ISC DHCP messages counter written in python

Forked from: https://github.com/wungad/isc-stats

This application watches ISC DHCP logfile for DISCOVER/OFFER/REQUEST/ACK/NAK messages and listens on given TCP port for incoming connections to report the the statistics to web clients in JSON format. I have written this to monitor the number of messages for our production servers which serve around 200.000 clients with variable lease time (around 1000 messages/second).

Requirements:

• Python standard library (>=2.6)

Configuration options

Usage: isc_stats.py [-a address] [-p port] [-f file] [-l file] [-b] [-d] [-h]
    -a or --address, ip address to listen on (default 127.0.0.1)
    -p or --port, tcp port to listen on (default 8080)
    -f or --file, isc log  location (default /var/log/dhcpd.log)
    -l or --log, log location (default /var/log/isc_stats.log)
    -b or --background, run in background (default foreground)
    -d or --debug, print debug messages
    -h or --help, prints this help message

Example usage server:

$ ./isc_stats.py -f /storage/logs/iptv/dhcpd.log
INFO: Monitoring file /storage/logs/iptv/dhcpd.log with inode of 2902560
INFO: Listening on 127.0.0.1 port 8080

Example usage http client:

$ wget -t1  -O- 127.0.0.1:8080 -q
{
     "ack": 35,
     "nak": 0,
     "request": 36,
     "discover": 2829,
     "offer": 0
 }

Example usage cacti script:

$ ./cacti_script.py 
ACK:0 DISCOVER:0 NAK:0 OFFER:0 REQUEST:0

Issues:

• report issues when found
• tested on Solaris 10, Solaris 11, CentOS 6.4 with Python 2.6 and 2.7

TODO:

• add option to check files in format /path/to/file/dhcpd-%D%m%y.log
• create init script