topic Re: Dynatrace cluster nodes clock out of sync in Dynatrace Managed Q&A

Dynatrace cluster nodes clock out of sync

dtdeer — Thu, 11 May 2023 06:51:22 GMT

I go the warning like "Server time of server1 is out of symnc. ... Please enable NTP on all cluster nodes." According to this post, https://community.dynatrace.com/t5/Open-Q-A/time-sync/m-p/112956/highlight/true#M8618, "It's important to have NTP setup correctly on those hosts. Otherwise OneAgents will be synced with the wrong time and will produce PurePaths that might be off (in the future)."

But how do I set up NTP? I thought NTP comes with Casssandra. I checked NTP service on cluster nodes and it appeared as not installed.

++
$ nptstat
bash: nptstat: command not found...
$ systemctl status ntpd
Unit ntpd.service could not be found.
++

Any suggestions?

Re: Dynatrace cluster nodes clock out of sync

y_buccellato — Thu, 11 May 2023 10:50:35 GMT

NTP doesn't depend on Dynatrace itself.

You or the Admin of the system that you are working on should set up NTP on Virtual Machine itself and the configuration of the NTP should reference a central NTP serves that keeps track of the current time.

You should definitely speak with one of your Org. Admins and he'll probably have the solution for you

Re: Dynatrace cluster nodes clock out of sync

dtdeer — Thu, 11 May 2023 17:50:18 GMT

y_buccellato,

Thanks for the quick response. I have two more questions:

1. Should I set up NTP service on ActiveGate nodes too?

2. Between ntpd and chronyd, which one works better with Dynatrace, or which one is a better choice generally?

Regards,

Re: Dynatrace cluster nodes clock out of sync

Julius_Loman — Sun, 14 May 2023 18:43:16 GMT

Not necessarily, but I highly recommend having NTP on each host. Even hosts not related to Dynatrace.
Both will work fine, probably Chrony would be a preferred choice in recent Linux distributions.

Re: Dynatrace cluster nodes clock out of sync

dtdeer — Tue, 16 May 2023 03:38:50 GMT

Julius_Loman,

Thank you. I made sure chronyd running on all cluster hosts and activegates.

Regards

Re: Dynatrace cluster nodes clock out of sync

elsplunko — Mon, 14 Aug 2023 12:43:32 GMT

In this regard it would be nice to implement an option besides /etc/ntp.conf to also choose /etc/chrony.conf or in this regard any other path?

Is there already something planned as chrony is the new standard 🙂

Re: Dynatrace cluster nodes clock out of sync

dtdeer — Mon, 14 Aug 2023 17:28:03 GMT

As far as I know, Chrony is the default NTP for Oracle Linux. Chrony is also the standard NTP used by my organization.