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c52f07b615
* new samples; updates * typos * add policy to restrict LoadBalancer * correct sample numbering * fix typos
36 lines
1.3 KiB
Markdown
36 lines
1.3 KiB
Markdown
# Require labels
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Labels are a fundamental and important way to assign descriptive metadata to Kubernetes resources, especially Pods. Labels are especially important as the number of applications grow and are composed in different ways.
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This sample policy requires that the label `app.kubernetes.io/name` be defined on all Pods. If you wish to require that all Pods have multiple labels defined (as opposed to [any labels from an approved list](RequireCertainLabels.md)), this policy can be altered by adding more labels.
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## More Information
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* [Common labels](https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/)
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## Policy YAML
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[require_labels.yaml](best_practices/require_labels.yaml)
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```yaml
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apiVersion: kyverno.io/v1
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kind: ClusterPolicy
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metadata:
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name: require-labels
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spec:
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validationFailureAction: audit
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rules:
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- name: check-for-labels
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match:
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resources:
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kinds:
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- Pod
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validate:
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message: "The label `app.kubernetes.io/name` is required."
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pattern:
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metadata:
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labels:
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app.kubernetes.io/name: "?*"
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# You can add more labels if you wish the policy to validate more than just one is present. Uncomment the below line, or add new ones.
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#app.kubernetes.io/component: "?*
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```
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