Munin contributed plugins

#!/usr/bin/python

# shorewall_accounting v1.1

#

# A munin plugin for tracking traffic as recorded by shorewall accounting rules.

# See "man shorewall-accounting" for all possible accounting rules.

# Basically this plugin examines the output of "shorewall -x show accounting".

# See http://atlee.ca/blog/2006/01/20/munin-shorewall/ for a description of

# the original script by Chris AtLee.

# 

# Copyright 2010 Lars Kruse <devel@sumpralle.de>

# Copyright 2006 Chris AtLee <chris@atlee.ca>

#

# Original publication: http://atlee.ca/blog/2006/01/20/munin-shorewall/

# Released under the GPL v3

import sys

import commands

import re

ACCOUNTING_LINE_EXP = re.compile(r"^\s*\d+\s+(\d+)\s+(?P<prot>\w+)\s+(?P<opt>[\w-]+)\s+(?P<in>[\w*]+)\s+(?P<out>[\w*]+)\s+(?P<source>[\w./+-]+)\s+(?P<destination>[\w./+-]+)\s*(?P<details>.*)\s*$")

KEY_ORDER = ["prot", "in", "out", "source", "destination", "details"]

REPLACE_PATTERNS = {"prot": ("^all$", "allProt"),

        "in": (r"^\*$", "allIn"),

        "out": (r"^\*$", "allOut"),

        "source": (r"^0\.0\.0\.0/0", "allSrc"),

        "destination": (r"^0\.0\.0\.0/0", "allDst"),

        "details": (r"^multiport\s+", ""),

}

def get_accounting_rule_fieldname(regdict):

    items = []

    # filter and clean all requested keys

    for key in KEY_ORDER:

        raw = regdict[key]

        pattern, replacement = REPLACE_PATTERNS[key]

        value = re.sub(pattern, replacement, raw).strip()

        if value:

            items.append(value)

    result = "_".join(items)

    # clean the fieldname: http://munin-monitoring.org/wiki/notes_on_datasource_names

    result = re.sub(r"^[^A-Za-z_]", "_", result)

    result = re.sub(r"[^A-Za-z0-9_]", "_", result)

    return result

def get_bytes_by_chain():

    status, output = commands.getstatusoutput("shorewall -x show accounting")

    if status != 0:

        raise OSError("Error running command (%s)[%i]: %s" % (trafficCmd, status, output))

    chains = {}

    for line in output.splitlines():

        m = ACCOUNTING_LINE_EXP.match(line)

        if m is not None:

            target = get_accounting_rule_fieldname(m.groupdict())

            bytes = int(m.group(1))

            if target in chains:

                chains[target] += bytes

            else:

                chains[target] = bytes

    retval = []

    names = chains.keys()

    names.sort()

    for name in names:

        retval.append((name, chains[name]))

    return retval

if len(sys.argv) > 1:

    if sys.argv[1] == "autoconf":

        print "yes"

        sys.exit(0)

    elif sys.argv[1] == "config":

        print "graph_title Shorewall accounting"

        print "graph_category network"

        print "graph_vlabel bits per ${graph_period}"

        for chain, bytes in get_bytes_by_chain():

            print "%s.min 0" % chain

            print "%s.type DERIVE" % chain

            print "%s.label %s" % (chain, chain)

            print "%s.cdef %s,8,*" % (chain, chain)

        sys.exit(0)

for chain, bytes in get_bytes_by_chain():

    print "%s.value %i" % (chain, bytes)