Integrating Elixir with a Go Backend Using CNodes

In this article, the author explains how they combined an Elixir Phoenix LiveView application with an existing Go backend at Mozi. The need arose to leverage their Go services without rewriting or duplicating code. The traditional methods of using Native Implemented Functions (NIFs) presented challenges such as risking stability within the BEAM environment and complicating builds. Ports provided a better segregation but still posed some overhead. The chosen solution involved implementing a C Node, allowing for a clean separation between Elixir and Go code while utilizing the Erlang distribution protocol. The initial C wrapper for the Go code was later rewritten in Crystal, resulting in enhanced maintainability and streamlined development. This integration proved effective, allowing both languages to coexist in the same deployed Kubernetes environment while maintaining their independent builds.