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#!/bin/bash
## check bond interface
## Copyright (c) 2017, Namecheap.com
## Yuri Muravyov <yuriy.muravyov@namecheap.com>
## modified by Volodymyr Kuprikov
## modified by Dmitriy Yalanskiy
## modified by Bogdan Kukharskiy (added exclude bond slave interface possibility, bugs fixed)
REVISION=0.5.0
PROGNAME=${0##*/}
declare -a EXCLUDE_ARRAY=()
WARN=0.3
CRIT=1
BOND=""
PIFACE=""
OK_STATUS=$'\t'
WARN_STATUS=""
CRIT_STATUS=""
#Function for checking an existance in an array ($1) of an element ($2)
function contains() {
local n=$#
local value=${!n}
for ((i=1;i < $#;i++)) {
if [ "${!i}" == "${value}" ]; then
echo "y"
return 0
fi
}
echo "n"
return 1
}
print_revision() {
echo "$PROGNAME $REVISION"
}
print_usage() {
echo "Usage: $PROGNAME [options]"
echo " e.g. $PROGNAME -b bond0"
echo " $PROGNAME -b bond0 -p eth0"
echo " $PROGNAME -x eth0"
echo " $PROGNAME -b bond0 -w 0.1 -c 0.2"
echo " $PROGNAME -b bond0 -p eth0 -w 0.5 -c 3"
echo " $PROGNAME -b bond0 --disable-check-errors all --disable-check-drops all"
echo
echo "Options:"
echo -e "\t --bond | -b bond_interface \t\t bond interface name"
echo -e "\t --exclude | -x bond slave interface \t exclude bond slave interface from check, optional, string (can be a list separated by ',')"
echo -e "\t --warning | -w NUM \t\t\t warning number of TX/RX errors and drops per second, you can use float numbers (default 0.3)"
echo -e "\t --critical | -c NUM \t\t\t critical number of TX/RX errors and drops per second, you can use float numbers (default 1)"
echo -e "\t\t\t\t\t\t if 'Critical' and 'Warning' options aren't defined, only bond interface state will be checked"
echo -e "\t --primary-interface | -p interface \t primary slave interface name (optional)"
echo -e "\t --disable-check-errors TYPE-OF-ERRORS \t may be in value rx, tx or all"
echo -e "\t --disable-check-drops TYPE-OF-DROPS \t may be in value rx, tx or all"
echo -e "\t --help | -h \t\t\t\t print help"
echo -e "\t --version | -V \t\t\t print version"
}
print_help() {
print_revision
echo
echo "This plugin checks Linux bonding interface status"
echo
print_usage
echo
exit 3
}
# parse cmd arguments
if [ "$#" -gt 0 ]; then
while [ "$#" -gt 0 ]; do
case "$1" in
'--help'|'-h')
print_help
;;
'--version'|'-V')
print_revision
exit 3
;;
'--bond'|'-b')
BOND="$2"
shift 2
;;
'--exclude'|'-x')
IFS=, read -r -a EXCLUDE_ARRAY <<< "$2" unset IFS
shift 2
;;
'--warning'|'-w')
WARN="$2"
shift 2
;;
'--critical'|'-c')
CRIT="$2"
shift 2
;;
'--primary-interface'|'-p')
PIFACE="$2"
shift 2
;;
'--disable-check-errors')
DISABLED_ERRORS="$2"
shift 2
;;
'--disable-check-drops')
DISABLED_DROPS="$2"
shift 2
;;
*)
echo "Unknown option!"
print_usage
exit 3
;;
esac
done
fi
if [[ -z "${BOND}" ]]; then
BONDS="$(ls -1 /proc/net/bonding/|xargs)"
else
BONDS="${BOND}"
fi
if [[ -z "$WARN" || -z "$CRIT" ]]; then
echo "Both 'Warning' and 'Critical' options must be set"
exit 3
fi
# Check if 'Critical' is not less than 'Warning'
if (( $(echo "$WARN > $CRIT" | bc -l) )); then
echo "'Critical' option cannot be less than 'Warning' option"
exit 3
fi
DISABLED_ERRORS="${DISABLED_ERRORS:-none}"
DISABLED_DROPS="${DISABLED_DROPS:-none}"
declare -i COUNTIF
for BOND in $BONDS; do
if [ ! -f "/proc/net/bonding/${BOND}" ]; then
echo "No bond interface with name ${BOND} found"
exit 3
fi
INTERFACES=$(grep 'Slave Interface' /proc/net/bonding/${BOND} | cut -d ' ' -f 3 | tr '\n' ' ' | sed 's/ $//')
for IFACE in $INTERFACES; do
COUNTIF+=1
if [ "$(contains "${EXCLUDE_ARRAY[@]}" "${IFACE}")" == "y" ]; then #checking that IFACE is in excluded array (n means NOT found in exclude_array, y is for found)
continue
fi
IFSTATE="$(grep "Slave Interface: $IFACE" -A1 /proc/net/bonding/${BOND}|awk '/MII Status:/ {print $3}')"
[ "$IFSTATE" != 'up' ] && CRIT_STATUS+="$IFACE from ${BOND} is $IFSTATE; "
done;
#for fault-tolerance mode only
BSTATE="$(awk '/Currently Active Slave/ {print $4}' /proc/net/bonding/${BOND})"
[ "$BSTATE" = 'None' ] && CRIT_STATUS+="${BOND} interface have no active slaves. "
[[ "$PIFACE" != '' && "$BSTATE" != "$PIFACE" ]] && WARN_STATUS+="${BOND} interface have unexpected primary slave interface $BSTATE. "
[[ $COUNTIF -lt 2 ]] && CRIT_STATUS+="$BOND interface use less than 2 slave interfaces. "
if [[ -f /tmp/nagios-proc-net-dev.tmp && -n "$WARN" && -n "$CRIT" ]]; then
#Used suffixes
# _P - previous
# _C - current
# _D - delta
# _A - average
TIME_P="$(/usr/bin/stat --format='%Y' /tmp/nagios-proc-net-dev.tmp)"
TIME_C="$("date" +%s)"
TIME_D=$(( $TIME_C-$TIME_P ))
for IFACE in $BOND $INTERFACES; do
#echo "now for =${IFACE}="
STR="$(awk -v iface="$IFACE" '$1 == iface ":" {print $4"-"$5"-"$12"-"$13}' /proc/net/dev)"
IFS=-
set $STR
RX_ERR_C="$1"
RX_DRP_C="$2"
TX_ERR_C="$3"
TX_DRP_C="$4"
unset IFS
STR="$(awk -v iface="$IFACE" '$1 == iface ":" {print $4"-"$5"-"$12"-"$13}' /tmp/nagios-proc-net-dev.tmp)"
IFS=-
set $STR
RX_ERR_P="$1"
RX_DRP_P="$2"
TX_ERR_P="$3"
TX_DRP_P="$4"
unset IFS
RX_ERR_D=$(( $RX_ERR_C-$RX_ERR_P ))
RX_DRP_D=$(( $RX_DRP_C-$RX_DRP_P ))
TX_ERR_D=$(( $TX_ERR_C-$TX_ERR_P ))
TX_DRP_D=$(( $TX_DRP_C-$TX_DRP_P ))
RX_ERR_A=$(echo "scale=2; $RX_ERR_D/$TIME_D"|bc|sed 's/^\./0./' )
RX_DRP_A=$(echo "scale=2; $RX_DRP_D/$TIME_D"|bc|sed 's/^\./0./' )
TX_ERR_A=$(echo "scale=2; $TX_ERR_D/$TIME_D"|bc|sed 's/^\./0./' )
TX_DRP_A=$(echo "scale=2; $TX_DRP_D/$TIME_D"|bc|sed 's/^\./0./' )
if [ "$DISABLED_ERRORS" != "rx" ] && [ "$DISABLED_ERRORS" != "all" ]; then
[ "$(echo $RX_ERR_A'>'$CRIT | bc -l)" -eq 1 ] && CRIT_STATUS+="$IFACE RX ERRORS: $RX_ERR_A per sec. "
fi
if [ "$DISABLED_DROPS" != "rx" ] && [ "$DISABLED_DROPS" != "all" ]; then
[ "$(echo $RX_DRP_A'>'$CRIT | bc -l)" -eq 1 ] && CRIT_STATUS+="$IFACE RX DROPS: $RX_DRP_A per sec. "
fi
if [ "$DISABLED_ERRORS" != "tx" ] && [ "$DISABLED_ERRORS" != "all" ]; then
[ "$(echo $TX_ERR_A'>'$CRIT | bc -l)" -eq 1 ] && CRIT_STATUS+="$IFACE TX ERRORS: $TX_ERR_A per sec. "
fi
if [ "$DISABLED_DROPS" != "tx" ] && [ "$DISABLED_DROPS" != "all" ]; then
[ "$(echo $TX_DRP_A'>'$CRIT | bc -l)" -eq 1 ] && CRIT_STATUS+="$IFACE TX DROPS: $TX_DRP_A per sec. "
fi
if [ "$DISABLED_ERRORS" != "rx" ] && [ "$DISABLED_ERRORS" != "all" ]; then
[ "$(echo $RX_ERR_A'>'$WARN | bc -l)" -eq 1 ] && WARN_STATUS+="$IFACE RX ERRORS: $RX_ERR_A per sec. "
fi
if [ "$DISABLED_DROPS" != "rx" ] && [ "$DISABLED_DROPS" != "all" ]; then
[ "$(echo $RX_DRP_A'>'$WARN | bc -l)" -eq 1 ] && WARN_STATUS+="$IFACE RX DROPS: $RX_DRP_A per sec. "
fi
if [ "$DISABLED_ERRORS" != "tx" ] && [ "$DISABLED_ERRORS" != "all" ]; then
[ "$(echo $TX_ERR_A'>'$WARN | bc -l)" -eq 1 ] && WARN_STATUS+="$IFACE TX ERRORS: $TX_ERR_A per sec. "
fi
if [ "$DISABLED_DROPS" != "tx" ] && [ "$DISABLED_DROPS" != "all" ]; then
[ "$(echo $TX_DRP_A'>'$WARN | bc -l)" -eq 1 ] && WARN_STATUS+="$IFACE TX DROPS: $TX_DRP_A per sec. "
fi
done
fi
bonding_mode=$(grep 'Bonding Mode: ' /proc/net/bonding/${BOND})
slave_interfaces="Slave Interfaces: ${INTERFACES[*]}"
if [[ -n "$BSTATE" ]]; then
active_slave="Currently Active Slave: $BSTATE"
else
active_slave=""
fi
OK_STATUS="${OK_STATUS}${BOND}'s ${bonding_mode}, ${slave_interfaces}"
# Append active slave if present
if [[ -n "$active_slave" ]]; then
OK_STATUS="${OK_STATUS}, $active_slave"
fi
OK_STATUS="${OK_STATUS}"$'\n\t'
done
cp -f /proc/net/dev /tmp/nagios-proc-net-dev.tmp
if [ $? -eq 1 ]; then
echo "Can't rewrite last state file (/tmp/nagios-proc-net-dev.tmp), check file permissions"
exit 3
fi
[ "$CRIT_STATUS" != '' ] && echo Critical: $CRIT_STATUS && exit 2
[ "$WARN_STATUS" != '' ] && echo Warning: $WARN_STATUS && exit 1
if [ "$OK_STATUS" = '' ]; then
echo "OK: No bonding interface found"
exit 0
else
echo "OK: $OK_STATUS"
if [[ ${#EXCLUDE_ARRAY[@]} -gt 0 ]]; then
echo "Excluded from check: ${EXCLUDE_ARRAY[*]}"
fi
exit 0
fi
echo "Something wrong with check"
exit 3