how to check servers will adjust for daylight savings?

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Operating Systems Solaris how to check servers will adjust for daylight savings?

03-25-2009

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how to check servers will adjust for daylight savings?

Hi All,

We have a few hundred Sun servers running sol7-10. How can I check that they are configured correctly to adjust for daylight savings?

I have been told they have all adjusted in the past - so should be safe. But I would like to know what package/variable deals with this, and how to check for it. Our /etc/TIMEZONE files lists the following:

Code:

# This file is /etc/default/init.  /etc/TIMEZONE is a symlink to this file.
# This file looks like a shell script, but it is not.  To maintain
# compatibility with old versions of /etc/TIMEZONE, some shell constructs
# (i.e., export commands) are allowed in this file, but are ignored.
#
# Lines of this file should be of the form VAR=value, where VAR is one of
# TZ, LANG, CMASK, or any of the LC_* environment variables.
#
TZ=GB
CMASK=022

Many thanks.

badoshi

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03-25-2009

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I found the following snippets in my notes & on the web:

DST Patches should be applied as follows:

DST patches:
Solaris 8 109809-08
Solaris 9 113225-10
Solaris 10 125378-03
Solaris 10 x86 125379-03

This is to check forthcoming changes on your host:

Code:

-bash-3.00$ /usr/sbin/zdump -v GB | grep 2009
GB  Wed Mar 25 14:13:49 2009 UTC = Wed Mar 25 14:13:49 2009 GMT isdst=0
GB  Sun Mar 29 00:59:59 2009 UTC = Sun Mar 29 00:59:59 2009 GMT isdst=0
GB  Sun Mar 29 01:00:00 2009 UTC = Sun Mar 29 02:00:00 2009 BST isdst=1
GB  Sun Oct 25 00:59:59 2009 UTC = Sun Oct 25 01:59:59 2009 BST isdst=1
GB  Sun Oct 25 01:00:00 2009 UTC = Sun Oct 25 01:00:00 2009 GMT isdst=0

I'm not sure about the patches & validity - if anyone has a more up-to-date document. It would be much appreciated.

Thanks.

badoshi

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03-25-2009

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Check if xntpd deamon is running on your system.
Check what time zone is your server configured for, see /etc/TIMEZONE file.
xntpd deamon needs to adjust clock with external servers, you need to define those servers in /etc/inet/inet.conf ,entry in this server looks like the following, since my server is syncing with europe time zone.

server europe.pool.ntp.org

When you run dmesg command it will show you clock is reset

Tirmazi

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03-25-2009

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ok I think i've found what i'm looking for. Further hunting on sunsolve found the following:

#234461: Solaris Daylight Saving Time (DST) Update (Aug 2008, Oct 2008, Mar 2009)

The following patches should be installed for DST updates:

SPARC Platform:
* Solaris 8 with patch 109809-11 or later
* Solaris 9 with patch 113225-14 or later
* Solaris 10 with patch 138856-02 or later

x86 Platform:
* Solaris 8 with patch 109810-11 or later
* Solaris 9 with patch 116545-12 or later
* Solaris 10 with patch 138857-02 or later

If you check for the above patches, then use 'zdump -v' I think that should cover things ok.

Thanks to all.

badoshi

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03-26-2009

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Quote:

Originally Posted by Tirmazi

xntpd deamon needs to adjust clock with external servers, you need to define those servers in /etc/inet/inet.conf ,

/etc/inet/ntp.conf methinks.

TonyFullerMalv

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