Getting Started¶

This walks you from a fresh checkout to a message routed end-to-end through switchyardd. The quickest path — an MQTT loopback — needs only the Rust toolchain and a local broker; the protocol plugins add a Python virtualenv.

Prerequisites¶

Component	Needed for	Notes
Rust toolchain (`cargo`)	`switchyardd`, `switchyardctl`, the MQTT plugin	Build with `-j2` to bound parallelism.
`mosquitto` (or Docker)	the MQTT quick-start and the live-test harness	`mosquitto` + `mosquitto-clients`, or an `eclipse-mosquitto:2` container.
Python 3.12 virtualenv	the Python plugins (LXMF, Signal, Meshtastic, MeshCore, Nostr, Bitchat)	One `.venv`; install each plugin's `requirements.txt` as needed.

License

RelayFabric is Apache-2.0, and every dependency is chosen under a permissive-only policy — no AGPL or other copyleft. This drives some plugin design choices (see Plugins).

Build¶

cargo build -j2 --release

Binaries land in target/release/. The rest of this guide assumes it is on your PATH.

The Python plugin virtualenv¶

The Rust MQTT plugin needs no runtime deps, but the Python plugins do. Create one virtualenv and install what a given plugin needs:

python3 -m venv .venv
.venv/bin/pip install -r plugins/lxmf/requirements.txt   # e.g. for the LXMF plugin

A plugin's command in the config points at .venv/bin/python … — see Configuration.

First route: MQTT loopback¶

Validate the shipped example config (adjust node.data_dir first):

switchyardd --config docs/relayfabric.example.yaml --check-config

Run a broker, the daemon, and a subscriber, then publish:
```
mosquitto -p 1883 &
switchyardd --config docs/relayfabric.example.yaml &
mosquitto_sub -t chat/b &
mosquitto_pub -t chat/a -m "ping"
```
The message published on chat/a is routed through switchyardd and delivered on chat/b (and vice versa) per the example config's demo route.

No echo loops

The MQTT plugin sets MQTT v5 No Local on its subscriptions, so the broker never echoes a plugin's own publishes back to it.

Inspect the running daemon¶

switchyardctl talks to the admin API over the Unix socket under node.data_dir:

switchyardctl status              # node id, connected plugins, queue summary
switchyardctl plugins             # advertised capabilities per plugin
switchyardctl routes              # configured routes
switchyardctl queue               # pending / dead-lettered deliveries
switchyardctl trace <message-id>  # a message's per-destination delivery state

See Operations for the full admin surface (metrics, config hot-reload, the Swagger UI at /docs).

Going further¶

Add a real network. Enable a plugin in your config and add a route to it — see Plugins and Configuration.
Test against real hardware/networks. The livetest/ kit is a copy-paste runbook for MQTT, then LXMF over Reticulum, then Signal, then real Meshtastic — see Live & Field Testing.
Understand the model. Architecture explains the daemon, plugins, and the message envelope; Routing & Policy covers dedup, TTL, retry, and the dead-letter queue.