[ale] Forcing NTPD to set time

[Jeff Lightner]

You wouldn't really want it to correct regardless of diff.  It can have
disastrous results on some running things (especially databases).

In normal running with ntp setup it shouldn't get to that big a
difference so you probably want to find out why it is such a difference.

One thing I've noticed on dual boot setups is that Windoze and Linux
deal with the hardware clock differently if you've turned on UTC time in
the BIOS.  It might be similar for VMWare if the virtual machines are
Windoze.

I'd recommend:
1) Reboot server go into BIOS setup.
2) Turn OFF UTC in BIOS clock settings.
3) Boot up the VMWare
4) Set the system time manually with the date command.
5) Start NTP and insure it updates.  (See ntpdate command for quick
update.)
5) Set the hardware clock time with the hwclock command.
6) Start the virtual machines and insure they have the correct time.

-----Original Message-----
From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of
Chris Fowler
Sent: Monday, April 21, 2008 9:13 AM
To: ale at ale.org
Subject: [ale] Forcing NTPD to set time

I've got a VM running at our of our developer's house and I see it can
access the RTC.  I believe he has more than one VM running on that
server.   I also see that NTPD will NOT correct the time.  Here is what
I do in rc.local on that machine to get the time correct

/etc/init.d/ntpd stop
/usr/sbin/ntpdate pool.ntp.org
/etc/init.d/ntpd start

I've noticed on some machines that ntpd will complain that the diff is
so bad the time must be corrected manually.  Is there an option to force
ntpd to set the time regardless of diff?

Chris

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