Memory Requests Equal Limits

 1apiVersion: kyverno.io/v1
 2kind: ClusterPolicy
 3metadata:
 4  name: memory-requests-equal-limits
 5  annotations:
 6    policies.kyverno.io/title: Memory Requests Equal Limits
 7    policies.kyverno.io/category: Sample
 8    policies.kyverno.io/severity: medium
 9    policies.kyverno.io/subject: Pod
10    policies.kyverno.io/minversion: 1.6.0
11    policies.kyverno.io/description: >-
12      Pods which have memory limits equal to requests could be given a QoS class of Guaranteed if
13      they also set CPU limits equal to requests. Guaranteed is the highest schedulable class. 
14      This policy checks that all containers in a given Pod have memory requests equal to limits.
15spec:
16  validationFailureAction: Audit
17  background: false
18  rules:
19  - name: memory-requests-equal-limits
20    match:
21      any:
22      - resources:
23          kinds:
24          - Pod
25    validate:
26      message: "resources.requests.memory must be equal to resources.limits.memory"
27      deny:
28        conditions:
29          any:
30          - key: "{{ request.object.spec.containers[?resources.requests.memory!=resources.limits.memory] | length(@) }}"
31            operator: NotEquals
32            value: 0