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|
#!/usr/bin/perl -T
use strict;
use warnings;
use VServer;
use Nagios::Plugin;
use Nagios::Plugin::Functions;
our $VERSION = '2.1';
our %desc = (
vm => 'virtual memory',
rss => 'resident set size',
anon => 'anonymous memory',
vml => 'locked memory',
);
sub init_nagios_plugin() {
my $plugin = Nagios::Plugin->new(
usage => "Usage: %s [-h|--help] [-w|--warnings=...] " .
"[-c|--critical=...] [-d|--domain=...] " .
"[-s|--service=...] [vserver-name]",
version => $VERSION,
blurb => "This plugin could monitor the memory of vserver guests."
);
$plugin->add_arg(
spec => 'w|warning=s',
help => "Warning thresholds for the different memory types (VM, RSS, ANON, LOCK).",
label => "RANGE[,RANGE[,RANGE[,RANGE]]]",
);
$plugin->add_arg(
spec => 'c|critical=s',
help => "Critical thresholds for the different memory types (VM, RSS, ANON, LOCK).",
label => "RANGE[,RANGE[,RANGE[,RANGE]]]",
);
$plugin->add_arg(
spec => 'd|domain=s',
help => 'Domainname to append in bulk mode or to stip ' .
'in single host mode.',
label => "DOMAIN",
);
$plugin->add_arg(
spec => 's|service=s',
help => 'Name of the service, as defined in the config of ' .
'the monitoring server. (default: ' .
Nagios::Plugin::Functions::get_shortname() . ')',
label => 'SERVICE',
);
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 undef;
}
sub output_results($$$$) {
my $n = shift;
my $name = shift;
my $statuses = shift;
my $output = shift;
my $service = $ENV{NAGIOS_PLUGIN};
my $status = $n->max_state(@{$statuses});
$status = Nagios::Plugin::Functions::UNKNOWN unless
defined $status && exists $Nagios::Plugin::Functions::STATUS_TEXT{$status};
my $result = $Nagios::Plugin::Functions::STATUS_TEXT{$status};
my $perf = $n->all_perfoutput();
print "$name\t$service\t$status\t$result - used memory$output | $perf\n\x17";
}
sub handle_vserver($$$;$$) {
my $id = shift;
my $warn = shift;
my $crit = shift;
my $name = shift;
my $domain = shift;
my $n = init_nagios_plugin();
my $mem = VServer::get_mem($id);
if ($mem) {
my @status = [ UNKNOWN ];
my $output = "";
for my $key (qw(vm rss anon vml)) {
$n->add_perfdata(label => $key,
value => $mem->{$key},
warning => $warn->{$key},
critical => $crit->{$key},
min => 0,
);
push(@status,
$n->check_threshold(check => $mem->{$key},
warning => $warn->{$key},
critical => $crit->{$key}
)
);
my $mb = sprintf "%.2f", ($mem->{$key} / 1024) / 1024;
$output .= " - $desc{$key}: ${mb}MB";
}
if ($name) {
$n->nagios_exit($n->max_state(@status), "used memory$output");
}
else {
$name = VServer::get_name($id);
output_results($n, "$name$domain", \@status, $output);
}
}
}
# fix taint mode
$ENV{PATH} = undef;
$ENV{'NAGIOS_PLUGIN'} = $1 if ($0 =~ m/(\w[\w\/]*\w)/);
$ENV{'NAGIOS_PLUGIN'} = Nagios::Plugin::Functions::get_shortname();
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);
$ENV{'NAGIOS_PLUGIN'} = $1 if ($n->opts->s && $n->opts->s =~ m/^(.+)$/);
my $domain = '';
$domain = ('.' . $n->opts->d) if $n->opts->d;
if (my $vserver = shift) {
if (defined $domain) {
$domain = quotemeta $domain;
$vserver =~ s/$domain$//;
}
my $context = VServer::get_context_id_by_name($vserver);
unless ($context) {
$n->nagios_exit(UNKNOWN, "vserver '$vserver' not found");
}
handle_vserver($context, \%warn, \%crit, $vserver);
$n->nagios_exit(UNKNOWN, 'unable to parse memory statistics');
}
else {
for my $dir (glob("/proc/virtual/*/")) {
my $id = VServer::get_context_id_by_dir($dir);
handle_vserver($id, \%warn, \%crit, undef, $domain);
}
}
|
