If you want to use NTP, they you should store GMT in the hardware clock,
otherwise you might end up with windows style 'my clock is an hour out'
bugs. Needless to say, this does not work with a dual-boot
linux/windows box.
The RH approach of setting the time with ntpdate before starting ntpd is
IMHO wrong but it does not cause me enough trouble to worry about fixing it.
As for the original problem, ntpd probably relies on DNS to find the
servers and if it can't find any servers it may fail to start. This is
normal daemon behavior, normal for apache anyway.
John.
Grant McChesney wrote:
On 10/11/06, Dag Wieers <dag@xxxxxxxxxx> wrote:
Hi,
I had the following problem today. Because of a misconfigured
network switch one system suddenly didn't have any network.
After a reboot (with the network still unavailable) NTPD refused to
start.
Most likely because the initial ntpdate failed to work. I find this
troubling, because when the network was restored, NTPD could have resumed
working (like I'd expect from a true daemon).
I too have similar complaints with NTPD on CentOS 3. If any of my
CentOS 3 servers lose power, NTPD refuses to start on next boot. If I
check the status on the ntpd process, it says process is dead but pid
file exists. Server time changes to hwclock, which is usually off 1
hour thanks to daylight savings. Interestingly enough I have never
had the problem on a CentOS 4 server.
Now, what was more peculiar was that the hardware clock was completely
off. I also had assumed that somehow the hardware clock was kept in sync,
but now after rebooting without network, the system clock was skewed.
Is there some way to:
+ Make ntpd run, even when no ntp-server could be contacted
+ Make ntpd synchronise the hardware clock automatically
PS Yes, I know I can run ntpdate from cron or run hwclock to synchronize
my hardware clock. But shouldn't this be part of the infrastructure
(either ntpd or the initscripts) ?
That would be a nice feature in the initscript. I've settled for the
cron fix for now to keep my hwclock in sync.
Grant
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--
John Newbigin
Computer Systems Officer
Faculty of Information and Communication Technologies
Swinburne University of Technology
Melbourne, Australia
http://www.ict.swin.edu.au/staff/jnewbigin
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