Building Stateful Services with Kubernetes

The Kubernetes sweet-spot is running stateless microservices that can scale horizontally. By keeping state out of your application, Kubernetes can seamlessly add, remove, or restart pods to keep your service healthy and scalable. Developing a stateless application is, without question, the easiest way to ensure that your app can scale with Kubernetes. However, there are some workloads that do not run effectively in a stateless way, and for that, Kubernetes offers a few tools for developing stateful applications: leader election, StatefulSets and session affinity. [Read More]

A Guide to the Kubernetes Networking Model

Kubernetes was built to run distributed systems over a cluster of machines. The very nature of distributed systems makes networking a central and necessary component of Kubernetes deployment, and understanding the Kubernetes networking model will allow you to correctly run, monitor and troubleshoot your applications running on Kubernetes. Networking is a vast space with a lot of mature technologies. For people unfamiliar with the landscape, this can be uncomfortable because most people have existing preconceived notions about networking, and there are a lot of both new and old concepts to understand and fit together into a coherent whole. [Read More]