Comment 3 for bug 1818137

A potential workaround is mentioned here: https://github.com/upmc-enterprises/elasticsearch-operator/issues/139#issuecomment-414067572

> I had to use the following command to overcome the issue: kubectl set image ds elasticsearch-operator-sysctl sysctl-conf=privaterepo/busybox:latest && kubectl get po -l k8s-app=elasticsearch-operator -o name | cut -d"/" -f2 | while read p;do kubectl delete po $p;sleep 5;done