This is a mix of VMware VMs an AWS instances.  All CentOS 7.


On Tuesday, April 3, 2018 1:04 PM, Rob Crittenden <rcritten@redhat.com> wrote:


Andrew Meyer via FreeIPA-users wrote:

> I need some clarification on this.  I have my FreeIPA server in
> talking.  NTP is working.  However Some servers are getting ntp drift. 
> If I go into /etc/ntp.conf I see that at the bottom FreeIPA adds server
> at the bottom of the file.
>
> ### Added by IPA Installer ###
> server 127.127.1.0 iburst
> fudge 127.127.1.0 stratum 10
> server 1.2.3.4   # added by /sbin/dhclient-script
> server 5.6.7.8   # added by /sbin/dhclient-script
> server 9.0.1.2   # added by /sbin/dhclient-script
> server 3.4.5.6   # added by /sbin/dhclient-script
> [centos@freeipa03 ~]$
>
> But under the public servers at the top should I leave the the centos
> public ntp servers?  Should I add the FreeIPA servers?


The theory for making IPA an NTP server was that even if time was off on
the IPA master it would be sharing its same incorrect time with all its
clients so they would all be in the same time universe and things would
continue to work.

It wouldn't hurt if you re-ordered things (I think). Just keep an eye on
it for a while.

Is this real hardware or VMs? In the past (like many moons ago) one
particular VM tech was particularly bad at time keeping so extra work
was needed on the VM host to ensure its RTC was passed into the VMs.

I wonder if connectivity to the centos pool is a problem, or if a VM, it
has bad timing.

rob