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#!/usr/bin/perl -T
use strict;
use warnings;
use VServer;
use Nagios::Plugin;
use POSIX;
our $VERSION = '1.5';
sub init_nagios_plugin() {
my $plugin = Nagios::Plugin->new(
usage => "Usage: %s [-h|--help] [-w|--warnings=...] " .
"[-c|--critical=...] vserver-name",
version => $VERSION,
blurb => "This plugin could monitor the load of single vserver guests."
);
$plugin->add_arg(
spec => 'w|warning=s',
help => "Warning thresholds for the differnet memory types (VM, RSS, ANON, LOCK).",
label => "RANGE[,RANGE[,RANGE[,RANGE]]]",
);
$plugin->add_arg(
spec => 'c|critical=s',
help => "Critical thresholds for the differnet memory types (VM, RSS, ANON, LOCK).",
label => "RANGE[,RANGE[,RANGE[,RANGE]]]",
);
return $plugin;
}
sub parse_thresholds($) {
my $arg = shift;
if ($arg) {
if ($arg =~ m/([-:@~0-9]+),([-:@~0-9]+),([-:@~0-9]+),([-:@~0-9]+)/) {
return ($1, $2, $3, $4);
}
if ($arg =~ m/([-:@~0-9]+),([-:@~0-9]+),([-:@~0-9]+)/) {
return ($1, $2, $3, $3);
}
if ($arg =~ m/([-:@~0-9]+),([-:@~0-9]+)/) {
return ($1, $2, $2, $2);
}
if ($arg =~ m/([-:@~0-9]+)/) {
return ($1, $1, $1, $1);
}
}
return ();
}
sub get_mem($$) {
my $n = shift;
my $context = shift;
my $proc = VServer::get_proc_dir($context);
$n->nagios_exit(UNKNOWN, "vserver not running") unless($proc);
my $ps = POSIX::sysconf(&POSIX::_SC_PAGESIZE);
$n->nagios_exit(UNKNOWN, "unable to determine pagesize") unless $ps;
open(my $limit, "<", "$proc/limit") ||
$n->nagios_exit(UNKNOWN, "could not open '$proc/limit'");
my @mem = undef;
while (<$limit>) {
if ($_ =~ m/^VM:\s*([0-9]+)\s/) {
$mem[0] = $1 * $ps;
}
elsif ($_ =~ m/RSS:\s*([0-9]+)\s/) {
$mem[1] = $1 * $ps;
}
elsif ($_ =~ m/ANON:\s*([0-9]+)\s/) {
$mem[2] = $1 * $ps;
}
elsif ($_ =~ m/VML:\s*([0-9]+)\s/) {
$mem[3] = $1 * $ps;
}
}
close($limit);
return @mem;
}
# fix taint mode
if ($0 =~ m/(\w[\w\/]*\w)/) {
$ENV{'NAGIOS_PLUGIN'} = $1;
}
my $n = init_nagios_plugin();
$n->getopts();
alarm $n->opts->timeout;
my (%warn, %crit);
($warn{'VM'}, $warn{'RSS'}, $warn{'ANON'}, $warn{'VML'}) = parse_thresholds($n->opts->w);
($crit{'VM'}, $crit{'RSS'}, $crit{'ANON'}, $crit{'VML'}) = parse_thresholds($n->opts->c);
my $vserver = shift;
unless ($vserver) {
$n->nagios_exit(UNKNOWN, "vserver name required");
}
my $context = VServer::get_context_id($vserver);
unless ($context) {
$n->nagios_exit(UNKNOWN, "vserver '$vserver' not found");
}
my @mem = get_mem($n, $context);
if (@mem) {
my %values;
my %desc;
($values{'VM'}, $values{'RSS'}, $values{'ANON'}, $values{'VML'}) = @mem;
%desc = (
VM => 'virtual memory',
RSS => 'resident set size',
ANON => 'anonymous memory',
VML => 'locked memory',
);
my @status = [ UNKNOWN ];
my $output = "";
for my $mem (qw( VM RSS ANON VML )) {
$n->add_perfdata(label => $mem,
value => $values{$mem},
min => 0,
warning => $warn{$mem},
critical => $crit{$mem},
);
push(@status,
$n->check_threshold(check => $values{$mem},
warning => $warn{$mem},
critical => $crit{$mem},
)
);
$values{$mem} = int(($values{$mem} / 1024) / 1024);
$output .= " - $desc{$mem}: $values{$mem}MB";
}
$n->nagios_exit($n->max_state(@status), "used memory$output");
}
$n->nagios_exit(UNKNOWN, 'unable to parse memory statistics');
|
