Labels are used to identify and optionally group objects in a Kubernetes cluster. Labels are also used in selector queries to provide flexible runtime grouping of objects such as pods. Annotations provide object-scoped key/value storage of metadata that can be used by automation tooling and client libraries. Annotations can also be used to hold configuration data for external tools such as third-party schedulers and monitoring tools. Labels and annotations are key to understanding how key components in a Kubernetes cluster work together to ensure the desired cluster state. Using labels and
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