[Arm-dev]  Re:  Re: System time

Tue Sep 1 17:38:04 UTC 2015
Robert Moskowitz <rgm at htt-consult.com>

Again, this requires the network to be up?

I use timedatectl to set my timezone, will look more into it.  Could be 
all is rolled together...

On 09/01/2015 01:35 PM, Nicolas Repentin wrote:
>
> Don't know.. I saw this on the web
>
>
> Centos 7 use systemd. I suggest you use it.
>
> Use the command timedatectl 
> <http://www.freedesktop.org/software/systemd/man/timedatectl.html>
>
> Enable network time synchronization:
>
> timedatectl set-ntp True
>
>
>
>
> Create a conf file:
>
> vi /etc/systemd/timesyncd.conf
>
>
>
>
> with content like this:
>
> [Time]
>
> NTP= yourserver.org
>
>
>
>
> Start systemd-timedated service:
>
> systemctl start systemd-timedated
>
>
>
>
>
>
> Nicolas Repentin
>
> <nicolas at shivaserv.fr>
>
> --------- Original Message ---------
> *From*: Robert Moskowitz
> *To*: Conversations around CentOS on ARM hardware
> *Date*: Tue Sep 01 19:26:49 GMT+02:00 2015
> *Subject*: Re: [Arm-dev] Re: System time
>
>
> On 09/01/2015 01:15 PM, Nicolas Repentin wrote:
>>
>>
>> Oh, I did know about systemd-timesyncd, need to check about it :-)
>>
>
> Can't find it in the repo, what provides it?
>
>
>>
>>
>>
>> Nicolas Repentin
>>
>> <nicolas at shivaserv.fr>
>>
>> --------- Original Message ---------
>> *From*: Robert Moskowitz
>> *To*: Conversations around CentOS on ARM hardware
>> *Date*: Tue Sep 01 19:04:38 GMT+02:00 2015
>> *Subject*: Re: [Arm-dev] System time
>>
>>
>> On 09/01/2015 12:16 PM, Nicolas wrote:
>>> Hello
>>>
>>> I don't think any armv7 board like cubie has a battery to backup clock
>>> I think ntpd is the only way, and seems to work well on my bpi with 
>>> c7. I will check if dns resolution works when date is 1970.
>>>
>>> I think setting the currenttime can be a good idea on the rbf tool :-)
>>
>> On the Fedora-arm list I was pointed to Systemd-timesyncd
>>
>> This does MOST of what I want.  All that I think needs to be added is 
>> for it to be enabled in the image and a initial date/time of the 
>> image built date be there so the firstboot has a decent time.
>>
>>>
>>> Nicolas Repentin
>>> <nicolas at shivaserv.fr>
>>>
>>>
>>> Le 1 septembre 2015 18:12, Robert Moskowitz a écrit:
>>>> How is system time set at boot? Is ntpdate run after the network is
>>>> ready?  How long does it retry waiting for the network to be 
>>>> available?
>>>>
>>>> I have seen a number of challenges becuase the system time is back at
>>>> the epoch start as there is no battery rtc.  And  I wonder how many
>>>> armv7 boards have a battery to maintain time across boots?
>>>>
>>>> Minimally, a process could right the time, in the proper format, to a
>>>> file, say /etc/currenttime every 5 min and at shutdown.
>>>>
>>>> Then date can be run early in the boot process, piping this file 
>>>> in.  It
>>>> would not be perfect and does not help, much for new installs, but
>>>> better than epoch start.
>>>>
>>>> Plus /etc/currenttime can be at least set to the image build date/time
>>>> so not even firstboot will be at epoch start.
>>>>
>>>> Opinions?
>>>>
>>>>
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>>>
>>>
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