Kubernetes

Kubernetes is an open-source platform developed by Google for automating the deployment, scaling, and operational management of containerized applications. It acts as an orchestrator, allowing developers to manage complex microservices architectures across massive clusters of machines. This eliminates the need to manually handle thousands of individual Docker containers in a production environment.

Yes, the core upstream project of Kubernetes is completely open-source and free to use under the Apache 2.0 license. However, most businesses choose to pay for managed Kubernetes services provided by major cloud providers like Amazon EKS, Google GKE, or Microsoft AKS. These managed services charge a fee to handle the complex infrastructure maintenance, networking, and security patching.

Docker is an engine used to build, create, and run individual software containers, while Kubernetes is a system used to manage and orchestrate those containers at scale. You typically use Docker to package your application and its dependencies, and then use Kubernetes to deploy, network, and scale thousands of those Docker containers across a server cluster. They work together rather than serving as direct competitors.

Google originally developed an internal container orchestration system called Borg, which heavily inspired the public release of Kubernetes in 2014. The technology was open-sourced and subsequently donated to the Cloud Native Computing Foundation (CNCF). By the mid-2020s, it had become the undisputed industry standard for cloud infrastructure management globally.