Azure Kubernetes Service

Kubernetes is an open-source container orchestration system for automating application deployment, scaling, and management

Open source. Public code base and community involvement in the product.
Orchestration. Keeps track of lots of parts of a system. Makes sure containers are configured correctly to work together.
Automatic application deployment. Kubernetes will deploy more images of containers as needed.
Automatic scaling. Automatic monitoring of application load to determine when to scale the number of containers used.

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