This Howto explains how to set up nagios, so you can monitor your server.
At first, you have to install the nagios2 package:
# apt-get update && apt-get install nagios2
You can't use the default apache-config-file which comes with nagios, because in ispCP, Websites have to be under /var/www.
So you have to create a directory there, /var/www/nagios and copy the contents of /usr/share/nagios2/htdocs into this directory.
# mkdir -p /var/www/nagios/htdocs # cp -R /usr/share/nagios2/htdocs/* /var/www/nagios/htdocs/
This directory has to be owned by the www-data - User:
# chown -R www-data.www-data /var/www/nagios
Now you can create a file /etc/apache2/sites-available/nagios2.conf with the following content:
# # nagios Virtual Host Webinterface # <VirtualHost xxx.xxx.xxx.xxx:80> <-- insert your IP here ServerAdmin admin@yourdomain.com <-- insert your mail adress here DocumentRoot /var/www/nagios/htdocs ServerName nagios.yourdomain.com <-- insert your domain here ErrorLog /var/log/apache2/nagios.yourdomain.com-error.log <-- dito CustomLog /var/log/apache2/nagios.yourdomain.com-access.log combined <-- dito ScriptAlias /cgi-bin/nagios2 /var/www/nagios/cgi-bin ScriptAlias /nagios2/cgi-bin /var/www/nagios/cgi-bin <Directory /var/www/nagios> Options FollowSymLinks DirectoryIndex index.html AllowOverride AuthConfig Order Allow,Deny Allow From All AuthName "Nagios Access" AuthType Basic AuthUserFile /etc/nagios2/htpasswd.users require valid-user </Directory> <Directory "/usr/lib/cgi-bin/nagios2"> Options ExecCGI AllowOverride None Order allow,deny Allow from all AuthName "Nagios Access" AuthType Basic AuthUserFile /etc/nagios2/htpasswd.users Require valid-user </Directory> </VirtualHost>
and enabled it via
# a2ensite nagios2.conf
In order to be able to run a subdomain like nagios.yourdomain.com you have to edit the files /etc/apache2/sites-available/ispcp.conf and /etc/ispcp/apache/working/ispcp.conf, go to the vhost-section of yourdomain.com and delete the *.yourdomain.com in this line:
ServerAlias www.yourdomain.com yourdomain.com *.yourdomain.com
After all this, you have to reload the apache configuration:
# /etc/init.d/apache2 reload
In the file /etc/nagios2/cgi.cfg you have to change the values physical_html_path and url_html_path as shown below:
physical_html_path=/var/www/nagios/htdocs url_html_path=/
Now you have to create a password file for nagios which has to be placed under /etc/nagios2/htpasswd.users:
# htpasswd -c /etc/nagios2/htpasswd.users nagiosadmin New password: Re-type new password:
Now, you should be able to access nagios via http://nagios.yourdomain.com, login with the username nagiosadmin and the password specified under 4.
The nagios configuration is done under /etc/nagios2/, you find the nagios documentation here: http://nagios.sourceforge.net/docs/2_0/