class-p.yaml

# Class P
affinity:
  podAntiAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      - topologyKey: "kubernetes.io/hostname"
        namespaces: ["default"]
        labelSelector:
          matchExpressions:
          - key: non-existing-key
            operator: DoesNotExist

class-pg.yaml

# Class PG
affinity:
  podAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      - topologyKey: "kubernetes.io/hostname"
        labelSelector:
          matchLabels:
            class-pg-group-1: foobar
  podAntiAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      - topologyKey: "kubernetes.io/hostname"
        labelSelector:
          matchExpressions:
          - key: class-pg-group-1
            operator: DoesNotExist