Zabbix check for status of aggregated links under Linux

teamcheck.sh

#!/bin/sh

FAILED=""
SLAVES_COUNTER=""

cd /sys/class/net/

Check_iface() {
    local master="$1" slave="$2" mask="$3"
    #echo "DEBUG: check_iface $master:$slave"
    SLAVES_COUNTER="x${SLAVES_COUNTER}"
    ip -oneline link list "$slave" 2>/dev/null | egrep -q "$mask" && return
    FAILED="${FAILED}${FAILED:+,}$master:$slave"
}

Check_bond() {
    slaves="/sys/class/net/$1/bonding/slaves"
    test -s "$slaves" || return

    for iface in $(cat "$slaves"); do
        Check_iface "$1" "$iface" "BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP.+ master $1 .*state UP "
    done
}

Check_team() {
    for f in /sys/class/net/$1/lower_*; do
        test -L "$f" || continue
        Check_iface "$1" "${f##*lower_}" "BROADCAST,MULTICAST,UP,LOWER_UP.+ master $1 .*state UP "
    done
}


for iface in $(ip -oneline link list | awk -F': ' '{ print $2 }')
do
    SLAVES_COUNTER=""

    driver="$(ethtool -i "$iface" 2>/dev/null | awk '/^driver: / { print $2 }')"

    case "$driver" in
        bonding ) Check_bond "$iface" ;;
        team    ) Check_team "$iface" ;;
        *       ) continue ;;
    esac

    case "${SLAVES_COUNTER}" in
        ??* ) ;;
        *   ) FAILED="${FAILED}${FAILED:+,}$1" ;;
    esac

done

echo "${FAILED:-OK}"

## END ##

Agent config:

• UserParameter=network.teamcheck,/etc/zabbix/scripts/teamcheck.sh

Item:

• name = Team/Bond link status
• key = network.teamcheck
• info type = character
• update interval = 1m
• history = 7d
• app = Network

Trigger:

• name = Team/Bond failure on {HOST.NAME}
• severity = high
• expr = {my-linux-teamcheck-template:network.teamcheck.regexp("^OK$")}<>1