Verified this on 4.4.0-0.nightly-2020-07-04-120349,
fluentd pods starts just with the below configuration as expected.
$ oc get pods -n openshift-logging
NAME READY STATUS RESTARTS AGE
cluster-logging-operator-7f9c8d494b-bmw8m 1/1 Running 0 3m
fluentd-2pgt7 1/1 Running 0 2m9s
fluentd-h78b8 1/1 Running 0 2m8s
fluentd-m4fzh 1/1 Running 0 2m8s
fluentd-mt7ch 1/1 Running 0 2m8s
fluentd-n2xh2 1/1 Running 0 2m9s
fluentd-wsn2z 1/1 Running 0 2m9s
Moving this bug to verified state.
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.