[Bug 1046469] docker privileged mode with cmd /sbin/init - agetty & high cpu

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1046469

--- Comment #11 from Joe Mario  ---
Here's one workaround for this.  Sharing what I've learned.

Adding the following to the docker file

rm -f /lib/systemd/system/systemd*udev* ; \
   rm -f /lib/systemd/system/getty.target;

causes both the runnaway agetty and the spike in systemd-udevd processes to go
away.  I understand there is no need for udev or getty in containers.

I did also try:
   RUN systemctl disable getty.target
   RUN systemctl disable systemd-udevd.service

and although the Dockerfile built fine, all the getty and udev services were
still running as they were previously.  So those two "systemctl disable" appear
to be no-ops.  Perhaps they get run before /sbin/init (systemd) is invoked.