The example container files on RHCOS image layering documentation contain examples about firewalld and libreswan that are unsupported (it is fully unsupported to install firewalld and libreswan must only be installed as documented in the ipsec section, so it shouldn't be mentioned in this doc).

To be more concrete:

• 4.16-4.19: These versions just contain a mention to firewalld as an RPM that can be installed in their RHCOS image layering (a.k.a. Image mode for OpenShift) documentation. This reference to firewalld must be removed.
• 4.14 and 4.15 contain explicit firewalld and libreswan examples that must be removed.
  • They can be replaced by the rsyslog example used in 4.16+ versions (as long as we don't keep any reference to firewalld).

4.12 doesn't seem affected (and 4.13 is unsupported, so I didn't even check it)