policies/opa/gatekeeper/node-selector/mutate/4-toleration-pod.yaml

# Adds a toleration to all pods in a specific namespace
apiVersion: mutations.gatekeeper.sh/v1alpha1
kind: Assign
metadata:
  name: mutator-add-toleration-pod
  annotations:
    aws-eks-best-practices/description: >-
      Adds toleration - https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/
spec:
  applyTo:
  - groups: [""]
    kinds: ["Pod"]
    versions: ["v1"]
  match:
    namespaces: ["tenants-x"]
  location: "spec.tolerations"
  parameters:
    assign:
      value: 
      - key: "tenant"
        operator: "Equal"
        value: "tenants-x"
        effect: "NoSchedule"