root / plugins / disk / lvm_usage @ f051d108
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| 1 | 623e1ebb | Gabor Gombas | #! /usr/bin/perl -w |
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| 2 | |||
| 3 | =head1 NAME |
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| 4 | |||
| 5 | lvm_usage - Plugin to monitor usage of LVM volume groups |
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| 6 | |||
| 7 | =head1 CONFIGURATION |
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| 8 | |||
| 9 | Must be run as root: |
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| 10 | |||
| 11 | [lvm_usage] |
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| 12 | user root |
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| 13 | |||
| 14 | =head1 MAGIC MARKERS |
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| 15 | |||
| 16 | #%# family=auto |
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| 17 | #%# capabilities=autoconf |
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| 18 | |||
| 19 | =head1 AUTHOR |
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| 20 | |||
| 21 | Gábor Gombás <gombasg@sztaki.hu> |
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| 22 | |||
| 23 | =head1 LICENSE |
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| 24 | |||
| 25 | GPLv2 or later |
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| 26 | |||
| 27 | =cut |
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| 28 | |||
| 29 | use strict; |
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| 30 | use Munin::Plugin; |
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| 31 | use Carp; |
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| 32 | |||
| 33 | need_multigraph(); |
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| 34 | |||
| 35 | if ($ARGV[0] and $ARGV[0] eq 'autoconf') {
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| 36 | if (-c "/dev/mapper/control") {
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| 37 | print "yes\n"; |
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| 38 | } |
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| 39 | else {
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| 40 | print "no (/dev/mapper/control is missing)\n"; |
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| 41 | } |
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| 42 | exit 0; |
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| 43 | } |
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| 44 | |||
| 45 | my %vgs; |
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| 46 | |||
| 47 | open(VGS, "vgs --units b --nosuffix --noheadings -o vg_name,vg_size,vg_free |") |
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| 48 | or croak("Failed to run 'lvs': " . $!);
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| 49 | while (my $line = <VGS>) {
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| 50 | chomp $line; |
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| 51 | $line =~ s/^\s+//; |
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| 52 | my ($vg_name, $vg_size, $vg_free) = split(/\s+/, $line); |
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| 53 | $vgs{$vg_name}->{size} = $vg_size unless $vgs{$vg_name}->{size};
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| 54 | $vgs{$vg_name}->{free} = $vg_free unless $vgs{$vg_name}->{free};
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| 55 | $vgs{$vg_name}->{lvs} = {};
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| 56 | } |
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| 57 | close VGS; |
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| 58 | |||
| 59 | open(LVS, "lvs --units b --nosuffix --noheadings -o vg_name,lv_name,lv_size |") |
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| 60 | or croak("Failed to run 'lvs': " . $!);
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| 61 | while (my $line = <LVS>) {
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| 62 | chomp $line; |
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| 63 | $line =~ s/^\s+//; |
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| 64 | my ($vg_name, $lv_name, $lv_size) = split(/\s+/, $line); |
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| 65 | $vgs{$vg_name}->{lvs}->{$lv_name} = $lv_size;
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| 66 | } |
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| 67 | close LVS; |
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| 68 | |||
| 69 | if ($ARGV[0] and $ARGV[0] eq 'config') {
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| 70 | print "multigraph lvm_usage\n"; |
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| 71 | print "graph_title LVM volume group usage\n"; |
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| 72 | print "graph_args --base 1024 --lower-limit 0 --upper-limit 100\n"; |
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| 73 | print "graph_vlabel %\n"; |
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| 74 | print "graph_category disk\n"; |
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| 75 | print "graph_order " . join(' ', map { clean_fieldname($_) } (sort keys %vgs)) . "\n";
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| 76 | for my $vg (sort keys %vgs) {
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| 77 | my $id = clean_fieldname($vg); |
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| 78 | print "$id.label $vg\n"; |
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| 79 | print "$id.type GAUGE\n"; |
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| 80 | print "$id.draw LINE2\n"; |
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| 81 | } |
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| 82 | |||
| 83 | for my $vg (sort keys %vgs) {
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| 84 | my $id = clean_fieldname($vg); |
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| 85 | |||
| 86 | print "multigraph lvm_usage.$id\n"; |
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| 87 | print "graph_title Volume group usage ($vg)\n"; |
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| 88 | print "graph_args --base 1024 --lower-limit 0\n"; |
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| 89 | print "graph_vlabel bytes\n"; |
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| 90 | print "graph_category disk\n"; |
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| 91 | print "__free.label Free space\n"; |
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| 92 | print "__free.draw AREA\n"; |
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| 93 | |||
| 94 | foreach my $lv (sort keys %{$vgs{$vg}->{lvs}}) {
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| 95 | my $id = clean_fieldname($lv); |
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| 96 | print "$id.label $lv\n"; |
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| 97 | print "$id.draw STACK\n"; |
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| 98 | } |
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| 99 | } |
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| 100 | |||
| 101 | exit 0; |
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| 102 | } |
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| 103 | |||
| 104 | print "multigraph lvm_usage\n"; |
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| 105 | for my $vg (sort keys %vgs) {
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| 106 | my $id = clean_fieldname($vg); |
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| 107 | my $used = $vgs{$vg}->{'size'} - $vgs{$vg}->{'free'};
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| 108 | print "$id.value " . int($used * 100 / $vgs{$vg}->{'size'}) . "\n";
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| 109 | } |
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| 110 | |||
| 111 | for my $vg (sort keys %vgs) {
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| 112 | my $id = clean_fieldname($vg); |
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| 113 | print "multigraph lvm_usage.$id\n"; |
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| 114 | print "__free.value " . $vgs{$vg}->{free} . "\n";
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| 115 | |||
| 116 | foreach my $lv (sort keys %{$vgs{$vg}->{lvs}}) {
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| 117 | my $id = clean_fieldname($lv); |
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| 118 | print "$id.value " . $vgs{$vg}->{lvs}->{$lv} . "\n";
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| 119 | } |
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| 120 | } |