Munin contributed plugins

#!/usr/local/bin/perl -w

# -*- perl -*-

=head1 NAME

hddtemp_smartctl - Plugin to monitor harddrive temperatures through

SMART

=head1 CONFIGURATION

This plugin needs to run as root or some other user that has access to

the harddrive devices.

The following environment variables are used

 smartctl  - path to smartctl executable

 drives    - List drives to monitor. E.g. "env.drives hda hdc".

 type_$dev - device type for one drive, e.g. "env.type_sda 3ware,0"

             or more typically "env.type_sda ata" if sda is a SATA disk.

 args_$dev - additional arguments to smartctl for one drive,

             e.g. "env.args_hda -v 194,10xCelsius".  Use this to make

             the plugin use the --all or -a option if your disk will

             not return its temperature when only the -A option is

             used.

 dev_$dev  - monitoring device for one drive, e.g. twe0

If the "smartctl" enviroment variable is not set the plugin will

search your $PATH, /usr/bin, /usr/sbin, /usr/local/bin and

/usr/local/sbin for a file called "smartctl", and use that.

If the "drives" environment variable is not set, the plugin will

attempt to search for drives to probe.

=head1 MAGIC MARKERS

 #%# family=auto

 #%# capabilities=autoconf

=head1 AUTHOR

Copyright (c) 2005, Lutz Peter Christoph

All rights reserved.

=head1 LICENSE

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions

are met:

  * Redistributions of source code must retain the above copyright

    notice, this list of conditions and the following disclaimer.

  * Redistributions in binary form must reproduce the above copyright

    notice, this list of conditions and the following disclaimer in

    the documentation and/or other materials provided with the

    distribution.

  * The name and aliases of Lutz Peter Christoph ("Lupe Christoph",

    "Lutz Christoph") may not be used to endorse or promote products

    derived from this software without specific prior written

    permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=head1 NOTES

Note for users of RAID controllers (smartmontools currently only

supports 3ware): you can specify the drives attached to your RAID

controller(s) as raiddev_num (e.g. sda_0). Then you must specify the

type like this: type_sda_0 3ware,0.

Recent versions of the kernel driver use a separate major device

number for monitoring purposes, like /dev/twe<n> or /dev/twa<n>. This

can be put in the e.g. dev_sda environment variable, to allow the user

to keep sda as the name of the disk.

To avoid spinning up sleeping disks smartctl will use the --nocheck

parameter. If this parameter isn't supported by your version of

smartctl then hdparm will be used.  Note that hdparm isn't available

on all platforms.

=cut

use strict;

my $DEBUG = $ENV{'MUNIN_DEBUG'} || 0;

my $smartctl = exists $ENV{smartctl} ? $ENV{smartctl} : '';

# If the envvar is not set, look for smartctl

if (!$smartctl) {

   # Still not found? Check obvious places

    my @dirs = split(':',$ENV{PATH});

    push (@dirs, qw(/usr/bin /usr/sbin /usr/local/bin /usr/local/sbin) );

    until ($smartctl or @dirs == 0) {

        my $dir = shift @dirs;

        my $path = $dir.'/smartctl';

        $smartctl = $path if -x $path;

    }

} elsif (! -x $smartctl) {

    # If it is set, verify it

    warn "Predefined smartctl ($smartctl) is not a executable\n";

    undef $smartctl;

}

# Check version of smartctl to determine --nocheck capabilities

my $use_nocheck = 0;

if ($smartctl and `$smartctl --version` =~ / version (\d+\.\d+) /i) {

    $use_nocheck = $1 >= 5.37;

    warn "[DEBUG] Smartctl supports --nocheck\n" if $DEBUG;

}

# hdparm is used as a fallback

my $hdparm = `which hdparm 2>/dev/null`;

chomp $hdparm;

my @drives;

# Try to get a default set of drives

if ($^O eq 'linux') {

  # On Linux, we know how to enumerate ide drives. SCSI is not as easy

  if (-d '/proc/ide') {

    opendir(IDE, '/proc/ide');

    @drives = grep /hd[a-z]/, readdir IDE;

    closedir(IDE);

  }

  # "SCSI disks" could be both SCSI or SATA - we can't know which

  # without probing them.

} elsif ($^O eq 'freebsd') {

  opendir(DEV, '/dev');

  @drives = grep /^(a?da|ad)[0-9]+$/, readdir DEV;

  closedir(DEV);

} elsif ($^O eq 'solaris') {

  @drives = map { s@.*/@@ ; $_ } glob '/dev/rdsk/c*t*d*s2';

}

@drives = split ' ', $ENV{drives} if exists $ENV{drives};

# Sort list of drives

@drives = sort @drives;

warn "[DEBUG] Drives: ",join(', ',@drives),"\n" if $DEBUG;

if (defined $ARGV[0]) {

  if ($ARGV[0] eq 'autoconf') {

    if ($smartctl and -x $smartctl) {

      if (@drives) {

        my $cmd = command_for_drive_device($drives[0],

                                           device_for_drive($drives[0]));

        if (`$cmd` =~ /Temperature/) {

          print "yes\n";

        } else {

          print "no (first drive not supported, configure the plugin)\n";

        }

        exit 0;

      } else {

        print "no (no drives known)\n";

        exit 0;

      }

    } else {

      print "no (smartctl not found)\n";

      exit 0;

    }

  } elsif ($ARGV[0] eq 'config') {

    print "graph_title HDD temperature\n";

    print "graph_args --base 1000 -l 0\n";

    print "graph_vlabel temp in ╟C\n";

    print "graph_category sensors\n";

    print "graph_info This graph shows the temperature in degrees Celsius of the hard drives in the machine.\n";

    print "$_.label $_\n" foreach @drives;

    exit 0;

  }

}

foreach my $drive (@drives) {

  warn "[DEBUG] Processing $drive\n" if $DEBUG;

  my $fulldev = device_for_drive($drive);

  # Fall back to using hdparm for detecting disks in stand-by only if nocheck

  # isn't supported (hdparm isn't available on all platforms).

  if (!$use_nocheck && $hdparm && $fulldev =~ /\/dev\/[sh]d?/) {

    if (`$hdparm -C $fulldev 2>/dev/null` =~ /standby/) {

        warn "[DEBUG] Drive $fulldev is in standby mode, not checking\n"

            if $DEBUG;

        next;

    }

  }

  my $cmd = command_for_drive_device($drive, $fulldev, $use_nocheck);

  warn "[DEBUG] Command for $drive is % $cmd %\n" if $DEBUG;

  my $output = `$cmd`;

  if ($? ne 0) {

      print "$drive.value U\n";

      print "$drive.extinfo Command $cmd on drive $drive failed: $?.  The plugin needs to have read permission on all monitored devices.\n";

      warn "[ERROR] Command $cmd on drive $drive failed: $?.  The plugin needs to have read permission on all monitored devices.\n";

      next;

  }

  if ($output =~ /Current Drive Temperature:\s*(\d+)/) {

    print "$drive.value $1\n";

  } elsif ($output =~ /^(194 Temperature_Celsius.*)/m) {

    my @F = split /\s+/, $1;

    print "$drive.value $F[9]\n";

  } elsif ($output =~ /^(231 Temperature_Celsius.*)/m) {

    my @F = split ' ', $1;

    print "$drive.value $F[9]\n";

  } elsif ($output =~ /^(190 Airflow_Temperature_Cel.*)/m) {

    my @F = split ' ', $1;

    print "$drive.value $F[9]\n";

  } else {

      print "$drive.value U\n";

      print "$drive.extinfo Temperature not detected in smartctl output\n";

  }

}

sub device_for_drive {

    my ($drive) = @_;

    my $dev = $drive =~ /(.*)(?:_\d+)/ ? $1 : $drive;

    my $fulldev = '/dev/';

    $fulldev .= 'rdsk/' if $^O eq 'solaris';

    $fulldev .= exists $ENV{'dev_'.$drive} ? $ENV{'dev_'.$drive} : $dev;

    return $fulldev;

}

sub command_for_drive_device {

    my ($drive, $fulldev, $use_nocheck) = @_;

    my $cmd = $smartctl.' -A ';

    $cmd .= '--nocheck=standby ' if $use_nocheck;

    $cmd .= $ENV{'args_'.$drive}.' ' if exists $ENV{'args_'.$drive};

    $cmd .= '-d '.$ENV{'type_'.$drive}.' ' if exists $ENV{'type_'.$drive};

    $cmd .= $fulldev;

}