As is the case with all new technology, container cluster deployments began small. There were some companies, Google for example, that were deploying sizable clusters, but these were not the norm. Instead, there were some test beds and small, greenfield applications. As the technology proved itself and matured, more organizations adopted containers and the market favorite container orchestrator, Kubernetes. The emergence of Kubernetes was, in fact, a leading indicator that containers were starting to see more widespread adoption in real applications. The more containers deployed, the greater the need for software to automate their lifecycle. Even so, it was unusual...
