Quick installation how-to for Nagios on openSUSE 11.4 “Celadon” platform. Same procedure applies to other versions of opeSUSE platform. I’m using version 11.4 for my LAB purposes.
lab-gw-01:~ # zypper install nagios > nagios-devel \ > nagios-nrpe \ > nagios-nsca \ > nagios-plugins \ > nagios-plugins-extras \ > nagios-plugins-nrpe \ > nagios-plugins-zypper \ > nagios-www
Here is how installation will proceed:
Loading repository data... Reading installed packages... Resolving package dependencies... The following NEW packages are going to be installed: nagios nagios-devel nagios-nrpe nagios-nsca nagios-plugins nagios-plugins-extras nagios-plugins-nrpe nagios-plugins-zypper nagios-www The following recommended packages were automatically selected: nagios nagios-plugins nagios-www 9 new packages to install. Overall download size: 3.5 MiB. After the operation, additional 11.7 MiB will be used. Continue? [y/n/?] (y): y Retrieving package nagios-plugins-nrpe-2.12-22.3.x86_64 (1/9), 17.0 KiB (38.0 KiB unpacked) Retrieving: nagios-plugins-nrpe-2.12-22.3.x86_64.rpm [done] Retrieving package nagios-plugins-1.4.15-3.2.x86_64 (2/9), 657.0 KiB (3.5 MiB unpacked) Retrieving: nagios-plugins-1.4.15-3.2.x86_64.rpm [done (515.9 KiB/s)] Retrieving package nagios-nrpe-2.12-22.3.x86_64 (3/9), 31.0 KiB (60.0 KiB unpacked) Retrieving: nagios-nrpe-2.12-22.3.x86_64.rpm [done] Retrieving package nagios-plugins-zypper-1.38-3.1.noarch (4/9), 13.0 KiB (27.0 KiB unpacked) Retrieving: nagios-plugins-zypper-1.38-3.1.noarch.rpm [done] Retrieving package nagios-3.2.3-3.4.1.x86_64 (5/9), 295.0 KiB (1.0 MiB unpacked) Retrieving: nagios-3.2.3-3.4.1.x86_64.rpm [done (415.0 KiB/s)] Retrieving package nagios-plugins-extras-1.4.15-3.2.x86_64 (6/9), 114.0 KiB (600.0 KiB unpacked) Retrieving: nagios-plugins-extras-1.4.15-3.2.x86_64.rpm [done (291.8 KiB/s)] Retrieving package nagios-nsca-2.7.2-80.1.x86_64 (7/9), 28.0 KiB (68.0 KiB unpacked) Retrieving: nagios-nsca-2.7.2-80.1.x86_64.rpm [done] Retrieving package nagios-www-3.2.3-3.4.1.x86_64 (8/9), 2.4 MiB (6.3 MiB unpacked) Retrieving: nagios-www-3.2.3-3.4.1.x86_64.rpm [done (688.7 KiB/s)] Retrieving package nagios-devel-3.2.3-3.4.1.x86_64 (9/9), 40.0 KiB (159.0 KiB unpacked) Retrieving: nagios-devel-3.2.3-3.4.1.x86_64.rpm [done] Installing: nagios-plugins-nrpe-2.12-22.3 [done] Installing: nagios-plugins-1.4.15-3.2 [done] Additional rpm output: Starting SuSEconfig, the SuSE Configuration Tool... Running module permissions only Reading /etc/sysconfig and updating the system... Executing /sbin/conf.d/SuSEconfig.permissions... Finished. Installing: nagios-nrpe-2.12-22.3 [done] Installing: nagios-plugins-zypper-1.38-3.1 [done] Installing: nagios-3.2.3-3.4.1 [done] Additional rpm output: Updating /etc/sysconfig/nagios... Installing: nagios-plugins-extras-1.4.15-3.2 [done] Installing: nagios-nsca-2.7.2-80.1 [done] Installing: nagios-www-3.2.3-3.4.1 [done] Additional rpm output: Syntax OK Installing: nagios-devel-3.2.3-3.4.1 [done] lab-gw-01:~ #
Once installation is finished nagiosadmin user is automatically assigned with permissions to access and manage Nagios instance. Default admin user definition is placed in /etc/nagios/cgi.cfg file and can be changed. However password file and user is not created. We have to create password file and user for Apache:
lab-gw-01:~ # htpasswd2 -c /etc/nagios/htpasswd.users nagiosadmin New password: Re-type new password: Adding password for user nagiosadmin lab-gw-01:~ #
Now we can set Apache and Nagios to start automatically after system restart and restart system:
lab-gw-01:~ # chkconfig apache2 on lab-gw-01:~ # chkconfig nagios on lab-gw-01:~ # reboot
And eventually start Apache and Nagios to use it immediately without restarting server just after installation:
lab-gw-01:~ # service apache2 start Starting httpd2 (prefork) done lab-gw-01:~ # service nagios start Starting Nagios done
Now it is possible to connect to fresh instance of Nagios:
http://lab-gw-01/nagios
When logon window will show up username which needs to be used is nagiosadmin and password which has been assigned to that user with htpasswd2 command.
