Hi Tomas,
>On Fri, Apr 24, 2020, 09:27 Per Jessen <per@computer.org> wrote:
>> Michael Hirmke wrote:
>>
>>> Hi *,
>>>
>>> I tried to understand the relation between chrony, timedatectl, dhcp
>>> and NetworkManager on my Tumbleweed notebook.
>>> I regularily use a LAN connection, WiFi connections and LTE
>>> connections. In every case the network information is fetched via
>>> dhcp. Do I need chrony in this environment? Or is the systemd
>>> timedatectl service sufficient?
>>
>> That depends on your requirements, how accurate do you need laptop time
>> to be? chrony sounds like it would be fine for you.
>>
>>> If I need chrony, how does chrony get the ntp server address from
>>> dhcp? I don't want to change it manually in chrony.conf.
>>
>> The dhcp infos are written to a file, for instance:
>>
>> /var/lib/dhcpcd/dhcpcd-eth0.info
>>
>> contains lines of "variable=value". Somehow chromy grabs hold of that.
>>
>> Probably slightly different with NetworkManager.
>>
>> Peter
>>
>I do not understand why would you want to change ntp server depending on
>whichever way you connect to a network. Unless you need local ntp on lan(s)
>and different one elsewhere.
Perhaps my wording was not correct - I connect to different networks
with my different interfaces.
That makes perfect sense that you need to follow local NTP.
I was under impression that this is ordinary standalone client/laptop.
>I personally do not need better time precision than ~ 1s to keep make happy
>when using network storage - for that any pool.ntp.org is good enough and
>it works everywhere, including LTE.
If you'd use kerberos, you would also need a precise time!
>Am I missing something?
>Tomas
Bye.
Michael.
--
Michael Hirmke
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