Re: CentOs 5.6 and Time Sync

Mailing List <mail_list@xxxxxxxxxx> · Wed, 13 Apr 2011 16:22:39 -0400

On 4/13/2011 3:35 PM, Cal Webster wrote:

I'm running the same kernel and ntp versions and I'm having no problems
at all on ntp servers or clients.

If my previous suggestions didn't help maybe you could share contents of
the following files and output of some commands so the list can see what
you've got.

/etc/ntp.conf
/etc/ntp/ntpservers
/etc/ntp/step-tickers
/var/lib/ntp/drift

grep ntpd /var/log/messages*
(please remove repeated messages for clarity)

Most recent entries in /var/log/ntpd.log

SELinux could also be playing a role.

Are you running SELinux enabled, permissive, or disabled?
What mode was it running before it stopped working?
Are there any possibly related "avc" messages in /var/log/messages
or /var/audit/audit.log?

./Cal

 /etc/ntp;

restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict -6 ::1
server 0.centos.pool.ntp.org
server 1.centos.pool.ntp.org
server 2.centos.pool.ntp.org
server  127.127.1.0     # local clock
fudge   127.127.1.0 stratum 10
driftfile /var/lib/ntp/drift
keys /etc/ntp/keys

There is no /etc/ntp/ntpservers

/etc/ntp/step-tickers is an empty file.

/var/lib/ntp/drift;
  -65.219

I have no /var/log/ntpd.log

/varlog/messages;  This is the log using stock updated kernel.

Apr 12 03:32:35 Server ntpd[2797]: synchronized to LOCAL(0), stratum 10
Apr 12 03:33:36 Server ntpd[2797]: synchronized to 173.9.142.98, stratum 2
Apr 12 15:51:56 Server ntpd[2797]: time reset +43208.248852 s
Apr 12 15:51:56 Server ntpd[2797]: kernel time sync enabled 0001
Apr 12 15:56:03 Server ntpd[2797]: synchronized to LOCAL(0), stratum 10
Apr 12 15:56:26 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 3
Apr 12 16:00:22 Server ntpd[2797]: synchronized to 173.9.142.98, stratum 2
Apr 12 16:16:59 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 2
Apr 12 16:16:57 Server ntpd[2797]: time reset -1.830305 s
Apr 12 16:20:27 Server ntpd[2797]: synchronized to LOCAL(0), stratum 10
Apr 12 16:22:35 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 2
Apr 12 16:28:01 Server ntpd[2797]: synchronized to 173.9.142.98, stratum 2
Apr 12 16:32:29 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 3
Apr 12 16:36:36 Server ntpd[2797]: synchronized to 173.9.142.98, stratum 2
Apr 12 16:40:05 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 3
Apr 12 16:41:57 Server ntpd[2797]: synchronized to LOCAL(0), stratum 10
Apr 12 16:42:09 Server ntpd[2797]: synchronized to 173.9.142.98, stratum 2
Apr 12 16:47:28 Server ntpd[2797]: synchronized to LOCAL(0), stratum 10
Apr 12 16:48:28 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 3
Apr 12 16:51:44 Server ntpd[2797]: synchronized to 173.9.142.98, stratum 2
Apr 12 16:53:52 Server ntpd[2797]: synchronized to 173.193.227.67, stratum 4
Apr 12 16:58:06 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 3
Apr 12 17:00:18 Server ntpd[2797]: synchronized to LOCAL(0), stratum 10
Apr 12 17:04:31 Server ntpd[2797]: synchronized to 169.229.70.183, stratum 3
Apr 12 17:06:44 Server ntpd[2797]: synchronized to LOCAL(0), stratum 10
Apr 12 19:54:46 Server ntpd[2797]: ntpd exiting on signal 15
Apr 13 03:01:24 Server ntpd[2409]: ntpd 4.2.2p1@xxxxxxxx Sat Dec 19 
00:56:13 UTC 2009 (1)
Apr 13 03:01:24 Server ntpd[2410]: precision = 1.000 usec
Apr 13 03:01:24 Server ntpd[2410]: Listening on interface wildcard, 
0.0.0.0#123 Disabled
Apr 13 03:01:24 Server ntpd[2410]: Listening on interface wildcard, 
::#123 Disabled
Apr 13 03:01:24 Server ntpd[2410]: Listening on interface lo, ::1#123 
Enabled
Apr 13 03:01:24 Server ntpd[2410]: Listening on interface eth0, 
fe80::218:8bff:fe80:67db#123 Enabled
Apr 13 03:01:24 Server ntpd[2410]: Listening on interface lo, 
127.0.0.1#123 Enabled
Apr 13 03:01:24 Server ntpd[2410]: Listening on interface eth0, 
192.168.2.1#123 Enabled
Apr 13 03:01:24 Server ntpd[2410]: kernel time sync status 0040
Apr 13 03:01:30 Server ntpd[2410]: frequency initialized 0.000 PPM from 
/var/lib/ntp/drift
Apr 13 07:04:44 Server ntpd[2410]: synchronized to LOCAL(0), stratum 10
Apr 13 07:04:44 Server ntpd[2410]: kernel time sync enabled 0001
Apr 13 07:11:09 Server ntpd[2410]: synchronized to 208.75.88.4, stratum 2
Apr 13 07:17:34 Server ntpd[2410]: synchronized to 64.6.144.6, stratum 2
Apr 13 07:42:59 Server ntpd[2410]: time reset -27.586767 s
Apr 13 07:46:35 Server ntpd[2410]: synchronized to LOCAL(0), stratum 10
Apr 13 07:47:38 Server ntpd[2410]: synchronized to 199.249.224.123, 
stratum 2
Apr 13 07:51:53 Server ntpd[2410]: synchronized to 64.6.144.6, stratum 2
Apr 13 09:27:19 Server ntpd[2410]: ntpd exiting on signal 15
Apr 13 09:27:19 Server ntpd[6743]: ntpd 4.2.2p1@xxxxxxxx Sat Dec 19 
00:56:13 UTC 2009 (1)

  Selinux is disabled, and just a note also. This is a stock install of 
of ntp. I never had to do any fudging with it cause it just worked up 
until the update.

 I also have no /var/log/audit/audit.log.

tia.

Brian

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