---
okf: "0.1"
type: service
visibility: public
status: deprecated
updated: 2026-07-29
links: []
superseded_by: "hosts/chelsty-infra/runtime/mosquitto/ (chelsty) + host systemd mosquitto na PIHA; decyzja topologii MQTT otwarta"
---

# Mosquitto MQTT Broker — NOT DEPLOYED / LEGACY

> **Status (2026-07-28, truth cleanup):** this manifest matches **nothing that
> actually runs** (recon `docs/architecture/RECON-multiagent-2026-07-27.md`, C8).
> The broker on **vps** is part of the legacy ai-cluster stack (being
> decommissioned, see `docs/architecture/ai-cluster-LEGACY.md`); the broker on
> **piha** is a host systemd mosquitto (OS package) with no repo definition;
> **chelsty** has its own config under `hosts/chelsty-infra/runtime/mosquitto/`.
> Do not deploy from this directory. Kept until the MQTT topology decision
> (recon open question 7) is made.

Eclipse Mosquitto is an open source (EPL/EDL licensed) message broker that implements the MQTT protocol versions 5.0, 3.1.1 and 3.1.

Port 1883 for standard MQTT.
Port 9001 for WebSockets.