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2010-04-02T11:04:34Z

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{{DISPLAYTITLE:check_pgsql - NRPE S.M.A.R.T harddisk check}}
[[category:nagios]]
S.M.A.R.T is a technology used to ask harddisks how they are doing. You can have Nagios monitor the temperature of the harddisks in your servers using this port:
<pre>
$ cat /usr/ports/net-mgmt/nagios-check_smartmon/pkg-descr
check_smartmon is a Nagios plug-in written in python that uses
smartmontools to check disk health status and temperature.
</pre>

== Configuring Nagios ==
First I define a few new services on the Nagios server, in <code>/usr/local/etc/nagios/objects/services.cfg</code>. I define one service per disk name I want to check. If I have three servers with an <code>ad0</code> drive, and one server (host2 in the example below) with both <code>ad0</code> and <code>ad1</code> drives, I add service definitions for checking both <code>ad0</code> and <code>ad1</code>:
<pre>
# SMART ad0
define service {
use generic-service
host_name host1,host2,host3
service_description nrpe_check_smart_ad0
check_command check_nrpe2!check_smart_ad0
}

# SMART ad1
define service {
use generic-service
host_name host2
service_description nrpe_check_smart_ad1
check_command check_nrpe2!check_smart_ad1
}
</pre>

Instead of adding the server hostnames to the service definitions directly, I could also have added the servers I want to check to groups called something like <code>smart-ad0-servers</code>, <code>smart-ad1-servers</code> etc., and then added the groups to the services, but for now I did it like this.

== Install the plugin ==
Install the port:
<pre>
sudo portmaster /usr/ports/net-mgmt/nagios-check_smartmon/
</pre>

== Fix sudo permissions ==
The Nagios user needs permission to run the <code>smartctl</code> binary with root permissions, I recommend using sudo for this purpose. I add the following to <code>/usr/local/etc/sudoers</code> on the servers being monitored:
<pre>
nagios ALL=(ALL) NOPASSWD: /usr/local/libexec/nagios/check_smartmon -d /dev/ad*
nagios ALL=(ALL) NOPASSWD: /usr/local/libexec/nagios/check_smartmon -d /dev/da*
</pre>

The first line is needed if you are checking ide <code>adX</code> devices, the second line is needed if you are checking scsi or usb <code>daX</code> devices. I normally just leave both of them in.

To test this, as a user who has sudo access run the following command, substituting <code>ad10</code> for the device name you want to monitor:
<pre>
$ sudo su -m nagios -c "sudo /usr/local/libexec/nagios/check_smartmon -d /dev/ad10"
OK: device is functional and stable (temperature: 36)
</pre>

If you get a reply like the one above, everything works as intended.

== Configuring NRPE ==
On the server being monitored, add the following line to <code>/usr/local/etc/nrpe.cfg</code> (this example has both an <code>ad0</code> and an <code>ad1</code> drive:
<pre>
command[check_smart_ad0]=/usr/local/bin/sudo /usr/local/libexec/nagios/check_smartmon -d /dev/ad0
command[check_smart_ad1]=/usr/local/bin/sudo /usr/local/libexec/nagios/check_smartmon -d /dev/ad1
</pre>

Remember to restart NRPE after changing the config:
<pre>
sudo /usr/local/etc/rc.d/nrpe2 restart
</pre>

Check smartmon - NRPE S.M.A.R.T harddisk check - Revision history

Tykling: Created page with '{{DISPLAYTITLE:check_pgsql - NRPE S.M.A.R.T harddisk check}} category:nagios S.M.A.R.T is a technology used to ask harddisks how they are doing. You can have Nagios monitor t…'