121 lines
2.7 KiB
Plaintext
121 lines
2.7 KiB
Plaintext
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#! /usr/bin/perl -w
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=head1 NAME
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lvm_usage - Plugin to monitor usage of LVM volume groups
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=head1 CONFIGURATION
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Must be run as root:
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[lvm_usage]
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user root
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=head1 MAGIC MARKERS
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#%# family=auto
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#%# capabilities=autoconf
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=head1 AUTHOR
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Gábor Gombás <gombasg@sztaki.hu>
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=head1 LICENSE
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GPLv2 or later
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=cut
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use strict;
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use Munin::Plugin;
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use Carp;
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need_multigraph();
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if ($ARGV[0] and $ARGV[0] eq 'autoconf') {
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if (-c "/dev/mapper/control") {
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print "yes\n";
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}
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else {
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print "no (/dev/mapper/control is missing)\n";
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}
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exit 0;
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}
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my %vgs;
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open(VGS, "vgs --units b --nosuffix --noheadings -o vg_name,vg_size,vg_free |")
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or croak("Failed to run 'lvs': " . $!);
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while (my $line = <VGS>) {
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chomp $line;
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$line =~ s/^\s+//;
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my ($vg_name, $vg_size, $vg_free) = split(/\s+/, $line);
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$vgs{$vg_name}->{size} = $vg_size unless $vgs{$vg_name}->{size};
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$vgs{$vg_name}->{free} = $vg_free unless $vgs{$vg_name}->{free};
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$vgs{$vg_name}->{lvs} = {};
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}
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close VGS;
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open(LVS, "lvs --units b --nosuffix --noheadings -o vg_name,lv_name,lv_size |")
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or croak("Failed to run 'lvs': " . $!);
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while (my $line = <LVS>) {
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chomp $line;
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$line =~ s/^\s+//;
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my ($vg_name, $lv_name, $lv_size) = split(/\s+/, $line);
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$vgs{$vg_name}->{lvs}->{$lv_name} = $lv_size;
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}
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close LVS;
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if ($ARGV[0] and $ARGV[0] eq 'config') {
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print "multigraph lvm_usage\n";
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print "graph_title LVM volume group usage\n";
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print "graph_args --base 1024 --lower-limit 0 --upper-limit 100\n";
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print "graph_vlabel %\n";
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print "graph_category disk\n";
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print "graph_order " . join(' ', map { clean_fieldname($_) } (sort keys %vgs)) . "\n";
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for my $vg (sort keys %vgs) {
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my $id = clean_fieldname($vg);
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print "$id.label $vg\n";
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print "$id.type GAUGE\n";
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print "$id.draw LINE2\n";
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}
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for my $vg (sort keys %vgs) {
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my $id = clean_fieldname($vg);
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print "multigraph lvm_usage.$id\n";
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print "graph_title Volume group usage ($vg)\n";
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print "graph_args --base 1024 --lower-limit 0\n";
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print "graph_vlabel bytes\n";
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print "graph_category disk\n";
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print "__free.label Free space\n";
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print "__free.draw AREA\n";
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foreach my $lv (sort keys %{$vgs{$vg}->{lvs}}) {
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my $id = clean_fieldname($lv);
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print "$id.label $lv\n";
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print "$id.draw STACK\n";
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}
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}
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exit 0;
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}
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print "multigraph lvm_usage\n";
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for my $vg (sort keys %vgs) {
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my $id = clean_fieldname($vg);
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my $used = $vgs{$vg}->{'size'} - $vgs{$vg}->{'free'};
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print "$id.value " . int($used * 100 / $vgs{$vg}->{'size'}) . "\n";
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}
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for my $vg (sort keys %vgs) {
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my $id = clean_fieldname($vg);
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print "multigraph lvm_usage.$id\n";
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print "__free.value " . $vgs{$vg}->{free} . "\n";
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foreach my $lv (sort keys %{$vgs{$vg}->{lvs}}) {
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my $id = clean_fieldname($lv);
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print "$id.value " . $vgs{$vg}->{lvs}->{$lv} . "\n";
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}
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}
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