A manifest file is a common name for any Kubernetes configuration file that defines the configuration of various Kubernetes components.

Here are some examples of manifest files in Kubernetes:

PodSpec file — contains Pod definitions

Deployment file — contains deployment definition or configurations

Network Policy file — contains network policies or rules

We can use one of the following formats to write a manifest file:

YAML

JSON

Generally, people prefer the YAML format as it is easy to write and read. 

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