vzcpucheck

#!/bin/bash
#  Copyright (c) 1999-2017, Parallels International GmbH. All rights reserved.
# Copyright (c) 2017-2019 Virtuozzo International GmbH. All rights reserved.
#
#  This file is part of OpenVZ. OpenVZ is free software; you can redistribute
#  it and/or modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of the License,
#  or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
#  02110-1301, USA.
#
#  Our contact details: Virtuozzo International GmbH, Vordergasse 59, 8200
#  Schaffhausen, Switzerland.
#
# Script that prints cpu utilization information
# Usage: vzcpucheck [-v]
# See also vzcpucheck(8) man page

VERBOSE=0
XML=0
CPUINFO=/proc/cpuinfo
VEINFO=/proc/vz/veinfo
FRSHD=/proc/fairsched

function usage()
{
	echo "Usage: vzcpucheck [-v]"
	exit 2
}

if [ $# -eq 1 ]; then
	case $1 in
		"-v")
			VERBOSE=1
			;;
		"-x")
			XML=1
			;;
		*)
			usage
			;;
	esac
elif [ $# -gt 1 ]; then
	usage
fi

if [ ! -r $FRSHD ]; then
	echo "Can't read $FRSHD: Permission denied" 1>&2
	exit 1;
fi
if [ ! -r $CPUINFO ]; then
	echo "Can't read $CPUINFO: Permission denied" 1>&2
	exit 1;
fi

CPUUTL=`cat  ${CPUINFO} | awk '
{
        if ($1 == "bogomips" || $1 == "BogoMIPS") {
		sum += $3;
	}
}
END {
	print(sum * 25);
}'`

cat ${FRSHD} | awk -v totunits="$CPUUTL" -v verbose="$VERBOSE" -v xml="$XML" '
BEGIN {
        sum = 0;
	fail = 0;
	weight=-1
	id=-1
	getline
	if ($1 == "Version:"){
		getline;
	}
	for (i = 0; i < NF; i++) {
		if ($i == "weight") {
			weight = i;
		}
		if ($i == "id") {
			id = i;
		}
	}
	if (weight == -1) {
		print("ERROR: Unknown format of '$FRSHD' column: weight not found");
		fail = 1
		exit
	}
	if (id == -1) {
		print("ERROR: Unknown format of '$FRSHD' column: id not found");
		fail = 1;
		exit
	}
	if (verbose) {
		print("veid\t\tunits");
		print("-----------------------");
	}
}
{
	if ($1 == 0 && $id != 0) {
		if ($weight){
			units = int(500000/$weight);
		} else {
			units = 500000;
		}
		if (verbose) {
			if ($id == 2147483647) {
				print("0\t\t" units);
			} else {
				print($id "\t\t" units);
			}
		}
		sum += units;
	}
}
END {
	if (fail)
		exit 1
	if (xml) {
		print("<cpu><utilization>" sum / totunits "</utilization></cpu>");
		exit 0;
	}
	print("Current CPU utilization: " sum);
	print("Power of the node: " int(totunits));
	if (sum > totunits) {
		print("Warning: hardware node is overcommited");
	}
}'