Script to monitor your monitoring tool.

monitoring-monitoring.sh

#!/bin/sh

# PING test targets
ping_targets="example.org"

# HTTP STATUS test targets
status_targets="http://example.org:5000"

# Notification recipients
mail_to="[email protected]"

# Hosts, that failed at least one check
failed_hosts=""

# Ping Tests
for host in $ping_targets
do
    ping -c 1 $host > /dev/null

    if [ $? -ne 0 ]; then
        if [ "$failed_hosts" == "" ]; then
            failed_hosts="$host"
        else
            failed_hosts="$failed_hosts, $host"
        fi
    fi
done

# HTTP Status Tests
for host in $status_targets
do
    http_status=`curl -LI "$host" -o /dev/null -w '%{http_code}' -s`

    if [ "$http_status" != "200" ]; then
        if [ "$failed_hosts" == "" ]; then
            failed_hosts="$host"
        else
            failed_hosts="$failed_hosts, $host"
        fi
    fi
done

# Send Emails to defined addresses
if [ "$failed_hosts" != "" ]; then
    for to in $mail_to
    do
        echo "Ping failed for: $failed_hosts" | mailx -s "Failed ping targets" $mail_to
    done
fi