A /very/ simple OpenVZ load average aggregator with fancy colors.

vzload.sh

#!/bin/bash
# License: GNU/GPL Open Source License v3
# Authors:
#  Steven Crothers <steven.crothers@gmail.com>
#  Jean-Marc Pigeon <jmp@safe.ca>

# Default variables
NO_HEADER=0
NO_COLOR=0

# Get the options that the script was ran with
while getopts "hHC" OPTION; do
	case $OPTION in
		h)
			echo "usage $0 options"
			echo "OPTIONS:"
			echo " -h   Show this help message"
			echo " -H   Disable the header"
			echo " -C   Disable colors"
			exit 1
			;;
		H)
			NO_HEADER=1
			;;
		C)
			NO_COLOR=1
			;;
		esac
done

# Print the header dependant on what flag was passed
if [ $NO_HEADER -eq 0 ]; then
	printf " %-15s %-20s %-15s %-9s %s\r\n" "VEID" "Hostname" "Load: 1min" "5min" "15min"
fi

## Get the load for all the VEs on a hardware node
for VEID in /proc/vz/container/[0-9]*; do
	VEID=$(basename $VEID)
	source /etc/vz/conf/$VEID.conf
	LOADTOTAL=$(vzctl exec $VEID cat /proc/loadavg | awk '{print $1,$2,$3}')
	LOAD_1MIN=$(echo $LOADTOTAL | awk '{print $1}')
	LOAD_5MIN=$(echo $LOADTOTAL | awk '{print $2}')
	LOAD_15MIN=$(echo $LOADTOTAL | awk '{print $3}')
	LOAD=${LOAD_1MIN/.*}
	if [ $NO_COLOR -eq 0 ]; then
		[ $LOAD -lt 3 ] && COLOR="\033[1;32m"
		[ $LOAD -ge 3 ] && COLOR="\033[1;33m"
		[ $LOAD -ge 7 ] && COLOR="\033[1;31m"
	fi
	[ ${#HOSTNAME} -gt 20 ] && HOSTNAME="${HOSTNAME:0:17}..."
	printf "$COLOR %-15s %-20s %10s %9s %10s\033[0m\r\n" $VEID $HOSTNAME $LOAD_1MIN $LOAD_5MIN $LOAD_15MIN
done | sort -t ' ' -k 3

## Get the hardware nodes load average
LOADTOTAL=$(cat /proc/loadavg | awk '{print $1,$2,$3}')
LOAD_1MIN=$(echo $LOADTOTAL | awk '{print $1}')
LOAD_5MIN=$(echo $LOADTOTAL | awk '{print $2}')
LOAD_15MIN=$(echo $LOADTOTAL | awk '{print $3}')
LOAD=${LOAD_1MIN/.*}
if [ $NO_COLOR -eq 0 ]; then
	[ $LOAD -lt 3 ] && COLOR="\033[1;32m"
	[ $LOAD -ge 3 ] && COLOR="\033[1;33m"
	[ $LOAD -ge 7 ] && COLOR="\033[1;31m"
fi
[ ${#HOSTNAME} -gt 20 ] && HOSTNAME="${HOSTNAME:0:17}..."
printf "$COLOR %-15s %-20s %10s %9s %10s\033[0m\r\n" Total $HOSTNAME $LOAD_1MIN $LOAD_5MIN $LOAD_15MIN