Conductarr

🎼 Priority-based download queue orchestrator for Radarr, Sonarr & SABnzbd — automatically manages and reorders your download queue across multiple priority tiers.

What it does

Conductarr sits between your *arr apps and SABnzbd and enforces a strict priority order on the download queue:

• Virtual queues — you define named tiers (e.g. user requests, upgrade queue, kometa) each with a priority number and tag-based matchers. Every SABnzbd job is assigned to the highest-matching tier.
• Automatic reordering — each poll cycle the SABnzbd queue is reordered so that higher-priority tiers always run first. Only one job downloads at a time; everything else is paused.
• Upgrade scanning — queues marked upgrade: enabled: true automatically search Radarr/Sonarr for candidates that don't yet satisfy your accept_conditions (e.g. missing a custom format or below a score threshold), grab a release, and track it through to completion. A rate-limited cursor ensures candidates are visited round-robin without hammering the APIs.
• Duplicate prevention — before grabbing a release Conductarr checks both the live SABnzbd queue and the database, so the same movie or episode is never downloaded twice concurrently.

Quick start (Docker Compose)

services:
  conductarr:
    image: ghcr.io/eulemitkeule/conductarr:latest
    container_name: conductarr
    restart: unless-stopped
    environment:
      PUID: 1000
      PGID: 1000
      UMASK: "022"
      TZ: UTC
      LOG_LEVEL: info
    volumes:
      - /path/to/conductarr/config:/config
    command: conductarr watch

Place a conductarr.yml inside the mounted config directory. A minimal example:

conductarr:
  poll_interval: 15.0

sabnzbd:
  url: http://sabnzbd:8080
  api_key: YOUR_KEY

radarr:
  url: http://radarr:7878
  api_key: YOUR_KEY

sonarr:
  url: http://sonarr:8989
  api_key: YOUR_KEY

queues:
  - name: user_requests
    priority: 100
    matchers:
      - type: tags
        tags: ["request"]

  - name: german_upgrade
    priority: 50
    matchers:
      - type: tags
        tags: ["upgrade-de"]
    upgrade:
      enabled: true
      sources: [radarr, sonarr]
      max_active: 2
      search_interval: 30.0
      accept_conditions:
        - type: custom_format
          name: German DL

  - name: other
    priority: 1
    fallback: true

Tag your Radarr/Sonarr items with the matching tags and Conductarr will automatically place them in the right tier.

Poll loop internals

Every poll_interval seconds the orchestrator runs a single cycle:

1. Read SABnzbd queue — fetch current slots (silently; no log noise when nothing changes).
2. Resolve identities — map each nzo_id to a virtual queue using an in-memory cache. On a cache miss, Radarr and Sonarr queues are fetched once for the whole cycle, not once per item.
3. Handle completions — jobs that disappeared from SABnzbd are marked complete in the database.
4. Reorder & enforce — slots are sorted by virtual-queue priority and switch() is called only when the order is actually wrong. The top slot is resumed; all other pausable slots are paused.
5. Fill upgrade slots — for each upgrade-enabled queue that has capacity, the next unprocessed candidate is fetched from the database, checked against live Radarr/Sonarr data, and if still eligible a release is grabbed and added to SABnzbd.