) and readarr (**parked**: its qB proxy fails auth live even with
  correct creds — known defect of the abandoned upstream; do not enable until
  the image changes). Each was **tested before enabling**; failures stay parked
  with a reason, never enabled blind.
- Prowlarr runs v2.5.2 where apps are first-class rows (`Applications` table):
  four Application rows (sonarr/radarr/lidarr/readarr) now carry each arr's
  real baseUrl+apiKey with `SyncLevel=FullSync`. Before this, the table was
  empty and every sync attempt threw `NullConfig` in `GetIndexerMappings()` —
  visible in `podman logs prowlarr`, not in any UI.
- Indexers are **test-before-enable**: EZTV and 1337x stay disabled with reason
  "blocked by CloudFlare Protection" (this host's egress ASN is CF-blocked at
  those trackers); Nyaa.si, sukebei, RuTor, Byrutor, YTS passed live tests and
  are enabled. A failed test = parked with reason, never enabled blind.
- Prowlarr v2 sync model: indexers stay in Prowlarr; arrs search *through* it
  and hand off to their own qB download client (category routing). Mappings
  materialize at grab time — zero mappings right after wiring is expected,
  not a fault.

## Disk layout (current)

```
/Volumes/COMPLETE            <- completed-media volume (Mac volume)
├── sonarr-data:/config      <- per-app config roots, one per unit
├── radarr-data:/config
├── lidarr-data:/config
├── readarr-data:/config
├── qbittorrent-data:/config
└── <movie/tv/music/books roots>   <- arr import roots live here
/Volumes/INCOMPLETE          <- qB in-flight downloads (same path inside qB)
```

qB mounts both volumes at their identical host paths
(`Volume=/Volumes/COMPLETE:/Volumes/COMPLETE`,
`Volume=/Volumes/INCOMPLETE:/Volumes/INCOMPLETE`), so a category's download path
is the same string on every container that touches it — no remapping between
download and import.

## Gotchas

- **Timezone:** every unit runs `TZ=America/Los_Angeles`; Sonarr's scheduler is timezone-sensitive — keep them uniform.
- **File permissions:** `UMASK_SET=022` on qBittorrent; arr apps run PUID=0 so they can read/move qB downloads.
- **Network conflicts:** *arr apps use many ports. On the machine VM, only the API ports (8989/7878/8686/8787/9696) and gluetun's published 8080 + 6881 are host-published; netns-sharers (qB) publish none of their own.
- **Prowlarr API key rotation:** If rotated, update it in every arr app (`Applications` table rows carry the real keys).
- **qBittorrent WebUI password:** generated at first boot, not a default — persist it via the PBKDF2 conf recipe in [[qBittorrent]] before any restart.
- **Readarr stability:** abandoned upstream (retired May 2026); its qB download client is parked pending a successor image. Do not rely on it for mission-critical collections.

## Best Practices

1. Use tags to route content to specific download clients or categories.
2. Enable the Blocklist in arr apps to prevent re-downloading failed torrents.
3. Set download limits in qBittorrent to avoid bandwidth saturation.
4. Back up arr configs regularly (they are small SQLite DBs + JSON) — each lives at `/Volumes/COMPLETE/<svc>-data/config`.
5. Monitor Prowlarr indexer health — broken indexers hide new content.
6. Start with default quality profiles. Add custom formats gradually.

## See Also

- [[Sonarr]] · [[Radarr]] · [[Lidarr]] · [[Readarr]] · [[Prowlarr]] · [[qBittorrent]] — per-service pages
- [[Jellyfin]] — media server that consumes *arr downloads
- [[Copyparty]] — alternative file viewer