Files
spark-control/package/assets
Keysat 98988057a2 v0.18.0:1 - scrub owner-specific hostnames, ips, usernames, names from tracked files
Replace real cluster IPs/hosts/usernames and example names with neutral
placeholders across docs, ops notes, package install text, and the offline
redaction test; delete the obsolete build-time starter prompt. Closes the
portability audit's single blocker. No runtime behavior change.
2026-06-12 15:07:34 -05:00
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Spark Control

A browser-based control panel for a dual-DGX-Spark vLLM cluster on your LAN. See which LLM is loaded, swap to another with one click, and watch the streaming log until the new model is ready.

What you get on StartOS

After install you have:

  • A web UI at the package's LAN address (HTTPS, .local).
  • One-click model swaps for any model in your models.yaml catalog.
  • Live status of vLLM, Parakeet (STT), and Kokoro (TTS).

Getting set up

This package SSHes into your Spark server to run cluster commands, so it needs a one-time setup:

  1. Open Actions → Show Public Key. Copy the ed25519 public key that the package generated.
  2. SSH into each Spark and append the key to ~/.ssh/authorized_keys:
    echo "<paste-pubkey-here>" >> ~/.ssh/authorized_keys
    
  3. Open Actions → Configure Sparks. Enter the LAN hostnames or IPs for Spark 1 and Spark 2, plus the SSH username you log into each Spark with.
  4. Open the Web UI. It will hit each Spark to confirm. If both indicators are green you're done.

Using Spark Control

Once configured, open the web interface from your phone or laptop. The current model is shown in the top bar. Each available model has a card with a "Switch to this" button. Clicking it stops the current model and launches the new one — the log tails in real time until Application startup complete. appears (36 min depending on the model).

Editing the model catalog

The bundled catalog covers the models in the starter models.yaml. To add a model, ssh into the StartOS server and edit /embassy-data/package-data/volumes/spark-control/main/models.yaml, then restart the service. (A proper "Edit Model Catalog" action is on the roadmap.)

Source code

https://github.com/Start9Labs/... (TBD)