kubectl port-forward svc/seldon-core-analytics-grafana -n seldon-system 8090:80
curl -X POST http://$NODE_IP:$NODE_PORT/seldon/seldon-deploy/sklearn/api/v1.0/predictions \
-H 'Content-Type: application/json' \
-d '{ "data": { "ndarray": [[1,2,3,4]] } }'