nagios check for linux software raid

check_raid

#!/usr/bin/perl -w
# vim:ts=4
#
# Check RAID status.  Look for any known types
# of RAID configurations, and check them all.
# Return CRITICAL if in a DEGRADED state, since
# if the whole array has failed you'll have already noticed it!
# Return UNKNOWN if there are no RAID configs that can be found.
# Return WARNING if rebuilding or initialising
#
# S Shipway, university of auckland
#
# Thanks to M Carmier for megaraid section
#
# Version 1.1 : IPS; Solaris, AIX, Linux software RAID; megaide
# Version 2.0 : Added megaraid, mpt (serveraid), aacli (serveraid)

use strict;
use Getopt::Long;
use vars qw($opt_v $opt_d $opt_h $opt_W $opt_S);
my (%ERRORS) = ( OK => 0, WARNING => 1, CRITICAL => 2, UNKNOWN => 3, WARN => 1, CRIT => 2 );
my ($VERSION) = "2.0";
my ( $message, $status );
my (@ignore);

#####################################################################
sub print_usage () {
    print "Usage: check_raid [list of devices to ignore]\n";
    print "       check_raid -v\n";
    print "       check_raid -h\n";
}

sub print_help () {
    print "check_raid, Revision: $VERSION \n";
    print "Copyright (c) 2004-2006 S Shipway
This plugin reports the current server's RAID status
";
    print_usage();
}

#####################################################################
# return true if parameter is not in ignore list
sub valid($) {
    my ($v) = $_[0];
    $v = lc $v;
    foreach (@ignore) { return 0 if ( ( lc $_ ) eq $v ); }
    return 1;
}
#####################################################################
sub check_mdstat {
    my ($l);
    my ( $s, $n, $f );

    open MDSTAT, "</proc/mdstat" or return;
    while ( $l = <MDSTAT> ) {
        if ( $l =~ /^(\S+)\s+:/ ) { $n = $1; $f = ''; next; }
        if ( $l =~ /(\S+)\[\d+\]\(F\)/ ) { $f = $1; next; }
        if ( $l =~ /\s*.*\[([U_]+)\]/ ) {
            $s = $1;
            next if ( !valid($n) );
            if ( $s =~ /_/ ) {
                $status = $ERRORS{CRITICAL};
                $message .= "md:$n:$f:$s ";
            }
            else {
                $message .= "md:$n:$s ";
            }
        }
    }
    close MDSTAT;
}
#####################################################################
$ENV{'BASH_ENV'} = '';
$ENV{'ENV'}      = '';

Getopt::Long::Configure('bundling');
GetOptions(
    "v"        => \$opt_v,
    "version"  => \$opt_v,
    "h"        => \$opt_h,
    "help"     => \$opt_h,
    "d"        => \$opt_d,
    "debug"    => \$opt_d,
    "W"        => \$opt_W,
    "warnonly" => \$opt_W
);

@ignore = @ARGV if (@ARGV);

if ($opt_v) {
    print "check_raid Revision: $VERSION\n";
    exit $ERRORS{'OK'};
}
if ($opt_h) { print_help(); exit $ERRORS{'OK'}; }
if ($opt_W) {
    $ERRORS{CRITICAL} = $ERRORS{WARNING};
}

$status  = $ERRORS{OK};
$message = '';

check_mdstat if ( -f "/proc/mdstat" );

if ($message) {
    if ( $status == $ERRORS{OK} ) {
        print "OK: ";
    }
    elsif ( $status == $ERRORS{WARNING} ) {
        print "WARNING: ";
    }
    elsif ( $status == $ERRORS{CRITICAL} ) {
        print "CRITICAL: ";
    }
    print "$message\n";
}
else {
    $status = $ERRORS{UNKNOWN};
    print "No RAID configuration found.\n";
}
exit $status;