333 lines
10 KiB
Perl
333 lines
10 KiB
Perl
#!/usr/bin/perl -w
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# Check SMART status of ATA/SCSI disks, returning any usable metrics as perfdata.
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# For usage information, run ./check_smart -h
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#
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# This script was created under contract for the US Government and is therefore Public Domain
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#
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# Changes and Modifications
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# =========================
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# Feb 3, 2009: Kurt Yoder - initial version of script
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# Mar 3, 2010: Giles Westwood - add support for hardware raid interfaces
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use strict;
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use Getopt::Long;
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use File::Basename qw(basename);
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my $basename = basename($0);
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my $revision = '$Revision: 1.1 $';
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use lib '/usr/lib/nagios/plugins/';
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use utils qw(%ERRORS &print_revision &support &usage);
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$ENV{'PATH'}='/bin:/usr/bin:/sbin:/usr/sbin';
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$ENV{'BASH_ENV'}='';
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$ENV{'ENV'}='';
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use vars qw($opt_d $opt_debug $opt_h $opt_i $opt_v $opt_m);
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Getopt::Long::Configure('bundling');
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GetOptions(
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"debug" => \$opt_debug,
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"d=s" => \$opt_d, "device=s" => \$opt_d,
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"h" => \$opt_h, "help" => \$opt_h,
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"i=s" => \$opt_i, "interface=s" => \$opt_i,
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"m=s" => \$opt_m, "mode=s" => \$opt_m,
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"v" => \$opt_v, "version" => \$opt_v,
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);
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if ($opt_v) {
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print_revision($basename,$revision);
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exit $ERRORS{'OK'};
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}
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if ($opt_h) {
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print_help();
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exit $ERRORS{'OK'};
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}
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my ($device, $interface, $mode) = qw//;
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if ($opt_d) {
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unless($opt_i){
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print "must specify an interface for $opt_d using -i/--interface!\n\n";
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print_help();
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exit $ERRORS{'UNKNOWN'};
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}
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if (!$opt_i =~/3ware|cciss|areca/){
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if ( -b $opt_d){
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$device = $opt_d;
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}
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else{
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print "$opt_d is not a valid block device!\n\n";
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print_help();
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exit $ERRORS{'UNKNOWN'};
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}
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}
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else{
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$device = $opt_d;
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}
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if($opt_i =~
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/ata|scsi|3ware|cciss|areca|sat|marvell|usbsunplus|hpt|usbcypress|usbsunplus/){
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$interface = $opt_i;
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}
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else{
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print "invalid interface $opt_i for $opt_d!\n\n";
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print_help();
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exit $ERRORS{'UNKNOWN'};
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}
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}
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else{
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print "must specify a device!\n\n";
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print_help();
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exit $ERRORS{'UNKNOWN'};
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}
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if ($opt_m){
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if ($opt_m =~ /scsi/){
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$mode = 'scsi';
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}
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if ($opt_m =~ /ata/){
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$mode = 'ata';
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}
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}
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else{
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$mode = 'unused';
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}
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my $smart_command = '/usr/bin/sudo /usr/sbin/smartctl';
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my @error_messages = qw//;
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my $exit_status = 'OK';
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warn "###########################################################\n" if $opt_debug;
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warn "(debug) CHECK 1: getting overall SMART health status\n" if $opt_debug;
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warn "###########################################################\n\n\n" if $opt_debug;
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my $full_command = "$smart_command -d $interface -H $device";
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warn "(debug) executing:\n$full_command\n\n" if $opt_debug;
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my @output = `$full_command`;
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warn "(debug) output:\n@output\n\n" if $opt_debug;
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# parse ata output, looking for "health status: passed"
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my $found_status = 0;
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my $line_str = 'SMART overall-health self-assessment test result: '; # ATA SMART line
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my $ok_str = 'PASSED'; # ATA SMART OK string
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if ($interface eq 'scsi' || $mode eq 'scsi'){
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$line_str = 'SMART Health Status: '; # SCSI SMART line
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$ok_str = 'OK'; #SCSI SMART OK string
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}
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foreach my $line (@output){
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if($line =~ /$line_str(.+)/){
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$found_status = 1;
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warn "(debug) parsing line:\n$line\n\n" if $opt_debug;
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if ($1 eq $ok_str) {
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warn "(debug) found string '$ok_str'; status OK\n\n" if $opt_debug;
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}
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else {
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warn "(debug) no '$ok_str' status; failing\n\n" if $opt_debug;
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push(@error_messages, "Health status: $1");
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escalate_status('CRITICAL');
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}
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}
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}
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unless ($found_status) {
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push(@error_messages, 'No health status line found');
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escalate_status('UNKNOWN');
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}
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warn "###########################################################\n" if $opt_debug;
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warn "(debug) CHECK 2: getting silent SMART health check\n" if $opt_debug;
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warn "###########################################################\n\n\n" if $opt_debug;
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$full_command = "$smart_command -d $interface -q silent -A $device";
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warn "(debug) executing:\n$full_command\n\n" if $opt_debug;
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system($full_command);
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my $return_code = $?;
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warn "(debug) exit code:\n$return_code\n\n" if $opt_debug;
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if ($return_code & 0x01) {
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push(@error_messages, 'Commandline parse failure');
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escalate_status('UNKNOWN');
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}
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if ($return_code & 0x02) {
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push(@error_messages, 'Device could not be opened');
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escalate_status('UNKNOWN');
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}
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if ($return_code & 0x04) {
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push(@error_messages, 'Checksum failure');
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escalate_status('WARNING');
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}
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if ($return_code & 0x08) {
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push(@error_messages, 'Disk is failing');
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escalate_status('CRITICAL');
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}
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if ($return_code & 0x10) {
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push(@error_messages, 'Disk is in prefail');
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escalate_status('WARNING');
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}
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if ($return_code & 0x20) {
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push(@error_messages, 'Disk may be close to failure');
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escalate_status('WARNING');
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}
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if ($return_code & 0x40) {
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push(@error_messages, 'Error log contains errors');
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escalate_status('WARNING');
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}
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if ($return_code & 0x80) {
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push(@error_messages, 'Self-test log contains errors');
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escalate_status('WARNING');
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}
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if ($return_code && !$exit_status) {
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push(@error_messages, 'Unknown return code');
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escalate_status('CRITICAL');
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}
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if ($return_code) {
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warn "(debug) non-zero exit code, generating error condition\n\n" if $opt_debug;
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}
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else {
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warn "(debug) zero exit code, status OK\n\n" if $opt_debug;
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}
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warn "###########################################################\n" if $opt_debug;
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warn "(debug) CHECK 3: getting detailed statistics\n" if $opt_debug;
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warn "(debug) information contains a few more potential trouble spots\n" if $opt_debug;
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warn "(debug) plus, we can also use the information for perfdata/graphing\n" if $opt_debug;
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warn "###########################################################\n\n\n" if $opt_debug;
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$full_command = "$smart_command -d $interface -A $device";
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warn "(debug) executing:\n$full_command\n\n" if $opt_debug;
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@output = `$full_command`;
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warn "(debug) output:\n@output\n\n" if $opt_debug;
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my @perfdata = qw//;
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# separate metric-gathering and output analysis for ATA vs SCSI SMART output
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if ($interface eq 'ata' || $mode eq 'ata'){
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foreach my $line(@output){
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# get lines that look like this:
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# 9 Power_On_Minutes 0x0032 241 241 000 Old_age Always - 113h+12m
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next unless $line =~ /^\s*\d+\s(\S+)\s+(?:\S+\s+){6}(\S+)\s+(\d+)/;
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my ($attribute_name, $when_failed, $raw_value) = ($1, $2, $3);
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if ($when_failed ne '-'){
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push(@error_messages, "Attribute $attribute_name failed at $when_failed");
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escalate_status('WARNING');
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warn "(debug) parsed SMART attribute $attribute_name with error condition:\n$when_failed\n\n" if $opt_debug;
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}
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# some attributes produce questionable data; no need to graph them
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if (grep {$_ eq $attribute_name} ('Unknown_Attribute', 'Power_On_Minutes') ){
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next;
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}
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push (@perfdata, "$attribute_name=$raw_value");
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# do some manual checks
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if ( ($attribute_name eq 'Current_Pending_Sector') && $raw_value ) {
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push(@error_messages, "Sectors pending re-allocation");
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escalate_status('WARNING');
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warn "(debug) Current_Pending_Sector is non-zero ($raw_value)\n\n" if $opt_debug;
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}
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}
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}
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else{
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my ($current_temperature, $max_temperature, $current_start_stop, $max_start_stop) = qw//;
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foreach my $line(@output){
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if ($line =~ /Current Drive Temperature:\s+(\d+)/){
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$current_temperature = $1;
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}
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elsif ($line =~ /Drive Trip Temperature:\s+(\d+)/){
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$max_temperature = $1;
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}
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elsif ($line =~ /Current start stop count:\s+(\d+)/){
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$current_start_stop = $1;
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}
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elsif ($line =~ /Recommended maximum start stop count:\s+(\d+)/){
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$max_start_stop = $1;
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}
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elsif ($line =~ /Elements in grown defect list:\s+(\d+)/){
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push (@perfdata, "defect_list=$1");
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}
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elsif ($line =~ /Blocks sent to initiator =\s+(\d+)/){
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push (@perfdata, "sent_blocks=$1");
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}
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}
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if($current_temperature){
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if($max_temperature){
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push (@perfdata, "temperature=$current_temperature;;$max_temperature");
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if($current_temperature > $max_temperature){
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warn "(debug) Disk temperature is greater than max ($current_temperature > $max_temperature)\n\n" if $opt_debug;
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push(@error_messages, 'Disk temperature is higher than maximum');
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escalate_status('CRITICAL');
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}
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}
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else{
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push (@perfdata, "temperature=$current_temperature");
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}
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}
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if($current_start_stop){
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if($max_start_stop){
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push (@perfdata, "start_stop=$current_start_stop;$max_start_stop");
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if($current_start_stop > $max_start_stop){
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warn "(debug) Disk start_stop is greater than max ($current_start_stop > $max_start_stop)\n\n" if $opt_debug;
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push(@error_messages, 'Disk start_stop is higher than maximum');
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escalate_status('WARNING');
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}
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}
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else{
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push (@perfdata, "start_stop=$current_start_stop");
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}
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}
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}
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warn "(debug) gathered perfdata:\n@perfdata\n\n" if $opt_debug;
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my $perf_string = join(' ', @perfdata);
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warn "###########################################################\n" if $opt_debug;
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warn "(debug) FINAL STATUS: $exit_status\n" if $opt_debug;
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warn "###########################################################\n\n\n" if $opt_debug;
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warn "(debug) final status/output:\n" if $opt_debug;
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my $status_string = '';
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if($exit_status ne 'OK'){
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$status_string = "$exit_status: ".join(', ', @error_messages);
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}
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else {
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$status_string = "OK: no SMART errors detected";
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}
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print "$status_string|$perf_string\n";
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exit $ERRORS{$exit_status};
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sub print_help {
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print_revision($basename,$revision);
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print "Usage: $basename (--device=<SMART device> --interface=(ata|scsi)|-h|-v) [--debug]\n";
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print " --debug: show debugging information\n";
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print " -d/--device: a device to be SMART monitored, eg /dev/sda /dev/twa0\n";
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print " -i/--interface: ata, scsi, sat,marvell,3ware,N,areca,N,\n";
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print " usbcypress, usbjmicron, usbsunplus, cciss,N, hpt,L/M (or hpt,L/M/N), and test\n";
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print " -m/--mode: Set mode to scsi,ata when drives are behind\n";
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print " hardware raid interface \n";
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print " -h/--help: this help\n";
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print " -v/--version: Version number\n";
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support();
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}
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# escalate an exit status IFF it's more severe than the previous exit status
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sub escalate_status {
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my $requested_status = shift;
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# no test for 'CRITICAL'; automatically escalates upwards
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if ($requested_status eq 'WARNING') {
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return if $exit_status eq 'CRITICAL';
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}
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if ($requested_status eq 'UNKNOWN') {
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return if $exit_status eq 'WARNING';
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return if $exit_status eq 'CRITICAL';
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}
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$exit_status = $requested_status;
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}
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