[sdnog] Impact of new timezone in Sudan

[Manhal Mohammed]

This will be a great help for admins who run freeBSD also ISPs in sudan " most of their servers run freeBSD as I know"
Hope this discussion find them on time ^_^



"I will install a FreeBSD on a VM just to try it out "
Can we do the same for Linux?

Thank you Mr Philip


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On 28 Oct 2017, at 22:57, Philip Paeps <philip at trouble.is<mailto:philip at trouble.is>> wrote:

On 2017-10-28 18:50:31 (+0200), Philip Paeps wrote:

On 2017-10-24 22:15:56 (+0200), Manhal Mohammed wrote:

We all know that Sudan will change its timezone from GMT+3 to GMT+2 after few days "1st of November "
so I'm curious about the effect of this change on services, transactions, SSLs licences, DB. .. etc?
specially the services with timestamps :/
Also what will be the impact of this change on ISPs ?

As Patrick pointed out: if you're running your servers and infrastructure on UTC (which you really, really, really should be doing), you should not have any serious problems. Time will continue to move monotonically forward. Anything that converts your UTC timestamps to local time will need to be aware of the new timezone though.

You should make sure that anything which cares about timezones has the updated timezone data (2017c of tzinfo) installed:

https://mm.icann.org/pipermail/tz-announce/2017-October/000047.html

This hasn't landed in FreeBSD yet, but it will soon (people have been prodded and worst case I can do it). Other operating systems will probably update soon too.

I've updated FreeBSD-CURRENT tonight and I'll merge the update back to supported stable branches on Monday. I'll try to get patches into supported releases ASAP too, but it might be too late to get binary updates on time.

If you're really worried, you can patch your system (fairly) trivially by hand. E.g. for a system running FreeBSD 11.1:

% svnlite co https://svn.freebsd.org/base/releng/11.1/ src
% svnlite merge -c r325059 ^/head/ src
% cd src/share/zoneinfo
% make obj && make depend && make
% su
[root password]
# make install


If you're running another release, change the releng/11.1 appropriately.

You can check that your system is up to date by comparing the Africa/Juba and Africa/Khartoum timezones. On an outdated system they will be the same, on a patched system they'll be different:

% cd /usr/share/zoneinfo
% diff -u Africa/Juba Africa/Khartoum
Files Africa/Juba and Africa/Khartoum differ


Again though: unless you have systems that care about the correct local time, you should not really have a problem.

Let me know if you need help updating FreeBSD systems.

Philip

--
Philip Paeps
Senior Reality Engineer
Ministry of Information

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