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