LibreNMS - snmp extend apache2

Verify you have installed:

apt install -y python-urlgrabber python-pycurl

NginX LibreNMS script

Get the script and make it executable:

wget https://raw.githubusercontent.com/librenms/librenms-agent/master/snmp/apache-stats.py -O /etc/snmp/apache-stats.py && chmod +x /etc/snmp/apache-stats.py

Create the /var/cache/librenms directory and make sure that it is owned by the user running the SNMP daemon:

mkdir -p /var/cache/librenms/ && chown -R Debian-snmp:Debian-snmp /var/cache/librenms

vHOST

Adapt your vHost like:

<VirtualHost 127.0.0.1:80>
        # The ServerName directive sets the request scheme, hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts, the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However, you must set it for any further virtual host explicitly.
        #ServerName www.example.com

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html

        ServerName 127.0.0.1

        # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
        # error, crit, alert, emerg.
        # It is also possible to configure the loglevel for particular
        # modules, e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        # For most configuration files from conf-available/, which are
        # enabled or disabled at a global level, it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf


        <Location "/server-status">
                SetHandler server-status
                Require host 127.0.0.1
        </Location>


</VirtualHost>

SNMP Configuration

Adapt your /etc/snmp/snmpd.conf with:

extend apache /etc/snmp/apache-stats.py

Restart the service.

Check Command

sudo -u Debian-snmp /etc/snmp/apache-stats.py

Sources

• https://docs.librenms.org/Extensions/Applications/#apache
• https://httpd.apache.org/docs/2.4/en/mod/mod_status.html

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