[ale] NTP/Chrony time zone persistence

Jeremy T. Bouse jeremy.bouse at undergrid.net
Thu Sep 15 14:28:43 EDT 2016


I know older versions of SUSE on ESX 5.x have issues with time sync and
I believe it's kernel related as I recall.

We've got RHEL and CentOS < 7 (5 & 6) running in ESX 5.x without this
type of time issue.

Another thing to consider is the actually BIOS and ESX time/timezone
settings. Is the BIOS in UTC or localtime? Same with the ESX server
itself. Does this differ from the CentOS guest VM? It could be that the
systems don't match in what they believe the hwclock time is set to and
are treating it incorrectly on startup when the OS will look at the
hwclock to get the initial time and set it.

On 9/15/2016 12:25 PM, Jim Kinney wrote:
> This was ages ago. pre esx6
>
> I'm not running esx except as legacy. All VM hosting is Ovirt so I
> can't test 
>
> On Thu, 2016-09-15 at 12:09 -0400, Jeremy T. Bouse wrote:
>> On 9/15/2016 11:51 AM, Jim Kinney wrote:
>>> vague memory of vmware bug not passing the timezone on a time
>>> request to virtual hardware clock. Only solution was a start up
>>> script that sets TZ on boot then does a time sync to an external
>>> source. Did not affect windows VMs but played hell on Linux VMs that
>>> expected the hwclock to send good data. 
>>
>> If this is the case then it is either specific to CentOS 7 because I'm
>> running ESXi 6 with a dozen Ubuntu 14.04/16.04 and Debian 7/8/testing
>> VMs and not a one has a problem holding time or it's timezone.
>>
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> -- 
> James P. Kinney III
>
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> - Speech 11/23/1900 Mark Twain
>
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>
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