How do I enforce policy-as-code for HPA custom metrics using OPA and Conftest?

Implementing policy-as-code for Horizontal Pod Autoscaler (HPA) with custom metrics can be achieved using Open Policy Agent (OPA) and Conftest. This approach allows you to define and enforce policies that dictate how your HPA should behave based on custom metrics. The integration of OPA simplifies the management and enforcement of these policies, ensuring compliance and governance across your Kubernetes environment.

// Define an OPA Policy for HPA custom metrics package kubernetes.hpa default allow = false allow { input.kind == "HorizontalPodAutoscaler" input.spec.metrics[_].type == " Pods" // Restricting to Pods input.spec.minReplicas >= 1 input.spec.maxReplicas <= 10 }

policy-as-code OPA Conftest HPA custom metrics Kubernetes compliance governance

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