Support:Nagios - Revision history

imported>Kymara: Created page with "Nagios3 monitoring server running on . ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

2011-06-07T08:07:08Z

Created page with "Nagios3 monitoring server running on <servername>. ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

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imported>Kymara: Created page with "Nagios3 monitoring server running on . ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

2011-06-07T08:07:08Z

Created page with "Nagios3 monitoring server running on <servername>. ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

← Older revision	Revision as of 08:07, 7 June 2011
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imported>Kymara: Created page with "Nagios3 monitoring server running on . ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

2011-06-07T08:07:08Z

Created page with "Nagios3 monitoring server running on <servername>. ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

← Older revision	Revision as of 08:07, 7 June 2011
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imported>Kymara: Created page with "Nagios3 monitoring server running on . ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

2011-06-07T08:07:08Z

Created page with "Nagios3 monitoring server running on <servername>. ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

← Older revision	Revision as of 08:07, 7 June 2011
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imported>Kymara: Created page with "Nagios3 monitoring server running on . ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

2011-06-07T08:07:08Z

Created page with "Nagios3 monitoring server running on <servername>. ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

← Older revision	Revision as of 08:07, 7 June 2011
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imported>Kymara: Created page with "Nagios3 monitoring server running on . ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

2011-06-07T08:07:08Z

Created page with "Nagios3 monitoring server running on <servername>. ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

← Older revision	Revision as of 08:07, 7 June 2011
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imported>Kymara: Created page with "Nagios3 monitoring server running on . ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

2011-06-07T08:07:08Z

Created page with "Nagios3 monitoring server running on <servername>. ==Nagios Interface== Runs on an apache2 server. * http://.../nagios3 *Plugins in use: check_nrpe ([http://nagios.sourceforg..."

New page

Nagios3 monitoring server running on <servername>.

==Nagios Interface==

Runs on an apache2 server.

* http://.../nagios3

*Plugins in use: check_nrpe ([http://nagios.sourceforge.net/docs/nrpe/NRPE.pdf Linux], [http://nsclient.org/nscp/wiki/doc/installation Windows]), [http://exchange.nagios.org/directory/Plugins/Databases/Others/check_sql/details check_sql], [http://code.google.com/p/check-mysql-all/wiki/check_mysql_all check_mysql_all], [http://labs.consol.de/lang/en/nagios/check_mysql_health/ check_mysql_health], [http://www.sysadminsjourney.com/content/2009/06/04/new-and-improved-checkmempl-nagios-plugin check_mem]

==Documentation==

*http://www.nagios.org/documentation

==Installation==

<pre>apt-get install nagios3</pre>
Installs nagios3 and required packages (Apache2, postfix, mailx)

Nagios installation at /etc/nagios3/
<br>Nagios plugins at /usr/lib/nagios/plugins/ (/etc/nagios-plugins/config/ for configuration files)

Nagios configuration file is at /etc/nagios3/nagios.cfg

==Adding a host==

Created /etc/nagios3/objects/ directory to hold configuration files for the different servers.

If the new host type isn't included in an existing template (windows, linux), edit the templates.cfg and add the new template.
The templates are configured exactly the same at the moment, but it is worth adding a new template in case we need to configure the different host types.
*example template file
<pre>define host{
name windows-server ; name of this template
use generic-host; inherit default values
check_period 24x7
check_interval 5
retry_interval 1
max_check_attempts 10
check_command check-host-alive
notification_period 24x7
notification_interval 30
notification_options d,r
contact_groups admins
register 0 ; DON'T REGISTER THIS, IT'S A TEMPLATE
}

define host{
name linux-server
use generic-host
check_period 24x7
check_interval 5
retry_interval 1
max_check_attempts 10
check_command check-host-alive
notification_period 24x7
notification_interval 30
notification_options d,r
contact_groups admins
register 0;
} </pre>

The hosts are defined in either the linux or windows .cfg files corresponding to their host type. To add a new host, edit one of these .cfg files or create a new file for a new host type. Remember to edit the nagios.cfg to use any new .cfg files (add line cfg_file=/etc/nagios3/objects/<filename>).

*example host definition

<pre>
define host{
use linux-server #inherit the settings from the template defined in templates.cfg
host_name XXX #name that the host will be referred to as
alias XXX #alias name for descriptive purposes
address xxx.xx.xx.xx #address of host
}
</pre>

Recommended that you then add this host to a hostgroup. These are defined at /etc/nagios3/objects/hostgroups.cfg. Hostgroups allow services to be issued to multiple hosts with only one definition.

*example hostgroup definition
<pre>
define hostgroup{
hostgroup_name debian-servers
alias Debian GNU/Linux Servers
members localhost,..........
}
</pre>

A host can be added to more than one hostgroup.

==Adding a service==

Services perform the checks on the hosts. Some services are defined in the windows and linux .cfg files (checks on the general well being of the host e.g. disk space checks, processes running) where as some are defined in their own files (e.g. the sql service definitions are in sql.cfg).

*example service definition
<pre>
define service{
use generic-service #inherit settings from the generic-service template
host_name XXX #host to run the service on, to run the service on a hostgroup use hostgroup_name <hostgroup name>
service_description Current Load #name that will show up on the nagios interface
check_command check_nrpe_1arg!connect #command to be run by the service, defined in commands.cfg. <command name>!<argument1>!<argument2>!... This example uses the command to run the check_nrpe plugin with one argument,
the connect check.
</pre>

==Adding commands==

The commands to be run by the services can be found at /etc/nagios3/objects/commands.cfg. Some commands for plugins (e.g. the check_nrpe plugin used above) are defined at /etc/nagios-plugins/config/.

*example command
<pre>
define command{
command_name check_mysql_all #name that the command will be referred to as
command_line /usr/lib/nagios/plugins/check_mysql_all -K $ARG1$ -H $HOSTNAME$ --port 3306 -u <username> -p <password> #the command to be run when the command name is used. The $ARG1$ in this example will be replaced by
the first argument provided in the service calling the command. $ARG2$ would be the second and so forth.
}
</pre>

To use a new plugin for Nagios, the command_line path must lead to the plugin. Refer to the plug-in's documentation for what checks can be run and edit the command line to match.