Plugin:check linux raid


 * 1) ! /usr/bin/perl -w


 * 1) Copyright (c) 2002 ISOMEDIA, Inc.
 * 2) originally written by Steve Milton
 * 3) later updates by sean finney 
 * 4) This program is free software; you can redistribute it and/or modify
 * 5) it under the terms of the GNU General Public License as published by
 * 6) the Free Software Foundation; either version 2 of the License, or
 * 7) (at your option) any later version.
 * 8) This program is distributed in the hope that it will be useful,
 * 9) but WITHOUT ANY WARRANTY; without even the implied warranty of
 * 10) MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * 11) GNU General Public License for more details.
 * 12) You should have received a copy of the GNU General Public License
 * 13) along with this program; if not, write to the Free Software
 * 14) Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 15) Usage:   check_raid [raid-name]
 * 16) Example: check_raid md0
 * 17) 	 WARNING md0 status=[UUU_U], recovery=46.4%, finish=123.0min
 * 1) Usage:   check_raid [raid-name]
 * 2) Example: check_raid md0
 * 3) 	 WARNING md0 status=[UUU_U], recovery=46.4%, finish=123.0min
 * 1) 	 WARNING md0 status=[UUU_U], recovery=46.4%, finish=123.0min

use strict; use lib "/usr/lib/nagios/plugins"; use utils qw(%ERRORS);

if ($^O ne 'linux') { print "This plugin only applicable on Linux.\n"; exit $ERRORS{'UNKNOWN'}; }
 * 1) die with an error if we're not on Linux

sub max_state($$){ my ($a, $b) = @_; if ($a eq "CRITICAL" || $b eq "CRITICAL") { return "CRITICAL"; } elsif ($a eq "WARNING" || $b eq "WARNING") { return "WARNING"; } elsif ($a eq "OK" || $b eq "OK") { return "OK"; } elsif ($a eq "UNKNOWN" || $b eq "UNKNOWN") { return "UNKNOWN"; } elsif ($a eq "DEPENDENT" || $b eq "DEPENDENT") { return "DEPENDENT"; } return "UNKNOWN"; }

my $nextdev; if(defined $ARGV[0]) { $nextdev = shift; } else { $nextdev = "md[0-9]+"; }

my $code = "UNKNOWN"; my $msg = ""; my %status; my %recovery; my %finish; my %active; my %devices;

while(defined $nextdev){ open (MDSTAT, "< /proc/mdstat") or die "Failed to open /proc/mdstat"; my $device = undef; while() { if (defined $device) { if (/(\[[_U]+\])/) {				$status{$device} = $1;			} elsif (/recovery = (.*?)\s/) { 				$recovery{$device} = $1;				($finish{$device}) = /finish=(.*?min)/;				$device=undef;			} elsif (/^\s*$/) {				$device=undef;			}		} elsif (/^($nextdev)\s*:/) {			$device=$1;			$devices{$device}=$device;			if (/\sactive/) {				$status{$device} = ''; # Shall be filled later if available				$active{$device} = 1;			}		}	}	$nextdev = shift; }

foreach my $k (sort keys %devices){ if (!exists($status{$k})) { $msg .= sprintf " %s inactive with no status information.", $devices{$k}; $code = max_state($code, "CRITICAL"); } elsif ($status{$k} =~ /_/) { if (defined $recovery{$k}) { $msg .= sprintf " %s status=%s, recovery=%s, finish=%s.", $devices{$k}, $status{$k}, $recovery{$k}, $finish{$k}; $code = max_state($code, "WARNING"); } else { $msg .= sprintf " %s status=%s.", $devices{$k}, $status{$k}; $code = max_state($code, "CRITICAL"); }	} elsif ($status{$k} =~ /U+/) { $msg .= sprintf " %s status=%s.", $devices{$k}, $status{$k}; $code = max_state($code, "OK"); } else { if ($active{$k}) { $msg .= sprintf " %s active with no status information.", $devices{$k}; $code = max_state($code, "OK"); } else { # This should't run anymore, but is left as a catch-all $msg .= sprintf " %s does not exist.\n", $devices{$k}; $code = max_state($code, "CRITICAL"); }	} }

print $code, $msg, "\n"; exit ($ERRORS{$code});