After merging #10048, the new way of installing Docker is conflicting with the pre-installed Docker in the kope.io images.
https://prow.k8s.io/view/gcs/kubernetes-jenkins/logs/e2e-kops-aws-k8s-1-15/1320685447990480896

A similar problem existed in 1.17 and was fixed in kubernetes-sigs/image-builder#273, by just copying the Docker deb files to /var/cache/nodeup/packages and letting kOps install them if the hash matches.

All kope.io images from 1.11 to 1.16, maybe also 1.17.