Require Limits and Requests

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: require-requests-limits
  annotations:
    policies.kyverno.io/title: Require Limits and Requests 
    policies.kyverno.io/category: Multi-Tenancy
    policies.kyverno.io/description: >-
      As application workloads share cluster resources, it is important to limit resources 
      requested and consumed by each pod. It is recommended to require 'resources.requests' 
      and 'resources.limits.memory' per pod. If a namespace level request or limit is specified, 
      defaults will automatically be applied to each pod based on the 'LimitRange' configuration.
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: "?*"