clustering-keycloak-on-k8s-keycloak-service.yml

apiVersion: v1
kind: Service
metadata:
  name: keycloak-service
  namespace: keycloak
spec:
  ports:
    - name: httpPort
      port: 8080
      targetPort: 8080
      protocol: TCP
    - name: infinispanPort
      port: 7800
      targetPort: 7800
      protocol: TCP
  selector:
    app: keycloak-deployment

Following your blog article to GH I found the service instead of the deployment manifest.