oracle 19.10.0.0.0 rac,Red Hat Enterprise Linux release 8.3 (Ootpa)
[grid@rac02 ~] crsctl check ctss CRS-4700: The Cluster Time Synchronization Service is in Observer mode [grid@rac02 ~] cluvfy comp clocksync -n all

Verifying Clock Synchronization …
CTSS is in Observer state. Switching over to clock synchronization checks using NTP

Verifying Network Time Protocol (NTP) …
Verifying ‘/etc/ntp.conf’ …WARNING (PRVG-1019)
Verifying ‘/etc/chrony.conf’ …WARNING (PRVG-1019)
Verifying ‘/var/run/ntpd.pid’ …WARNING (PRVG-1019)
Verifying ‘/var/run/chronyd.pid’ …WARNING (PRVG-1019)
Verifying Daemon ‘ntpd’ …FAILED (PRVG-1024, PRVF-7590)
Verifying Daemon ‘chronyd’ …FAILED (PRVG-1024, PRVF-7590)
Verifying Network Time Protocol (NTP) …FAILED (PRVG-1019, PRVG-1024, PRVF-7590)
Verifying Clock Synchronization …FAILED (PRVG-1019, PRVG-1024, PRVF-7590)

Verification of Clock Synchronization across the cluster nodes was unsuccessful on all the specified nodes.

Failures were encountered during execution of CVU verification request “Clock Synchronization across the cluster nodes”.

Verifying Clock Synchronization …FAILED
Verifying Network Time Protocol (NTP) …FAILED
Verifying ‘/etc/ntp.conf’ …WARNING
PRVG-1019 : The NTP configuration file “/etc/ntp.conf” does not exist on
nodes “rac02,rac01”

Verifying '/etc/chrony.conf' ...WARNING
PRVG-1019 : The NTP configuration file "/etc/chrony.conf" does not exist on
nodes "rac02,rac01"

Verifying '/var/run/ntpd.pid' ...WARNING
PRVG-1019 : The NTP configuration file "/var/run/ntpd.pid" does not exist
on nodes "rac02,rac01"

Verifying '/var/run/chronyd.pid' ...WARNING
PRVG-1019 : The NTP configuration file "/var/run/chronyd.pid" does not
exist on nodes "rac02,rac01"

Verifying Daemon 'ntpd' ...FAILED
PRVG-1024 : The NTP daemon or Service was not running on any of the cluster
nodes.

rac02: PRVF-7590 : "ntpd" is not running on node "rac02"
rac02: Liveness check failed for "ntpd"

rac01: PRVF-7590 : "ntpd" is not running on node "rac01"
rac01: Liveness check failed for "ntpd"

Verifying Daemon 'chronyd' ...FAILED
PRVG-1024 : The NTP daemon or Service was not running on any of the cluster
nodes.

rac02: PRVF-7590 : "chronyd" is not running on node "rac02"
rac02: Liveness check failed for "chronyd"

rac01: PRVF-7590 : "chronyd" is not running on node "rac01"
rac01: Liveness check failed for "chronyd"

CVU operation performed: Clock Synchronization across the cluster nodes
Date: May 14, 2021 1:54:06 PM
CVU home: /u01/app/19.3.0/grid/
User: grid