ntpplot leverages the robust statistics repoting built into NTP to plot various graphs regarding normal and abnormal operation.
Anyone running a production NTP server (whether in an internal environment such as a datacenter or an office, or an external pulic facing environment such as contribution to pool.ntp.org) will benefit from a little transperency.
The concept is simple and strives to leverage existing components:
- A configuration file that sets up statistics output for NTP is included with
includefileinntp.conf. - A Gnuplot script that generates the plots is configured with cron to run preidically.
- An Apache configuration file allows serving the plots folder and images over HTTP.
- NTP version 4.2.8 or higher (untested with lower NTP 4.x versions, unlikely to work with 3.x and lower due to log format changes)
- Gnuplot version 4.6 or higher (untested with lower Gnuplot versions)
- Apache version 2.4 (optional - needed so serve plots over HTTP, will not work with Apache 2.2 as is)
git clone https://github.com/erikkugel/ntpplot.git /opt/ntpplot
mkdir -p -v /var/log/ntp
echo "includefile /opt/ntpplot/conf/ntp-stats.conf" >> /etc/ntp.conf
ln -v -s -f /opt/ntpplot/conf/cron-ntpplot /etc/cron.d/ntpplot
echo "Include /opt/ntpplot/conf/httpd-ntpplot.conf" >> /etc/httpd/httpd.conf
See the full Wiki here.
NTP Troubleshooting Guidelines
NTP Advanced Logging Configuration