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37 lines
923 B
Markdown
37 lines
923 B
Markdown
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# Disallow use of default namespace
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Namespaces are a way to segment and isolate cluster resources across multiple users. When multiple users or teams are sharing a single cluster, it is recommended to isolate different workloads and restrict use of the default namespace.
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## Policy YAML
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[disallow_default_namespace.yaml](best_practices/disallow_default_namespace.yaml)
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````yaml
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apiVersion: kyverno.io/v1alpha1
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kind: ClusterPolicy
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metadata:
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name: validate-namespace
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spec:
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rules:
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- name: check-default-namespace
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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: "Using 'default' namespace is restricted"
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pattern:
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metadata:
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namespace: "!default"
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- name: check-namespace-exist
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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: "A namespace is required"
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pattern:
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metadata:
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namespace: "?*"
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````
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