xenserver_host_disk_usage_monitor

#!/bin/bash
# XenServer Disk Monitoring and post message to XenCenter

# Get this host's UUID
thisUUID=`xe host-list name-label=$HOSTNAME params=uuid --minimal`

# Threshold of disk usage to report on
threshold=75    # an example of how much disk can be used before alerting

# Get disk usage
diskUsage=`df -h | grep "/$" | head -n 1 | awk {' print $5 '} | sed -n -e "s/%//p"`

# Check
if [ $diskUsage -gt $threshold ]; then
     xe message-create host-uuid=$thisUUID name="ROOT DISK USAGE" body="Disk space use has exceeded $diskUsage on `echo $HOSTNAME`!" priority="1"
fi