Change default start page
Edit /usr/share/nagios3/htdocs/index.html and change:
<FRAME SRC="main.html" NAME="main">
<FRAME SRC="/cgi-bin/nagios3/status.cgi?host=all" NAME="main">
Enabling external commands
Nagios 3 is not configured to look for external commands in the default configuration as a security feature. To enable external commands, you need to allow the web server write access to the nagios command pipe. the simplest way of doing this is to set check_external_commands=1 in your nagios configuration, and then change the permissions in a way which will be maintained across package upgrades (otherwise dpkg will overwrite your permission changes). The following is the recommended approach: - activate external command checks in the nagios configuration. this can be done by setting check_external_commands=1 in the file /etc/nagios3/nagios.cfg. - perform the following commands to change directory permissions and to make the changes permanent: /etc/init.d/nagios3 stop dpkg-statoverride --update --add nagios www-data 2710 /var/lib/nagios3/rw dpkg-statoverride --update --add nagios nagios 751 /var/lib/nagios3 /etc/init.d/nagios3 start
Creating a MySQL user for monitoring
GRANT USAGE ON *.* TO 'nagios'@'localhost'
GRANT USAGE ON *.* TO 'nagios'@'%'
- Ensure that /etc/nagiosgrapher/ngraph.ncfg:step matches the normal_check_interval for your services in nagios (otherwise you'll get blank graphs since nagios isn't supplying data often enough)
Changing default refresh interval
- Edit /usr/share/perl5/NagiosGrapher/HTML.pm and change the refresh value in DEFAULTS (there may be a better way to do this via config, but I haven't found it).