Munin contributed plugins

#!/bin/sh

# -*- sh -*-

#

# Plugin to monitor network connection activity using a subset of data from /proc/net/netstat

#

# Parameters:

#

#   config   (required)

#   autoconf (optional - only used by munin-config)

#

# Environment variables (optional):

#

#   IGNORED_FIELDS: comma-separated list of regexs for fields to ignore

#

# Author: Ted Dumitrescu (ted@mixpanel.com, webdev@cmme.org)

#

# Magic markers (optional - used by munin-config and some installation

# scripts):

#%# family=auto

#%# capabilities=autoconf

NETSTATS="/proc/net/netstat"

if [ -z $IGNORED_FIELDS ]; then

  IGNORED_FIELDS='TW\.,TCPPrequeued,TCPDirectCopy,TCPHPHits,TCPPureAcks,TCPHPAcks,TCPRcvCoalesce'

fi

TO_REMOVE=`echo $IGNORED_FIELDS | sed 's/,/\\\|/g'`

STRIP_OUTPUT="/\($TO_REMOVE\)/d"

if [ "$1" = "autoconf" ]; then

  if [ -r $NETSTATS ]; then

    echo yes

    exit 0

  else

    echo no

    exit 1

  fi

fi

if [ "$1" = "config" ]; then

  echo 'graph_title Netstat'

  echo 'graph_args -l 0 --base 1000'

  echo 'graph_category network'

  echo 'graph_period second'

  echo 'graph_info TcpExt stats'

  awk 'NR < 2 { for (i=2; i<=NF; i++) { printf("%s.label %s\n%s.type DERIVE\n%s.min 0\n", $i, $i, $i, $i); } }' $NETSTATS | sed "$STRIP_OUTPUT"

  exit 0

fi

awk 'NR < 2 { for (i=2; i<=NF; i++) { fn[i]=$i; }; getline; for (i=2; i<=NF; i++) { printf("%s.value %s\n", fn[i], $i); } }' $NETSTATS | sed "$STRIP_OUTPUT"