2
0
mirror of https://github.com/munin-monitoring/contrib.git synced 2018-11-08 00:59:34 +01:00
contrib-munin/plugins/disk/raid
Dr. Nagy Elemér Károly b805f7a64f Fixed typo in comment
2016-05-16 22:11:31 +00:00

135 lines
4.2 KiB
Perl
Executable File

#!/usr/bin/perl -w
#
# (c) 2007 Nathan Rutman nathan@clusterfs.com
#
# Plugin to monitor RAID status
#
# Results are % of healthy drives in a raid device
# and % rebuilt of devices that are resyncing.
#
#%# family=contrib
#%# capabilities=autoconf
if ($ARGV[0] and $ARGV[0] eq "autoconf") {
if (-r "/proc/mdstat" and `grep md /proc/mdstat`) {
print "yes\n";
exit 0;
} else {
print "no RAID devices\n";
exit 1;
}
}
if ( $ARGV[0] and $ARGV[0] eq "config" ) {
print "graph_title RAID status\n";
print "graph_category disk\n";
print "graph_info This graph monitors RAID disk health. Values are percentage of healthy drives in each raid group. Degraded devices are marked Critical.\n";
print "graph_args --base 1000 -l 0\n";
print "graph_vlabel % healthy/rebuilt\n";
print "graph_scale no\n";
}
open(my $mdstat, "/proc/mdstat");
my(@text) = <$mdstat>;
# contents of <$mdstat> may be changed at next reading, so fetch the contents at a time
close($mdstat);
my($devinfo_re, $devstat_re, $action_re) = (
'(md\d+)\s+:\s+active\s+(\(read-only\)\s+|\(auto-read-only\)\s+|)(\w+)\s+(.*)',
'.*\[(\d+)\/(\d+)]\s+\[(\w+)]',
'.*(reshape|check|resync|recovery)\s*=\s*(\d+\.\d+%|\w+)(.*finish=(.*min))?',
);
# Interestingly, swap is presented as "active (auto-read-only)"
# and mdadm has '--readonly' option to make the array 'active (read-only)'
my($dev, $ro, $type, $members, $nmem, $nact, $status, $action, $proc, $minute);
while (@text) {
my $line = shift @text;
if ($line =~ /$devinfo_re/) {
# first line should like "active raid1 sda1[0] sdc1[2] sdb1[1]"
$dev = $1;
$ro = $2 || '';
$type = $3;
$members = $4;
$line = shift @text;
if ($line =~ /$devstat_re/) {
# second line should like "123456 blocks super 1.2 [2/2] [UU]"
$nmem = $1;
$nact = $2;
$status = $3;
}
else {
# second line did not exist on /proc/mdstat
next;
}
$line = shift @text;
if ($line =~ /$action_re/) {
# third line should like " [==>..................] check = 10.0% (12345/123456) finish=123min speed=12345/sec"
# this line will appear only when the array is in action
$action = $1;
my $percent = $2;
$minute = $4 || '';
if ($percent =~ /(\d+\.\d+)%/) {
$proc = $1;
}
else {
# 'resync=DELAYED' or 'resync=PENDING'
$action .= " ($percent)";
$proc = -1;
}
}
else {
# array is not in action
$action = 'idle';
$minute = '';
unshift(@text, $line);
}
}
else {
# skip until first line is found
next;
}
if ( $ARGV[0] and $ARGV[0] eq "config" ) {
print "$dev.label $dev\n";
print "$dev.info $type $ro$members\n";
# 100: means less than 100
# Because of an unfound bug, sometimes reported as 99.XX even when OS reports 100.
print "$dev.critical 98:\n";
print $dev, "_rebuild.label $dev reshape/recovery\n";
print $dev, "_rebuild.info $action $minute\n";
# Because of an unfound bug, sometimes reported as 99.XX even when OS reports 100.
print $dev, "_rebuild.critical 98:\n";
print $dev, "_check.label $dev check/resync \n";
print $dev, "_check.info $action $minute\n";
} else {
my $pct = 100 * $nact / $nmem;
my $rpct = 100;
my $cpct = 100;
if ($action =~ /reshape|recovery/) {
$rpct = $proc;
$cpct = 0; # check/resync is not done
}
elsif ($action =~ /check|resync/) {
if ($proc < 0) {
# array is on DELAYED or PENDING, further info is unknown
$rpct = 0;
$cpct = 0;
}
else {
# reshape/recovery was done, $rpct => 100
$cpct = $proc;
}
}
print "$dev.value $pct\n";
print $dev, "_rebuild.value $rpct\n";
print $dev, "_check.value $cpct\n";
}
}
exit 0;