371 lines
8.6 KiB
Plaintext
371 lines
8.6 KiB
Plaintext
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#!/usr/bin/perl
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# check_sybase
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# A nagios plugin that connects to a Sybase database and checks free space.
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#
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# Copyright 2004-2005 Simon Bellwood, NetMan Network Management and IT
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# Services GmbH
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# Portions Copyright 2001 Michael Peppler.
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# License: GPL
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#
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# Bugs and feedback to simon.bellwood@NOSPAM.net-man.at
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# Latest version available from:
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# http://www.net-man.at/software/check_sybase-LATEST.zip
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#
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# Revision history:
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# 0.1 01-OCT-2004 Initial version.
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# 0.2 08-NOV-2004 Initial release.
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# 0.3 13-JAN-2005 Fixed lib path, improved timeouts.
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# 0.4 26-JAN-2005 Added loginTimeout.
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# 0.5 04-FEB-2005 Fixed dates in history. Oops.
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# 0.6 29-MAR-2005 Added --explain option.
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# 0.7 08-APR-2005 Added initial performance data support.
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my $VERSION = "0.7";
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#use warnings;
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use strict;
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use DBI;
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use Getopt::Long;
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use lib qw( /usr/lib/nagios/plugins/ /usr/local/nagios/libexec/ );
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use utils qw(%ERRORS &print_revision &support &usage $TIMEOUT);
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my $PROGNAME = "check_sybase";
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my $DEFAULT_CHECKTYPE = "FREESPACE";
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my $DEFAULT_WARNING = "25";
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my $DEFAULT_CRITICAL = "10";
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my $DEFAULT_TIMEOUT = "30";
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my ($user, $pass, $dbsvr, $dbname, $config, $checktype, $explain,
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$warn, $crit, $timeout, $help, $version);
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my $options_okay = GetOptions(
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"U|user=s" => \$user,
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"P|pass:s" => \$pass, # ":" means optional
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"S|dbsvr=s" => \$dbsvr,
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"D|dbname=s" => \$dbname,
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"config=s" => \$config,
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"checktype=s" => \$checktype,
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"explain" => \$explain,
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"w|warning=i" => \$warn,
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"c|critical=i" => \$crit,
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"t|timeout=i" => \$timeout,
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"h|help" => \$help,
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"V|version" => \$version
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);
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if (! $options_okay) # Bad option passed
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{
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&help;
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&nunk("Bad command line option passed!");
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}
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# Use defaults, if needed
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$warn = $warn || $DEFAULT_WARNING;
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$crit = $crit || $DEFAULT_CRITICAL;
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$checktype = $checktype || $DEFAULT_CHECKTYPE;
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$timeout = $timeout || $TIMEOUT || $DEFAULT_TIMEOUT;
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if ($help)
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{
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&help;
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&nok;
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}
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if ($version)
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{
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print_revision($PROGNAME,"\$Revision: 1.3 $VERSION \$");
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&nok;
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}
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if ($config) # Read any of "user", "pass", "dbsvr", "dbname" from config file
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{
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&read_config;
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}
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# Some more descriptive syntax checks
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my $syntax_error;
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$syntax_error .= "No dbsvr given! " unless $dbsvr;
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$syntax_error .= "No dbname given! " unless $dbname;
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$syntax_error .= "No user given! " unless $user;
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$syntax_error .= "Bad checktype given!"
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unless $checktype =~ m/^CONNECT|FREESPACE$/;
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&nunk($syntax_error) if $syntax_error;
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# Just in case of problems, let's not hang Nagios
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$SIG{'ALRM'} = sub {
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&nunk("Timeout: no response from dbsvr $dbsvr within $timeout seconds");
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};
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alarm($timeout);
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# Decide on what we are checking
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if ($checktype eq "CONNECT")
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{
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&connect;
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}
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elsif ($checktype eq "FREESPACE")
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{
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&check_space;
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}
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my $dbh;
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my $is_connected;
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sub connect
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{
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$dbh = DBI->connect("dbi:Sybase:server=$dbsvr;database=$dbname;".
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"timeout=$timeout,loginTimeout=$timeout", $user, $pass)
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or &ncrit("Could not connect to '$dbname' on '$dbsvr'");
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# Report success for a check of type CONNECT
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&nok("Connect okay") if $checktype ne "FREESPACE";
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}
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sub disconnect
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{
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$dbh->disconnect if $is_connected;
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$is_connected = 0;
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}
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sub check_space
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{
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&connect;
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# Most of this sub based on Michael Peppler's check-space.pl
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# For debugging purposes, more values are collected than needed.
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$dbh->{syb_do_proc_status} = 1;
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my $dbinfo;
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# First check space in the database
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my $sth = $dbh->prepare("sp_spaceused")
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or &nunk("Failed to call sp_spaceused on '$dbsvr'");
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$sth->execute
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or &nunk("Failed to call sp_spaceused on '$dbsvr'");
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do {
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while(my $d = $sth->fetch)
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{
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if($d->[0] =~ /$dbname/)
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{
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# Grab "database_size"
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$d->[1] =~ s/[^\d.]//g;
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$dbinfo->{size} = $d->[1];
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}
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else
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{
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# Reserved, data, index, unused
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foreach (@$d)
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{
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s/\D//g;
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}
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# Grab "reserved", "data", "index"
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$dbinfo->{reserved} = $d->[0] / 1024;
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$dbinfo->{data} = $d->[1] / 1024;
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$dbinfo->{index} = $d->[2] / 1024;
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$dbinfo->{unused} = $d->[3] / 1024;
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}
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}
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} while($sth->{syb_more_results});
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&explain("db size: ".$dbinfo->{size});
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&explain("reserved: ".$dbinfo->{reserved});
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&explain(" data: ".$dbinfo->{data});
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&explain(" index: ".$dbinfo->{index});
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&explain(" unused: ".$dbinfo->{unused});
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# Get the actual device usage from sp_helpdb to get the free log space
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$sth = $dbh->prepare("sp_helpdb $dbname")
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or &nunk("Failed to call sp_helpdb $dbname on '$dbsvr'");
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$sth->execute
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or &nunk("Failed to call sp_helpdb $dbname on '$dbsvr'");
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do {
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while(my $d = $sth->fetch)
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{
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# Look for "usage" column with value "log only"
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if($d->[2] && $d->[2] =~ /log only/)
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{
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# Grab "size", add it to our log size
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$d->[1] =~ s/[^\d\.]//g;
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$dbinfo->{log} += $d->[1];
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}
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# Look for "device fragments" column with "log only"
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# followed by a number.
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if($d->[0] =~ /log only .* (\d+)/)
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{
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$dbinfo->{logfree} = $1 / 1024;
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}
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}
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} while($sth->{syb_more_results});
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&explain("log: ".$dbinfo->{log});
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&explain("logfree: ".$dbinfo->{logfree});
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# Subtract the log size from the database size
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$dbinfo->{realsize} = $dbinfo->{size} - $dbinfo->{log};
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&explain("realsize (i.e. size - log) = ".$dbinfo->{realsize});
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# The "reserved" space is free for use by the table that freed it, so
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# it is not truly free space. To be safe, our calculation ignores it.
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my $free = ($dbinfo->{realsize} - $dbinfo->{reserved})/$dbinfo->{realsize};
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$free = sprintf("%.2f", $free*100);
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&explain("(realsize-reserved)/realsize = $free%");
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&explain("For safety, this calculation assumes no log space reuse. ".
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"Because of this, you may get negative values.");
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if ($free < $crit)
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{
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&ncrit("Free space is $free%! (critical threshold is $crit%)".
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"|free_space=$free%");
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}
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if ($free < $warn)
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{
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&nwarn("Free space is $free%! (warning threshold is $warn%)".
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"|free_space=$free%");
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}
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&nok("Free space within thresholds ($free% free)".
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"|free_space=$free%");
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}
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sub read_config
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{
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open (CONFIG, "<$config")
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or &nunk("Failed to open config file '$config': $!");
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while (<CONFIG>)
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{
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chomp;
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next if m/^#/; # skip comments
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next if m/^$/; # skip blanks
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# Each case-insensitive argument can be followed by an optional
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# colon, then must be followed by whitespace and the value.
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# Options in the config file override those given on the
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# command line, but don't rely on this!
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if (m/USER:?\s+(\S+)/i)
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{
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$user = $1;
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}
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elsif (m/PASS:?\s+(\S+)/i)
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{
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$pass = $1;
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}
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elsif (m/DBSVR:?\s+(\S+)/i)
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{
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$dbsvr = $1;
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}
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elsif (m/DBNAME:?\s+(\S+)/i)
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{
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$dbname = $1;
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}
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else
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{
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&nunk("Invalid line $. in config file '$config'");
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}
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}
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close (CONFIG);
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}
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sub help
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{
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print <<_HELP_;
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Usage: $PROGNAME OPTIONS
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A nagios plugin that connects to a Sybase database and checks free space.
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Mandatory arguments to long options are mandatory for short options too.
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-U, --user Username to connect to database.
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-P, --pass Password to connect to database.
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-S, --dbsvr Database server (as in the interfaces file).
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-D, --dbname Database name to check.
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--config=FILE Config file (see SECURITY below)
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--checktype=TYPE Type of check to run (see TYPEs below)
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--explain Explains how we calculated the free space.
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-w, --warning Warning threshold, in percent (default 25)
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-c, --critical Critical threshold, in percent (default 10)
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-t, --timeout Timeout value, in seconds (default 30)
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-h, --help This help message
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-V, --version Version information ($VERSION)
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Examples:
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$PROGNAME -U sa -P secret -S bigbox -D orders
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$PROGNAME --config=/secure/nagios-sybase.cfg --checktype=CONNECT
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TYPEs
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There are two types of checks you can run:
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--checktype=CONNECT
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Checks just the connection to the database.
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--checktype=FREESPACE
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(Default) Checks both the connection to the database and the free space.
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SECURITY - Using a config file
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Since a "ps ax" will reveal your database username and password, you can
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instead specify them in a config file. Pass the config file with --config.
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The format of the file is:
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USER value
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PASS value
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You can also specify a DBSVR and DBNAME in the file. Comments (#) and blank
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lines are ignored. Use whitespace to separate argument and value.
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_HELP_
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}
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sub explain
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{
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return unless $explain;
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my $msg = shift;
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print "$msg\n";
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}
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# Some wrappers..
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# Returns code 0, OK
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sub nok
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{
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my $msg = shift;
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print "OK: $msg\n" if $msg;
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&disconnect;
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exit $ERRORS{OK};
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}
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# Returns code 1, Warning
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sub nwarn
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{
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my $msg = shift;
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print "WARNING: $msg\n";
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&disconnect;
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exit $ERRORS{WARNING};
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}
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# Returns code 2, Critical
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sub ncrit
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{
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my $msg = shift;
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print "CRITICAL: $msg\n";
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&disconnect;
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exit $ERRORS{CRITICAL};
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}
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# Returns code 3, Unknown
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sub nunk
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{
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my $msg = shift;
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print "ERROR: $msg\n";
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&disconnect;
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exit $ERRORS{UNKNOWN};
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}
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