AlexNogard: IT HowTo

Linux & Opensource : Monitoring : Centreon, Nagios, Owncloud ..

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Centreon : Update 2.3.8 to 2.4.5 on Centos 6.X

Logo CentreonThe 2.4.X Centreon version are now stables for some times. Here is a small Howto explaining how to update your Centreon 2.3.x to the latest stable release date: Centreon 2.4.5.

I am currently using Centreon 2.3.8 on Centos 6.4. The broker is ndo2db with Nagios core. This tutorial is the next logical howto : Installing Centreon 2.3.8 on Centos 6.2. Approach is almost the same with Broker :  Centreon-Broker.

Here’s how to update Centreon 2.3.8 to Centreon 2.4.5 with Nagios & ndo2db.

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Monitoring Oracle Database with Check_oracle_health & Nagios / Centreon

oracle logoCheck_oracle_health is a great Oracle Database monitoring Tools. This plugin help you retrieve a variety of data such as the time to connect to a database, the number of connected users, the invalid objects sum, free space in a tablespace and many other counters …

We will use it with Centreon to exploit check_oracle_health data monitoring  as graphs. A dedicated Nagios part is also in this article.

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Howto Install nagios 4.0.1 on Centos 6.4

logo nagios

Nagios is a monitoring tool under GPL licence. This tool lets you monitor servers, network hardware (switches, routers, …), applications and services. A lot of plugins are available (more than 3000) and its big community makes Nagios the biggest and the most maintained open source monitoring tool. This tutorial shows how to install Nagios 4.0.1 on CentOS 6.4.

Nagios 4 is the latest stable release published the 20th of last september. This release improved disk I/O latency, some new configuration variables, and other specifications available here : What’s new in Nagios core 4.X.X.

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Argument “v6.0.1” isn’t numeric in numeric lt (<)

logo nagios

In nagios, you will encounter this error”Argument “v6.0.1″ isn’t numeric in numeric lt (<)” with plugins like “check_snmp_ *” To solve this problem, just replace:

 

(Net::SNMP->VERSION < 4 )

by

(Net::SNMP->VERSION lt 4 )

On the line number corresdonding to this error in plugins.

This problem is due to the fact that plugins are quite old and libnet-snmp-perl has evolved.

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Error: Could not open command file ‘/usr/local/nagios/var/rw/nagios.cmd’ for update!

Error: Could not open command file '/usr/local/nagios/var/rw/nagios.cmd' for update!

Error: Could not open command file ‘/usr/local/nagios/var/rw/nagios.cmd’ for update!,An error that comes up from time to time and is quite annoying to deal with, I found a way to fix the problem, it is not the best way, but it is simple and fast.

Explanation: when nagios starts, it creates a file that will run nagios.cmd our services, excluding, for some, bad rights are granted, the right permissions being 666.

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