Created attachment 1145310 [details]
Dockerfile triggering the issue

If I build the attached dockerfile, Docker fails with:

Step 5 : RUN chmod a+rx /hyperkube
 ---> Running in 672c655a7194
Container command not found or does not exist.

If I run the same job again, it fails in an identical way but this time leaves a namespaced version of /proc mounted on top of the host /proc. Since /proc/self no longer links to anything, everything is broken. Removing --exec-opt native.cgroupdriver=systemd from the systemd unit file results in things working as expected.

hyperkube is simply a go binary built as part of the kubernetes build - I don't think there's anything special about it.