I was able to create a true failover (hot-spare) setup using Linux-HA and DRBD. The two machines use a primary/secondary DRBD drive setup for /usr/local/nagios, /var/spool/mqueue, and /var/spool/clientmqueue. Linux-HA manages the virtual IP for nagios as well as bringing nagios and sendmail services up and down during a failover. This works very well, and because the mail spools are sync'ed not even unsent notifications are lost. I believe there are some previous threads about this setup, but if not I'd be happy to write up a HOW-TO. -Scott <div>On 1/29/08, magic_rooter <<a href="mailto:magic.rooter@gmail.com">magic.rooter@gmail.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;"> Hello everybody. I need to have nagios reserve server which will replace the main server when it dies. I installed nagios on another machine, copied all directory /usr/local/nagios and start reserve service Nagios. I have thound that statistics differs very much! Of course, nagios was installed in different time on each server. But when I copy status.dat file from the main server, availibility statistics on the reserve server became the same! But AFTER RESTART it returnes to its previos state:(. So, I can't solve this problem, because I can't understand what files I need to copy in order to make the full copy:(. I must mention that reserve server must not work all time. It has to be turn on ONLY when main server dies. So, what about availibility statistics? How to make statistics on reserve server STRONGLY the same as on the main server? With the great respect to everybody, Kristine Linux System Administrator ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. <a href="http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/">http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/</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">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 </blockquote></div>