Deployment, despite being an essential task, can be a confusing part of shipping an application. Depending on your stack, there could be a plethora of tools out there or… none at all. Unfortunately, Elixir falls into the latter bucket. Despite having a heart of gold, the language is still obscure, and that makes the process of deployment a tiny bit harder.
Addressing this problem may have been the reason for incorporating releases into version 1.9 of the language. Since the version bump, Elixir Releases have received the official blessing of the core language team. That means that deployment will finally be a piece of cake… right? There’s a caveat. While releases are meant to be self-contained executables, they still call out to native system libraries to do things like open TCP sockets and write to files. That means that the native libraries referenced at compile time need to be exactly the same as the ones on your target machine. Unless you can guarantee that your workstation and cloud are exactly the same, releases can seem like only half the promise of a stress-free deployment.