Exam essentials

Kubernetes

Kubernetes is the industry-standard orchestrator for containerised apps. It was initially developed at Google and is now an open-source project under active development on GitHub. It’s deployed as a cluster of control plane nodes and worker nodes that provide scheduling, self-healing, autoscaling, and more. Third-party projects have extended its capabilities to include orchestration of virtual machines, serverless functions, and much more.

Pods

Pods are the atomic unit of scheduling on Kubernetes. Developers write applications, package them as containers, and then wrap those containers in pods to run on Kubernetes. A Pod can wrap one or more containers, and all containers in a pod are guaranteed to be scheduled on the same node. The pod also acts as a shared execution environment for containers. This means two containers in the same pod have access to the same volumes and networking. If you want to scale an app, you add more pods.

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