Shell Programming and Scripting

I am novice to perl. Can someone guide me on the below query. We have an existing perl script which connects to database to check the disk group status which i wanted to retieve directly from ASM rather than database.
This is because, a cluster has more than 4 databases running and a check on each database would report same diskgroup infiormation.

Hence had modified the exitsting script as shown below ...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#!/usr/bin/perl
#####################################################################
# #
# ASM Diskgroup space usage #
# #
#####################################################################
use lib '.';
#use lib "/opt/nagios/libexec";
use nagios_dbcheck_lib;
#use strict;
use warnings;
use Getopt::Long;
use DBI;
use DBD::Oracle qw(ra_session_modes);

#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
# Global Variables #
#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
# Nagios Thresholds
my %G_SETTINGS = (
asmdgspace => { warning => 15, critical => 10 }, # Free extends.
);
my %G_PARAMS; # Script parameters
my $nagios_message = " "; # Body of nagios email
my $debug = 0; # troubleshooting only, must be 0 in production!
my $warning_thresh = 0;
my $critical_thresh = 0;

#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
# Parameter Checks #
#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
GetOptions(
"sid=s" => \$G_PARAMS{sid}, # can be a service, too. Must be defined in tnsnames.ora
);
# sanity check
foreach my $key (keys %G_PARAMS) {
if ( !defined ($G_PARAMS{$key}) ) {
print "UNKNOWN - mandatory parameters not passed to script\n";
help();
exit 3
}
}

#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
# Nagios Check Code #
#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#

print "ASM Diskgroup space usage check\n" if $debug;
my $query = "
SELECT (CASE
WHEN (total_mb/1024) >= 2000 AND (free_mb/1024) < 150 THEN 'CRITICAL'
WHEN (total_mb/1024) < 2000 AND (free_mb/total_mb*100) < $G_SETTINGS{asmdgspace}{critical} THEN 'CRITICAL'
WHEN (free_mb/total_mb*100) between $G_SETTINGS{asmdgspace}{critical} and $G_SETTINGS{asmdgspace}{warning} THEN 'WARNING'
ELSE 'N/A'
END) Alert,
NAME,
TOTAL_MB,
FREE_MB,
ROUND(free_mb/total_mb*100, 2) pct_free,
STATE,
OFFLINE_DISKS from v\$ASM_DISKGROUP_STAT
where (free_mb/total_mb*100) <= $G_SETTINGS{asmdgspace}{warning}";


my $sth = runAsmCheck($G_PARAMS{sid}, $query);
while ( my $r = $sth->fetchrow_hashref('NAME_lc')) {
$nagios_message .= "ASM Diskgroup filling: $r->{name} Total(MB): $r->{total_mb} Free(MB): $r->{free_mb} PCT_Free: ($r->{pct_free} %) \n";
$critical_thresh = 1 if ($r->{alert} eq "CRITICAL" );
$warning_thresh = 1 if ($r->{alert} eq "WARNING" );
}
$sth->finish;
dbh_dc();

cleanup_and_exit("CRITICAL"," Priority 2: ASM Diskgroup Filling | " . $nagios_message) if $critical_thresh;
cleanup_and_exit("WARNING"," Priority 3: ASM Diskgroup Filling | " . $nagios_message) if $warning_thresh;
cleanup_and_exit("OK","No problem detected |");
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Note: runAsmCheck is a subroutine within the script nagios_dbcheck_lib.pm and that reads as ...


sub runAsmCheck {
my ($sid, $query) = @_;
# connect to the database
eval {
$dbh = DBI->connect(
"dbi:Oracle:sid=$sid",
"nagiosmon", "password", { ora_session_mode => 2 }, { RaiseError => 1, AutoCommit => 0 });
};
if ($@) {
print "ERROR";
my $dbi_errorstr;
if (DBI::errstr) {
$dbi_errorstr = DBI::errstr;
}else{
$dbi_errorstr = "";
}
cleanup_and_exit("CRITICAL", "Failed to connect to database $sid | " . $dbi_errorstr);
}
my $sth = $dbh->prepare($query);
$sth->execute();
return $sth;
}

It simply reports failed to connect ...

$ perl check_asm_diskgroup_space_usage.pl -s whqa
ERRORCRITICAL - Failed to connect to database whqa


Thanks

Did you ever get this figured out? I have been tasked with monitoring ASM through nagios. It looks like your script is what I'm looking for.