[Cialug] xen and ntp on centos

[Daniel A. Ramaley]

Do you have the Xen tools installed on the guest?

On 2011-08-04 at 15:33:44, Barry Von Ahsen wrote:
>yes, this again :)
>
>every document in the world says run ntpd on dom0, and domU will
>automatically update, except it doesn't on centos.  in the last 24
>hours (when I manually fixed it), domU is nearly 40 minutes fast.
>
>several sources said to check /proc/sys/xen/independent_wallclock on
>the guest, but I don't have a /proc/sys/xen there, am I missing a
>package?
>
>
>simul-date:
>[barry at xen ~]# date
>Thu Aug  4 15:25:45 CDT 2011
>[barry at domU ~]$ date
>Thu Aug  4 16:04:40 CDT 2011
>
>
>dom0:
>[barry at xen ~]$ cat /etc/issue
>CentOS release 5.6 (Final)
>Kernel \r on an \m
>
>[barry at xen ~]$ uname -a
>Linux 2.6.18-238.19.1.el5xen #1 SMP Fri Jul 15 08:16:59 EDT 2011
>x86_64 x86_64 x86_64 GNU/Linux
>
>[barry at xen ~]$ cat /proc/sys/xen/independent_wallclock
>0
>
>[barry at xen ~]# grep ntpd /var/log/messages
>(snip)
>Aug  3 11:04:27 xen ntpd[4008]: synchronized to 208.94.240.2, stratum
>2 Aug  3 12:11:07 xen ntpd[4008]: synchronized to 209.114.111.1,
>stratum 2 Aug  4 03:50:07 xen ntpd[4008]: synchronized to
>208.94.240.2, stratum 2 Aug  4 07:44:59 xen ntpd[4008]: synchronized
>to 209.114.111.1, stratum 2 Aug  4 09:49:03 xen ntpd[4008]:
>synchronized to 208.94.240.2, stratum 2 Aug  4 14:35:21 xen
>ntpd[4008]: synchronized to 209.114.111.1, stratum 2
>
>[barry at xen ~]# rpm -qa | grep xen
>xen-libs-3.0.3-120.el5_6.3
>kernel-xen-2.6.18-238.19.1.el5
>kernel-xen-2.6.18-238.9.1.el5
>xen-3.0.3-120.el5_6.3
>
>
>
>domU:
>[barry at domU ~]$ cat /etc/issue
>CentOS release 5.6 (Final)
>Kernel \r on an \m
>
>[barry at domU ~]$ uname -a
>Linux 2.6.18-238.19.1.el5 #1 SMP Fri Jul 15 07:31:24 EDT 2011 x86_64
>x86_64 x86_64 GNU/Linux
>
>[barry at domU ~]$ cat /proc/sys/xen/independent_wallclock
>cat: /proc/sys/xen/independent_wallclock: No such file or directory
>
>[barry at domU ~]$ rpm -qa | grep xen
>(nothing)
>_______________________________________________
>Cialug mailing list
>Cialug at cialug.org
>http://cialug.org/mailman/listinfo/cialug
__
Daniel A. Ramaley
Network Engineer 2

Dial Center 112, Drake University
2407 Carpenter Ave / Des Moines IA 50311 USA
Tel: +1 515 271-4540
Fax: +1 515 271-1938
E-mail: daniel.ramaley at drake.edu