Kubernetes Custom Resource Definitions (CRDs) What are Kubernetes CRDs? Tutorial: Extending Kubernetes with Custom Resource Definitions (CRDs) Challenges with Kubernetes CRDs in a Multi-tenant Environment

Containerization is on an upward trajectory when it comes to enterprise adoption. This is primarily due to how containers solve the problem of application delivery and portability.

The idea of virtual Kubernetes clusters (vClusters) is to spin up a fully-functional cluster within another Kubernetes clusters to provide an efficient abstraction and direct Kubernetes access on top of a shared underlying cluster.

Using sandbox environments is very common for software developers because it allows them to work, test, and experiment in an environment that is isolated from the production system but still provides a realistic experience.

Artificial Intelligence (AI) and Machine Learning (ML) have been some of the hottest IT topics in recent years. A recent O’Reilly survey discovered that 85% of companies are already using AI or are evaluating it.

The container orchestration technology Kubernetes has become the dominant solution for cloud infrastructure and as such it is maturing at an unrivaled pace. Many companies have already adopted Kubernetes or are in the process of it.

Kubernetes has matured so much recently that it even expanded beyond its original space as operations technology. So, also at least 1.7 million developers are already using Kubernetes as “The State of Cloud Native Development” by the CNCF stated for Q2 2019.

The use of virtual clusters (vClusters) in Kubernetes, i.e. running virtual clusters inside of physical clusters, has the potential to disrupt the use of Kubernetes in a variety of settings, from cloud-native development to machine learning experiments.

Virtual Kubernetes Clusters (vClusters) have the potential to bring Kubernetes adoption to the next level. They are running in a physical Kubernetes cluster and can be used in the same way as normal clusters, but still are just a virtual construct.