Tutorials

End-to-end walkthroughs. Each tutorial builds something real; you should be able to follow it from a clean checkout and end up with a running example.

In this section

• Hello, cluster — the minimal two-node walkthrough. If you have not done Getting started yet, do that first; this tutorial assumes a working cluster.
• Create an application — build a minimal OTP app from scratch: a worker that registers a service and an API that discovers and calls it on any node. Runnable source under examples/quickstart.
• Distributed chat — a small chat application that uses the service registry, service events, and gen_server patterns over the barrel_p2p dist channel. The full source is under examples/chat.

After the tutorials

• Concepts explains why each piece works the way it does.
• How-to guides cover the operational side: production, observability, troubleshooting.
• Reference is the API surface and the configuration list.