Perform these steps on the controller node.
Install the packages:
# yum install chrony
Edit the /etc/chrony.conf
file and add, change, or remove these
keys as necessary for your environment:
server NTP_SERVER iburst
Replace NTP_SERVER
with the hostname or IP address of a suitable more
accurate (lower stratum) NTP server. The configuration supports multiple
server
keys.
Note
By default, the controller node synchronizes the time via a pool of public servers. However, you can optionally configure alternative servers such as those provided by your organization.
To enable other nodes to connect to the chrony daemon on the controller node,
add this key to the /etc/chrony.conf
file:
allow 10.0.0.0/24
If necessary, replace 10.0.0.0/24
with a description of your subnet.
Start the NTP service and configure it to start when the system boots:
# systemctl enable chronyd.service
# systemctl start chronyd.service
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