/usr/share/perl5/Collectd/Plugins/OpenVZ.pm is in collectd-core 5.5.1-1build2.
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 $vzctl = '/usr/sbin/vzctl';
my $vzlist = '/usr/sbin/vzlist';
# Since OpenVZ is container based, all guests see all the host's CPUs,
# and would report the same data. So we disable CPU by default.
my $enable_interface = 1;
my $enable_cpu = 0;
my $enable_df = 1;
my $enable_load = 1;
my $enable_processes = 1;
my $enable_users = 1;
# We probably don't care about loopback transfer
my @ignored_interfaces = ( "lo" );
sub interface_read {
my ($veid, $name) = @_;
my @rx_fields = qw(if_octets if_packets if_errors drop fifo frame compressed multicast);
my @tx_fields = qw(if_octets if_packets if_errors drop fifo frame compressed);
my %v = _build_report_hash($name);
my @lines = `$vzctl exec $veid cat /proc/net/dev`;
for my $line (@lines) {
# skip explanatory text
next if $line !~ /:/;
$line =~ s/^\s+|\s+$//g;
my ($iface, %rx, %tx);
# read /proc/net/dev fields
($iface, @rx{@rx_fields}, @tx{@tx_fields}) = split /[: ]+/, $line;
# Skip this interface if it is in the ignored list
next if grep { $iface eq $_ } @ignored_interfaces;
for my $instance (qw(if_octets if_packets if_errors)) {
plugin_dispatch_values({
'plugin' => 'interface',
'plugin_instance' => $iface,
'type' => $instance,
'values' => [ $rx{$instance}, $tx{$instance} ],
%v,
});
}
}
}
sub cpu_read {
my $veid = shift;
my $name = shift;
my ($key, $val, $i, @lines, @counters);
my @cpu_instances = ('user', 'nice', 'system', 'idle', 'wait', 'interrupt', 'softirq', 'steal');
my $last_stat = {};
my %v = _build_report_hash($name);
$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);
}
}
}
sub df_read {
my $veid = shift;
my $name = shift;
my ($key, $val, @lines, @parts);
my %v = _build_report_hash($name);
$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);
}
}
sub load_read {
my $veid = shift;
my $name = shift;
my ($key, $val, @lines, @parts);
my %v = _build_report_hash($name);
$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);
}
sub processes_read {
my $veid = shift;
my $name = shift;
my ($key, $val, @lines);
my %v = _build_report_hash($name);
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);
}
}
sub users_read {
my $veid = shift;
my $name = shift;
my ($key, $val, @lines);
my %v = _build_report_hash($name);
$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);
}
sub _build_report_hash {
my $name = shift;
return (time => time(), interval => plugin_get_interval(), host => $name);
}
sub openvz_read {
my (@veids, $veid, $name);
@veids = map { s/ //g; $_; } split(/\n/, `$vzlist -Ho veid`);
foreach $veid (@veids) {
($name = `$vzlist -Ho name $veid`) =~ s/^\s*(.*?)\s*$/$1/;
($name = `$vzlist -Ho hostname $veid`) =~ s/^\s*(.*?)\s*$/$1/ if($name =~ /^-$/);
$name = $veid if ($name =~ /^-$/);
if($enable_interface) {
interface_read($veid, $name);
}
if($enable_cpu) {
cpu_read($veid, $name);
}
if($enable_df) {
df_read($veid, $name);
}
if($enable_load) {
load_read($veid, $name);
}
if($enable_processes) {
processes_read($veid, $name);
}
if($enable_users) {
users_read($veid, $name);
}
return 1;
}
}
plugin_register(TYPE_READ, 'OpenVZ', 'openvz_read');
return 1;
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