Distributed Erlang
Learn how distributed Erlang establishes and manages node connections using TCP and cookies, the role of EPMD, and important security guidelines. Understand port configurations, node communication, and techniques to secure Erlang clusters for reliable Elixir deployments.
We'll cover the following...
How distributed Erlang works?
In one of the previous chapters, Distributed Elixir, we discussed distribution from a development and architectural perspective. This time, we will explore it under the operations view, directly tied to the Erlang runtime.
Let’s start with a quick summary.
Distributed Erlang works by establishing TCP connections between nodes. Nodes can only successfully establish connections if they share the same cookie. When distributed Erlang starts, it can automatically create a cookie, but we strongly advise teams to generate their own cookies. Once connected, nodes form a fully meshed network, where each node can communicate with all others. By default, the runtime does not encrypt the connection but can be ...