[Arm-dev] Re: Re: System time

[Robert Moskowitz]

I just did a test, as timedatectl indicates that ntp is on.  It did not 
set the time on reboot.  It is not doing that auto stuff mentioned in 
the description.  :(

On 09/01/2015 01:39 PM, Robert Moskowitz wrote:
> Oh, I should have read further down the page of: 
> https://wiki.archlinux.org/index.php/Systemd-timesyncd
>
> ....
>
> On 09/01/2015 01:38 PM, Robert Moskowitz wrote:
>> 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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