What is Kubernetes?
#46 · Level 3 · Modern architecture · ContainersConcept
Section titled “Concept”Kubernetes is a popular open-source manager for running and looking after many containers together. A Kubernetes cluster has two main parts — the control plane (which makes decisions) and nodes (the servers where containers run). The smallest unit Kubernetes runs is called a pod, which holds one or more containers. You write down the state you want, and Kubernetes tries to keep things in that state. It is not an AWS service of its own; for running managed Kubernetes on AWS there is Amazon EKS.
Simple example
Section titled “Simple example”Many cooks (containers) work in a big restaurant. A manager (Kubernetes) decides who does which job. If someone falls sick, the manager brings in someone new, and when it gets busy, calls in more cooks.
Why it’s needed
Section titled “Why it’s needed”A few containers can be run by hand. But with hundreds of containers you need a “manager” that handles everything on its own. Kubernetes runs the same way on every cloud.
Where it’s used
Section titled “Where it’s used”Large systems built from many small services (microservices).
Key terms
Section titled “Key terms”| English | Simple meaning |
|---|---|
| Pod | The smallest unit that runs in Kubernetes — one or more containers |
| Node | The server a pod runs on |
| Cluster | The whole group of nodes together |
Azure equivalent
Section titled “Azure equivalent”Azure Kubernetes Service (AKS)
Related
Section titled “Related”What is a Container? · Amazon EKS · Amazon ECS
Learn more
Section titled “Learn more”For details and the latest information, see the official documentation: