Cattle vs Pets: How to Automate Legacy Infrastructure Without Rebuilding

The "cattle vs pets" analogy remains relevant in the context of brownfield automation, emphasizing the need to manage infrastructure based on function rather than identity. This shift from treating infrastructure like "pets," which are unique and individually managed, to "cattle," which are managed in bulk and by role, facilitates automation by providing a structured approach to infrastructure management. The transition requires implementing three key labels: role, type, and status, which help in organizing information and making the infrastructure automation-friendly without overhauling existing environments. This structured labeling system enables easier resource management and the development of automated processes, even in complex or outdated systems. By adopting a mindset that prioritizes function over individual identity, infrastructure teams can use a source of truth to maintain organized, dynamic data that supports efficient automation. The article suggests starting small, focusing on consistency, and using tools like Infrahub to apply this methodology without needing a complete system overhaul.