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51 lines
1.3 KiB
Markdown
51 lines
1.3 KiB
Markdown
# Mutate pods with `emptyDir` and `hostPath` with `safe-to-evict`
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The Kubernetes cluster autoscaler does not evict pods that use `hostPath` or `emptyDir` volumes. To allow eviction of these pods, the following annotation must be added to the pods:
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````yaml
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cluster-autoscaler.kubernetes.io/safe-to-evict: true
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````
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This policy matches and mutates pods with `emptyDir` and `hostPath` volumes, to add the `safe-to-evict` annotation if it is not specified.
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## Policy YAML
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[add_safe_to_evict_annotation.yaml](best_practices/add_safe_to_evict.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: "add-safe-to-evict"
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spec:
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rules:
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- name: "annotate-empty-dir"
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match:
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resources:
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kinds:
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- "Pod"
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mutate:
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overlay:
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metadata:
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annotations:
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+(cluster-autoscaler.kubernetes.io/safe-to-evict): true
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spec:
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volumes:
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- (emptyDir): {}
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- name: "annotate-host-path"
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match:
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resources:
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kinds:
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- "Pod"
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mutate:
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overlay:
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metadata:
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annotations:
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+(cluster-autoscaler.kubernetes.io/safe-to-evict): true
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spec:
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volumes:
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- (hostPath):
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path: "*"
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````
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