/usr/share/perl5/Collectd/Plugins/OpenVZ.pm is in collectd-core 5.4.1-6+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# collectd - OpenVZ collectd plugin
# Copyright (C) 2009 Jonathan Kolb
#
# This program 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 St, Fifth Floor, Boston, MA 02110-1301 USA
#
# Author:
# Jonathan Kolb <jon at b0g.us>
#
package Collectd::Plugins::OpenVZ;
use strict;
use warnings;
use Collectd qw( :all );
my @cpu_instances = ('user', 'nice', 'system', 'idle', 'wait', 'interrupt', 'softirq', 'steal');
my @if_instances = ('if_octets', 'if_packets', 'if_errors');
my $vzctl = '/usr/sbin/vzctl';
my $vzlist = '/usr/sbin/vzlist';
my $last_stat = {};
sub openvz_read
{
my %v = (time => time(), interval => plugin_get_interval());
my (@veids, $veid, $name, $key, $val, $i, @lines, @parts, @counters);
@veids = map { s/ //g; $_; } split(/\n/, `$vzlist -Ho veid`);
foreach $veid (@veids)
{
($name = `$vzlist -Ho name $veid`) =~ s/^\s*(.*?)\s*$/$1/;
$name = $veid if ($name =~ /^-$/);
$v{'host'} = $name;
#####################################################################
# interface
$v{'plugin'} = 'interface';
delete $v{'plugin_instance'};
@lines = split(/\n/, `$vzctl exec $veid cat /proc/net/dev`);
foreach (@lines)
{
next if (!/:/);
@parts = split(/:/);
($key = $parts[0]) =~ s/^\s*(.*?)\s*$/$1/;
($val = $parts[1]) =~ s/^\s*(.*?)\s*$/$1/;
@counters = split(/ +/, $val);
$v{'type_instance'} = $key;
for ($key = 0; $key <= $#if_instances; ++$key)
{
$v{'type'} = $if_instances[$key];
$v{'values'} = [ $counters[$key], $counters[$key + 8] ];
plugin_dispatch_values(\%v);
}
}
#####################################################################
# cpu
$v{'plugin'} = 'cpu';
$v{'type'} = 'cpu';
$i = 0;
@lines = split(/\n/, `$vzctl exec $veid cat /proc/stat`);
foreach (@lines)
{
next if (!/^cpu[0-9]/);
@counters = split(/ +/);
shift(@counters);
# Remove once OpenVZ bug 1376 is resolved
if (48485 == $counters[3])
{
$counters[3] = $last_stat->{"$veid-$i-idle"};
$counters[4] = $last_stat->{"$veid-$i-wait"};
}
else
{
$last_stat->{"$veid-$i-idle"} = $counters[3];
$last_stat->{"$veid-$i-wait"} = $counters[4];
}
$v{'plugin_instance'} = $i++;
for ($key = 0; $key <= $#counters; ++$key)
{
$v{'type_instance'} = $cpu_instances[$key];
$v{'values'} = [ $counters[$key] ];
plugin_dispatch_values(\%v);
}
}
#####################################################################
# df
$v{'plugin'} = 'df';
delete $v{'plugin_instance'};
$v{'type'} = 'df';
$val = join(' ', map { (split)[1] } split(/\n/, `$vzctl exec $veid cat /proc/mounts`));
@lines = split(/\n/, `$vzctl exec $veid stat -tf $val`);
foreach (@lines)
{
@parts = split(/ /);
next if (0 == $parts[7]);
$val = substr($parts[0], 1);
$val = 'root' if ($val =~ /^$/);
$val =~ s#/#-#g;
$v{'type_instance'} = $val;
$v{'values'} = [ $parts[5] * ($parts[6] - $parts[7]), $parts[5] * $parts[7] ];
plugin_dispatch_values(\%v);
}
#####################################################################
# load
$v{'plugin'} = 'load';
delete $v{'plugin_instance'};
$v{'type'} = 'load';
delete $v{'type_instance'};
@parts = split(/ +/, `$vzctl exec $veid cat /proc/loadavg`);
$v{'values'} = [ $parts[0], $parts[1], $parts[2] ];
plugin_dispatch_values(\%v);
#####################################################################
# processes
my $ps_states = { 'paging' => 0, 'blocked' => 0, 'zombies' => 0, 'stopped' => 0,
'running' => 0, 'sleeping' => 0 };
my $state_map = { 'R' => 'running', 'S' => 'sleeping', 'D' => 'blocked',
'Z' => 'zombies', 'T' => 'stopped', 'W' => 'paging' };
$v{'plugin'} = 'processes';
delete $v{'plugin_instance'};
$v{'type'} = 'ps_state';
@lines = map { (split)[2] } split(/\n/, `$vzctl exec $veid cat '/proc/[0-9]*/stat'`);
foreach $key (@lines)
{
++$ps_states->{$state_map->{$key}};
}
foreach $key (keys %{$ps_states})
{
$v{'type_instance'} = $key;
$v{'values'} = [ $ps_states->{$key} ];
plugin_dispatch_values(\%v);
}
#####################################################################
# users
$v{'plugin'} = 'users';
delete $v{'plugin_instance'};
$v{'type'} = 'users';
delete $v{'type_instance'};
@lines = split(/\n/, `$vzctl exec $veid w -h`);
$v{'values'} = [ scalar(@lines) ];
plugin_dispatch_values(\%v);
}
return 1;
}
plugin_register(TYPE_READ, 'OpenVZ', 'openvz_read');
return 1;
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