Kubernetes Labels and Annotations: Difference between revisions
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An annotation contains non-identifying information. The information exposed by annotations is not used internally by Kubernetes. They cannot be used in selectors. The annotation keys and values are not constrained. | |||
Revision as of 00:54, 7 September 2019
Internal
Labels
A label contains identifying information.
Labels are used by selector queries, or within selector sections of object definitions.
The structure of keys and values is constrained, so they can be evaluated quickly.
TODO: Label syntax and character set: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#syntax-and-character-set.
Annotations
An annotation contains non-identifying information. The information exposed by annotations is not used internally by Kubernetes. They cannot be used in selectors. The annotation keys and values are not constrained.