policy-check-certexpiration.yaml

# openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -days 1 -nodes -subj "/C=XX/ST=StateName/L=CityName/O=CompanyName/OU=CompanySectionName/CN=CommonNameOrHostname"

# oc create secret tls expcert --cert=cert.pem --key=key.pem

apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
  name: policy-flag-expiring-certificate
  namespace: openshift-acm-policies
  annotations:
    policy.open-cluster-management.io/categories: AC Access Control, SC System and Communications Protection
    policy.open-cluster-management.io/standards: NIST SP 800-53
    policy.open-cluster-management.io/controls: AC-3 Access Enforcement, SC-8 Transmission Confidentiality and Integrity
spec:
  disabled: false
  remediationAction: inform
  policy-templates:
    - objectDefinition:
        apiVersion: policy.open-cluster-management.io/v1
        kind: CertificatePolicy
        metadata:
          name: policy-certificate
        spec:
          namespaceSelector:
            include:
              - "*"
          remediationAction: inform
          severity: medium
          minimumDuration: 300h