question NTPD, CDH7.1.8 KUDU, RHEL8.4 - inconsistency in Support Questions

NTPD, CDH7.1.8 KUDU, RHEL8.4 - inconsistency

Juanes — Tue, 21 Apr 2026 06:41:01 GMT

Hello Community,

I would like to rise a big inconsistency about requirements.

Starting by the Cloudera Support Matrix that says:

CDP Private Cloud Base7.1.8 > will need Cloudera Manager 7.7.1 and OS: RHEL8.4 will work.

Now, regarding to NTP, based on teh OS:
"In RHEL 8, the NTP protocol is implemented only by the chronyd daemon, provided by the chrony package. The ntp daemon is no longer available. If you used ntp on your RHEL 7 system, you might need to migrate to chrony"

in the other hand:
https://docs.cloudera.com/cdp-private-cloud-base/7.1.8/kudu-management/topics/kudu-server-management-limitations.html

"Kudu releases have only been tested with NTP. Other time synchronization providers such as Chrony may not work."

Could someone from Kudu team give some consistency here? RHEL8 not having ntpd anymore but mandatory for KUDU...
Please help.

Re: NTPD, CDH7.1.8 KUDU, RHEL8.4 - inconsistency

ShankerSharma — Wed, 05 Jun 2024 19:03:36 GMT

Hello,

You can use chrony.

If using chronyd for time synchronization at Kudu nodes, the rtcsync option
must be enabled in chrony.conf. Without rtcsync, the local machine's clock
will always be reported as unsynchronized and Kudu masters and tablet servers
will not be able to start.

Hope this helps.

Re: NTPD, CDH7.1.8 KUDU, RHEL8.4 - inconsistency

akshay0103 — Mon, 23 Sep 2024 16:20:21 GMT

Hi @ShankerSharma ,

What if i have mix of server on my cluster . Rhel 7 + Rhel8.
Which service should I be running on these servers( I assume ntpd and chronyd both are there for rhel7 but we only have chronyd with rhel8) and with what configuration to keep kudu running?.
Does it mean having chronyd running on all the servers (rhel7 + rhel8) of the cluster with rtcsync option enabled in chrony.conf?
Or on a cluster we can have a mix, that is, we can have ntpd on Rhel7 servers and chronyd on Rhel8 servers?
We are having a setup where we are going to add RHel8 nodes to the cluster which is already running on Rhel7 servers.

Regards
Akshay