🔗 Cluster singleton pattern

The challenge of safely running a single instance of a process in a distributed Elixir cluster can lead to frustrating failures. In her latest article, Johanna Larsson shares insights into the cluster singleton pattern and how to manage globally unique processes using GenServer and the :global name. She recounts experiences from her startup days, involving Kubernetes rolling deployments, where nodes inadvertently caused each other to shut down due to a misconfigured Swoosh email adapter. As a solution, she introduces a SingletonManager pattern that prevents cascading failures by managing process restarts without global linking. This article is a must-read for Elixir developers navigating cluster complexities.