NTP is configured for every server, except for some virtual machines synchronizing their clocks with the host on which they are running. It happened once or twice that the clock got desynchronized, even using NTP so I just want to make sure everything is in sync by monitoring the servers with nagios. <div class="gmail_quote">On Thu, Feb 26, 2009 at 7:48 PM, Lee Azzarello <<a href="mailto:lee@dropio.com">lee@dropio.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="Ih2E3d">On Thu, Feb 26, 2009 at 1:17 PM, David Fontaine <<a href="mailto:dav.fontaine@gmail.com">dav.fontaine@gmail.com</a>> wrote: > Hello, > > I am monitoring a few dozen of servers and I'm really satisfied with nagios. > This is a great tool. > > However, there's one (actually more than one) thing that I can't figure out > : > > I define a service : > > define service{ > use generic-service > hostgroup_name linux-servers > service_description Time > check_command check_time!public > } > > This service applies to a host group so that I don't have to define the > service for each server. The command doesn't matter but for completeness > here's what it does : it compares the time on a remote server (snmp) to the > local time and report the difference. </div>Going out on a limb here...have you considered using the Network Time Protocol to keep all your host's clocks in sync with an Internet scale network of federated time servers available to you for free? I'm using NTP on a network of 40 hosts and I never have worried about their clocks getting out of sync. -lee <div><div></div><div class="Wj3C7c"> ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD <a href="http://p.sf.net/sfu/XcvMzF8H" target="_blank">http://p.sf.net/sfu/XcvMzF8H</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </div></div></blockquote></div>