[Xymon] Oracle monitoring with dbcheck fails

[Johan.Grotherus at vattenfall.com]

Hi all,

I am currently under way migrating from my current Xymon server running on Ubuntu to redundant Xymon servers running on CentOS. I am having Oracle monitoring enabled with dbcheck on my Ubuntu server and it is working fine, but the same setup does not work on CentOS.


1.       The oracle client is installed

2.       All required perl modules are installed

3.       The same dbcheck.ini file used on Ubuntu has been copied over to CentOS

4.       The dbcheck task is running

5.       ORACLE_HOME and LD_LIBRARY_PATH has been set

6.       I can connect to all my monitored Oracle instances with: sqlplus64 xymonuser/xymonpassword at host/SID as the Xymon user

7.       The following perl script gives no error output

#!/usr/bin/perl

use DBI;

$ENV{'ORACLE_HOME'}="/usr/lib/oracle/11.2/client64/";

$dbhost="hostname";
$port=1521;
$sid="SID";
$user="xymonuser";
$pw="xymonpassword";
$data_source="DBI:Oracle:host=$dbhost;port=$port;sid=$sid";

$dbh = DBI->connect($data_source,$user,$pw ,{ RaiseError => 1,
PrintError  =>1});  $dbh->disconnect;

exit 0;

However, the only thing I get in the dbfast.log is: Timeout connecting to DBI:Oracle:host=hostname;port=1521;sid=SID!

This is weird, and it got even more weird when I realized that dbcheck does not even try to communicate with the Oracle instances, it simply logs the error message and exits. I ran tcpdump to verify this and there is no connection attempt being made by dbcheck.

The only thing that really differs between the Ubuntu machine and the CentOS machine are the version numbers for certain per modules:

Ubuntu looks like this:

2015-09-15 08:56:42 Using default environment file /usr/lib/xymon/client/etc/xymonserver.cfg
Program Information
        dbcheck.pl version 1.09
        Hobbit_fd_lib.pm version 1.16

OS Information
        Linux hmon01 3.13.0-63-generic #103-Ubuntu SMP Fri Aug 14 21:42:59 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
        Perl version is v5.18.2

Module Information
        FindBin 1.51
        POSIX 1.32
        Text::Wrap 2012.0818
        Time::Local 1.2300
        Sys::SigAction 0.20
        Config::IniFiles 2.82
        DBI 1.63
        DBD::DBM 0.08
        DBD::ExampleP 12.014311
        DBD::File 0.42
        DBD::Gofer 0.015327
        DBD::ODBC 1.45
        DBD::Oracle 1.74
        DBD::Sponge 12.010003
        DBD::mysql 4.025

CentOS looks like this:

2015-09-15 08:55:28.619868 Using default environment file /home/xymon/server/etc/xymonserver.cfg
Program Information
        dbcheck.pl version 1.09
        Hobbit_fd_lib.pm version 1.16

OS Information
        Linux hxm01.ds.driss.se 3.18.17-13.el6.x86_64 #1 SMP Tue Jul 21 17:17:17 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
        Perl version is v5.10.1

Module Information
        FindBin 1.50
        POSIX 1.17
        Text::Wrap 2009.0305
        Time::Local 1.1901
        Sys::SigAction 0.11
        Config::IniFiles 2.56
        DBI 1.609
        DBD::DBM 0.03
        DBD::ExampleP 12.010007
        DBD::File 0.37
        DBD::Gofer 0.011565
        DBD::Oracle 1.74
        DBD::Sponge 12.010002
        DBD::mysql 4.013

So, I must be missing something, but I have not found what that is, any ideas?

/Johan


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