Jenkins does not scale. There's no denying it. If we need more power because the number of concurrent builds increased, we cannot scale Jenkins. We cannot hook it into Kubernetes HorizontalPodAutoscaler to change the number of replicas based on metrics like the number of concurrent builds.. At times, Jenkins is struggling under heavy load. At others, it is wasting resources when it is underutilized. As a result, we might need to increase its requested memory and CPU as well as its limits to cover the worst-case scenario.
Viktor Farcic, Developer Advocate, CloudBees
Viktor Farcic is a Developer Advocate at CloudBees, a member of the Google Developer Experts and Docker Captains groups, and published author. His big passions are DevOps, Microservices, Continuous Integration, Delivery and Deployment (CI/CD) and Test-Driven Development (TDD). He often speaks at community gatherings and conferences. He published The DevOps Toolkit Series and Test-Driven Java Development. His random thoughts and tutorials can be found in his blog TechnologyConversations.com.