Forbid CPU Limits

 1apiVersion: kyverno.io/v1
 2kind: ClusterPolicy
 3metadata:
 4  name: forbid-cpu-limits
 5  annotations:
 6    policies.kyverno.io/title: Forbid CPU Limits
 7    policies.kyverno.io/category: Other
 8    policies.kyverno.io/subject: Pod
 9    kyverno.io/kyverno-version: 1.10.0
10    kyverno.io/kubernetes-version: "1.26"
11    policies.kyverno.io/description: >-
12      Setting of CPU limits is a debatable poor practice as it can result, when defined, in potentially starving
13      applications of much-needed CPU cycles even when they are available. Ensuring that CPU limits are not
14      set may ensure apps run more effectively. This policy forbids any container in a Pod from defining CPU limits.
15spec:
16  background: true
17  validationFailureAction: Enforce
18  rules:
19  - name: check-cpu-limits
20    match:
21      any:
22      - resources:
23          kinds:
24          - Pod
25    validate:
26      message: Containers may not define CPU limits.
27      pattern:
28        spec:
29          containers:
30          - (name): "*"
31            =(resources):
32              =(limits):
33                X(cpu): null