[ale] NTP/Chrony time zone persistence

Derek Atkins derek at ihtfp.com
Thu Sep 15 14:32:35 EDT 2016


Jeremy,

I highly doubt that's the case here.
The time isn't a mere hours apart.  They are MONTHS apart.
The hwclock says September 14; the system comes up in December.
That's not a timezone issue or mismatch.
That's pure failure.

-derek

On Thu, September 15, 2016 2:28 pm, Jeremy T. Bouse wrote:
> 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
>>
>> Every time you stop a school, you will have to build a jail. What you
>> gain at one end you lose at the other. It's like feeding a dog on his
>> own tail. It won't fatten the dog.
>> - Speech 11/23/1900 Mark Twain
>>
>> http://heretothereideas.blogspot.com/
>>
>>
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-- 
       Derek Atkins                 617-623-3745
       derek at ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant



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