☑️ Ensure HPA has maximum replicas configured

When auto-scaling resource utilization is triggered by HPA (HorizontalPodAutoscaler), a range of acceptable values must be set to prevent unintended scaling-up scenarios.

Targeted objects by this rule (types of kind): Pod

Complexity: medium (What does this mean?)

Policy as code identifier: HPA_MISSING_MAXREPLICAS_KEY

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This rule will fail

If an HPA doesn't have maximum replicas configured

kind: HorizontalPodAutoscaler
spec:
  minReplicas: 1

Rule output in the CLI

$ datree test *.yaml

>> File: failExample.yaml
❌ Ensure HPA has maximum replicas configured [1 occurrence]
💡 Missing property object `maxReplicas` - the value should be within the accepted boundaries recommended by the organization

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How to fix this failure

kind: HorizontalPodAutoscaler
spec:
  minReplicas: 1
  maxReplicas: 10

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Read more

• Kubernetes docs - horizontal pod autoscale walkthrough