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All the services need to be in a running state. With Kubernetes, our ultimate aim is to deploy our application in the form of containers on a set of machines that are configured as worker nodes in a cluster. Kubernetes does not deploy containers directly on the worker nodes. The containers are encapsulated into a Kubernetes object known as pods. A pod is a single instance of an application. A pod is the smallest object that you can create in Kubernetes.

The Kubernetes architecture consists of a lot of different components working with each other, talking to each other in many different ways. So they all need to know where the other components are. There are different modes of authentication, authorization, encryption and security.