kyverno/samples/RequirePodRequestsLimits.md

# Require pod resource requests and limits

Application workloads share cluster resources. Hence, it is important to manage resources assigned for each pod.  It is recommended that `resources.requests` and `resources.limits` are configured per pod and include CPU and memory resources. Other resources such as, GPUs, may also be specified as needed. 

If a namespace level request or limit is specified, defaults will automatically be applied to each pod based on the `LimitRange` configuration. 

## Policy YAML 

[require_pod_requests_limits.yaml](best_practices/require_pod_requests_limits.yaml)

````yaml
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: require-pod-requests-limits
spec:
  validationFailureAction: "audit"
  rules:
  - name: validate-resources
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "CPU and memory resource requests and limits are required"
      pattern:
        spec:
          containers:
          - resources:
              requests:
                memory: "?*"
                cpu: "?*"
              limits:
                memory: "?*"
                cpu: "?*"
````