Deployed istio 1.1.0 RC with helm chart (not template)

I would like to drain out a specific node because it needs a reboot.
The PODs

Annotations:        scheduler.alpha.kubernetes.io/critical-pod:

prevents that.

error when evicting pod "istio-policy-d48655744-s8ggt" (will retry after 5s): Cannot evict pod as it would violate the pod's disruption budget.

(also note that annotation scheduler.alpha.kubernetes.io/critical-pod is deprecated and will be removed in k8s 1.14!)