On Wed, 14 Feb 2007, Phil Meyer wrote:
Jacob (=Jouk) Jansen wrote:
Chris wrote on 18:12:06.46
On 2/12/07, Jacob (=Jouk) Jansen <joukj@xxxxxxxxxxxxxxxxxxxx> wrote:
[snip]
I have a problem with NTP on a FC6 machine connected to a adsl
connection.
When starting up the machine it tells me it fails to synch with the
server
(it started doing this one or two months ago) after that is sais that
ntpd
is started succesfully. I doubt this because I start noticing slight (1/2
minute) time differences with other machines.
[snip]
Are you running NetworkManager?
This is a problem with NetworkManager. It starts AFTER ntpd. The fix is to
cause ntpd to start after NetworkManager but that is not a good solution in
my mind.
You are also supposed to be able to declare a server as 'dynamic' in
/etc/ntp.conf. This does not seem to correct the problem for me.
So, two options remain:
1. modify /etc/init.d/ntpd to start later.
2. start ntpd from rc.local, which runs last.
Personally I hate to modify system files that I then have to track over
releases. In either case, here, this is necessary. :(
It is my opinion that the ntpd maintainer needs to start ntpd AFTER
NetworkManager.
ntpd is: 58
NetworkManager is: 98
99 is sorta conventionally held for local customized startups scripts, so I
don't know what would be best. Obviously the NetworkManager maintainers feel
the need to start as close to the end as reasonable.
So, I guess its best to:
# /sbin/chkconfig ntpd off
and then edit /etc/rc.local and add:
service ntpd start
to then end of it.
This won't work either. The NetworkManager daemon starts on bootup, but
no connection is made until a user logs in.
The correct solution is to use NetworkManagerDispatcher(1) to start ntpd
when the connection is made.
Don't modify any system files or rc.local. Just turn ntp off at boot and
add a script to /etc/NetworkManager/dispatcher.d/ that runs "service ntpd
start" when an interface is brought up and "service ntpd stop" when it's
brought down. Instructions in the man page.
Good Luck!
--
Matthew Saltzman
Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs
