Description of problem:
With Openshift 4.4 and onward release, Machine Config Operator supports switching from traditional to realtime kernel on RHCOS node. kernel switch can be performed via MachineConfig during a new cluster launch (as day 1) or on a running cluster (as day 2). It will be good to have steps documented in installer repo documentation which would work as a reference for needed users.
Version-Release number of the following components:
Installer master repo doc section https://github.com/openshift/installer/blob/master/docs/user/customization.md
Upstream patch - https://github.com/openshift/installer/pull/2992
Needed doc is already at https://github.com/openshift/installer/blob/master/docs/user/customization.md
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.