Perl subroutine not running when script executed from Nagios XI back-end - perl

Question

I have a Perl script that is executed from Nagios XI.
It has two subroutines: SendEmail and SendTraps.
The script works fine when executed manually by passing the required parameters, but it doesn't work when triggered from Nagios. The script gets executed but the subroutines are skipped.
echo is working, but the two subroutines are not working even if the condition is met.
if ( ( $hoststatetype =~ m/HARD/ ) && ( $hoststate =~ m/DOWN/ ) ) {
`echo "HOST::$prihost $hostoutput">>/tmp/failover_log.txt`;
sendMail();
send_trap();
}
Full script here:
use strict;
use warnings;
use Text::CSV;
# Declared all the variables here
# Parsing input arguments
if ( $#ARGV > -1 ) {
if ( $ARGV[0] eq "-nagiosxi_trigger" ) {
$prihost = $ARGV[1];
$hoststate = $ARGV[2];
$hoststatetype = $ARGV[3];
$hostoutput = $ARGV[4];
}
elsif ( $ARGV[0] eq "-manual_trigger" ) {
$comment = $ARGV[1];
$userid = $ARGV[2];
$flag = "Failover-Trigger_Manual";
print "Maunal Failover triggered with comment: $comment by $userid\n";
$error_desc = "Maunal Failover triggered with comment: $comment by $userid";
send_trap();
sendMail();
exit 0;
}
else {
print STDERR "Invalid parameter $ARGV[0] \n";
exit 1;
}
}
else {
print STDERR "ERROR:No Arguments Passed.\n";
exit 1
}
# Check if Host or Service is in Hard/down state
if ( ( $hoststatetype =~ m/HARD/ ) && ( $hoststate =~ m/DOWN/ ) ) {
`echo "HOST::$prihost $hostoutput">>/tmp/failover_log.txt`;
sendMail();
send_trap();
}
elsif ( ( $hoststatetype =~ m/SOFT/ ) && ( $hoststate =~ m/DOWN/ ) ) {
`echo "HOST::$prihost $hostoutput">>/tmp/failover_log.txt`;
}
else {
`echo "HOST Good, $prihost $hostoutput">>/tmp/failover_log.txt`;
}
# Sub-Routines
sub failover {
my $csv = Text::CSV->new({ sep_char => ',' }) or die "Cannot use CSV: ".Text::CSV->error_diag ();;
my $file = "myxilist";
my $primary;
my $secondary;
#my $xienv;
my $host = `hostname`;
chomp $host;
open( my $data, '<', $file ) or die "Could not open '$file' $!\n";
while ( my $xi = <$data> ) {
chomp $xi;
if ( $csv->parse($xi) ) {
my #fields = $csv->fields();
if ( $fields[0] =~ m/$host/ ) {
$primary = $fields[1];
$secondary = $fields[0];
$xienv = $fields[2];
}
elsif ( $fields[1] =~ m/$host/ ) {
$primary = $fields[0];
$secondary = $fields[1];
$xienv = $fields[2];
}
}
else {
warn "Line could not be parsed: $xi\n";
exit 1;
}
}
my $failovermsg="failover successful from $primary to $secondary server";
return $failovermsg;
}
sub sendMail {
# Build the list for mailing out results
my $mailSubject;
my $mailID = "test\#mail.com";
my #results = failover();
$mailSubject = "Failover Successful on $xienv instance";
print "Sending email to $mailID \n";
`echo "sending Email">>/tmp/failover_log.txt`;
open MAILX, "|/usr/bin/mailx -s \"$mailSubject\" $mailID " or die $!;
print MAILX "#results";
close MAILX;
return;
}
sub send_trap {
# Sending SNMP traps
my #results = failover();
my $trap = `/usr/bin/snmptrap -v 2c -c public tcp:server:1010 '' MIB::Event Hostname s "$xienv" nSvcDesc s "$flag" nSvcStateID i 2 nSvcOutput s "#results"`;
return;
}
Any thoughts what could be missing?

Answer 1

Issue was in the failover() SubRoutine. I was calling a file "myxilist" that was present in the same directory as the script.
So, the script was working fine when called manually, but when it is triggered from application, script is getting executed from some other directory and the failover sub exits, as it's not able to open the file.
I've provided the full path of the file and the script works fine.
Thank you all for your help.