check_bond

#!/bin/bash
# Script to check eth interfaces bonding
# L.Gill 10/08/06 - V.1.0
# A.Swen 11/09/07 - V.1.1
# ------------------------------------------
# ########  Script Modifications  ##########
# ------------------------------------------
# Who    When      What
# ---    ----      ----
# A.Swen 2011-09-07	Add support for other bond module than bond0 (defaults to bond0 however)
#
#
# SETTINGS
# Defautl if is bond0
if=bond0

# commands
CAT=/bin/cat
GREP=/bin/grep
EGREP=/bin/egrep
AWK=/usr/bin/gawk
FIND=/usr/bin/find
SED=/bin/sed
WC=/usr/bin/wc
TAIL=/usr/bin/tail
ECHO=/bin/echo
LS=/bin/ls
TR=/usr/bin/tr
LSMOD=/sbin/lsmod

# FUNCTIONS
die () {
  rc=$1
  shift
  echo "==========================">&2
  echo "==== FATAL ERROR ====" >&2
  echo "==========================">&2
  echo "" >&2
  echo $@ >&2
  exit $rc
}

usage () {
  echo "==========================" >&2
  echo "==== USAGE ====" >&2
  echo "==========================" >&2
  echo "" >&2
  echo "Usage: ${me} [-i <bond interface name>]" >&2
  echo "" >&2
  echo "if no option is given this script assumes it has to check bond0" >&2
  echo "" >&2
  echo "example: ${me} -i bond1" >&2
  echo "" >&2
  exit 1
}

cleanup () {
  for tmpfile in ${BONDTMP} ${ETHLIST} ${ETHS} ${ETHDOWN};do
    [ -n "${tempfile}" -a -f "${tmpfile}" ] && rm -f ${tmpfile}
  done
}

get_options () {
  [ $# -gt 0 ]||usage
  while getopts "i:" opt;do
    case ${opt} in
      i) export if=`echo ${OPTARG}` ;;
      *) usage;;
    esac
done
}

result () {
  case $1 in
    0) echo "OK: - Bondingmode: $(grep "Bonding Mode:" /proc/net/bonding/${if})";rc=0 ;;
    1) echo "UNKNOWN: plugin error";rc=3;;
    2) echo "CRITICAL: bonding module not loaded";rc=2;;
    3) echo "WARNING: state of ${if} device $2 is $3";rc=1;;
    4) echo "UNKNOWN: no bondinterface with name ${if} found";rc=3;;
  esac
  cleanup
  exit $rc
}

# SCRIPT
[ $# -eq 1 -o $# -gt 2 ] && usage
[ $# -eq 2 ] && get_options $@

# 1st we check if bonding module is loaded
[ "$(${LSMOD}|grep bonding)" = "" ] && result 2

# test if there is any bond interface with this name
[ -f "/proc/net/bonding/${if}" ] || result 4

# test state of each if in bond
${GREP} "Slave Interface" /proc/net/bonding/${if} |awk '{print $3}'|while read ethdev;do
  state=$(grep -A1 "Slave Interface: ${ethdev}" /proc/net/bonding/${if}|tail -1|awk '{print $3}')
  [ "${state}" = "up" ]||result 3 ${ethdev} ${state}
done

# if we make it here we're ok
result 0

#END