[systemd-devel] Time synchronization over HTTP?

[Mantas Mikulėnas]

On Mon, Jun 27, 2016 at 5:34 AM, Kai Hendry <hendry at webconverger.com> wrote:

> Hi there,
>
> I had a quick look at
> https://github.com/systemd/systemd/tree/master/src/timesync to try work
> out if /usr/lib/systemd/systemd-timesyncd had some sort of fallback if
> ntp UDP port 123 traffic is blocked.
>
> This happens all too often with my deployments of Webconverger and I was
> wondering if asking for HTTP based time synchronization was a sane thing
> to ask for from systemd.
>
> An example implementation can be found here:
>
> https://github.com/ccrisan/motioneyeos/blob/master/board/common/overlay/etc/init.d/S50date#L31


Who would host the sync server? Or would you just point it at a random site
and hope its operators don't mind? It's already bad enough that systemd
defaults to Google's private NTP servers, IMHO.

(I also have a strong dislike for network admins who cling to their "HTTP
only" firewall policies... I don't see why NTP is a 'lesser' protocol than
HTTP and DNS, both of which require either the respective ports or a local
proxy in order to work. Timesyncd already supports picking up local NTP
servers from DHCP, afaik.)

-- 
Mantas Mikulėnas <grawity at gmail.com>
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