Munin contributed plugins

#!/usr/bin/env python3

# -*- python -*-

# This plugin graphs the following values of the ARRIS TM502G cable

# modem:

#

# * upstream and downstream powers

# * downstream signal-to-noise ratio

#

# The values are retrieved from the cable modem's status web pages at

# 192.168.100.1. So, this plugin must be installed on a munin node

# which can access those pages.

#

# Symlink this plugin into the node's plugins directory (like

# /etc/munin/plugins) as arris-tm502g_power for the powers, and

# arris-tm502g_snr for the SNR.

#

# Author: Kenyon Ralph <kenyon@kenyonralph.com>

#

# The latest version of this plugin can be found in the munin contrib

# repository at https://github.com/munin-monitoring/contrib. Issues

# with this plugin may be reported there. Patches accepted through the

# normal github process of forking the repository and submitting a

# pull request with your commits.

import html.parser

import os

import urllib.request

import sys

plugin_name=list(os.path.split(sys.argv[0]))[1]

plugin_var=plugin_name.split('_', 1)[-1]

if len(sys.argv) == 2 and sys.argv[1] == 'config':

    if plugin_var == 'power':

        print('graph_title ARRIS Cable Modem Power')

        print('graph_vlabel Signal Strength (dBmV)')

        print('graph_info This graph shows the downstream and upstream power reported by an ARRIS TM502G cable modem.')

        print('downstream.label Downstream Power (dBmV)')

        print('upstream.label Upstream Power (dBmV)')

    if plugin_var == 'snr':

        print('graph_title ARRIS Cable Modem SNR')

        print('graph_vlabel Signal-to-Noise Ratio (dB)')

        print('graph_info This graph shows the downstream signal-to-noise ratio reported by an ARRIS TM502G cable modem.')

        print('snr.label Signal-to-Noise Ratio (dB)')

    print('graph_category network')

    sys.exit(0)

class ArrisHTMLParser(html.parser.HTMLParser):

    stats = list()

    down_power = 'U'

    up_power = 'U'

    snr = 'U'

    def handle_data(self, data):

        data = data.strip()

        if data != '' and 'dB' in data:

            self.stats.append(data)

    def done(self):

        """Call this when done feeding the HTML page to the parser."""

        self.down_power = self.stats[0].split()[0]

        self.snr = self.stats[1].split()[0]

        self.up_power = self.stats[2].split()[0]

page = urllib.request.urlopen("http://192.168.100.1/")

parser = ArrisHTMLParser()

for line in page:

    parser.feed(line.decode())

parser.done()

if plugin_var == 'power':

    print('downstream.value ' + parser.down_power)

    print('upstream.value ' + parser.up_power)

    sys.exit(0)

if plugin_var == 'snr':

    print('snr.value ' + parser.snr)

    sys.exit(0)