Description of problem:

One of our IBM CloudPack customers seems to be hitting the same issue which was fixed here https://bugzilla.redhat.com/show_bug.cgi?id=1820778

-<>-
Description:*  kube-proxy was working completely fine, but after the
upgrade from CE 2.6.2 to CE 3.2 it keeps restarting. It sounds like the
kube-proxy keeps dying complaining liveness/readiness probe is failing.
-<>-


Version-Release number of selected component (if applicable):

OCP 4.3.29 (Calico)


Actual results:
openshift-kube-proxy pods enter crashloop backoff 

Expected results:
openshift-kube-proxy pods run as normal and should not fail on healthchecks.

Additional info:

Below are the warnings collected from the pods which is why I think we might be hitting the same BZ again.

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2020-09-01T10:31:32.37026376Z W0901 10:31:32.369966       1 proxier.go:584] Failed to read file /lib/modules/4.18.0-147.20.1.el8_1.x86_64/modules.builtin with error open /lib/modules/4.18.0-147.20.1.el8_1.x86_64/modules.builtin: no such file or directory. You can ignore this message when kube-proxy is running inside container without mounting /lib/modules

2020-09-01T10:31:32.584849247Z W0901 10:31:32.584805       1 proxier.go:597] Failed to load kernel module ip_vs with modprobe. You can ignore this message when kube-proxy is running inside container without mounting /lib/modules
2020-09-01T10:31:32.587739958Z W0901 10:31:32.587730       1 proxier.go:597] Failed to load kernel module nf_conntrack_ipv4 with modprobe. You can ignore this message when kube-proxy is running inside container without mounting /lib/modules
~~~~


I've also come across this error in most of the kube-proxy pods. For this, I think we should also consider checking BZ https://bugzilla.redhat.com/show_bug.cgi?id=1843646.
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2020-09-17T09:09:48.91469971Z E0917 09:09:48.914578       1 proxier.go:1449] Failed to execute iptables-restore: exit status 4 (iptables-restore v1.8.4 (nf_tables):
2020-09-17T09:09:48.91469971Z line 27016: CHAIN_USER_DEL failed (Device or resource busy): chain KUBE-SEP-4VGFJQBLLXV6WZYJ
~~~~