DokuWiki » Infrastructure » Operating System » CentOS 6

h1. Zabbix Agent 1.8

h2. preliminary note

this is mostly taken from http://www.torservers.net/wiki/setup/zabbix

h3. Firewall

In case you use iptables you need to open port 10050 on the client side and 10050 and 10051 on the server side (or any other port of course if you configured Zabbix to use non-standard ports). As an alternative you can also use Active Checks which don't require open Ports on the Nodes that are to be monitored and also help to reduce load on the Server side, since the Client does all the work itself in this case.

h2. Advanced

h3. stunnel

UserParameter=hdd.sda.temperature,/etc/zabbix/scripts/get_smart_value.sh /dev/sda Temperature_Celsius

UserParameter=hdd.sda.raw_read_error_rate,/etc/zabbix/scripts/get_smart_value.sh /dev/sda Raw_Read_Error_Rate

UserParameter=hdd.sda.reallocated_sector_count,/etc/zabbix/scripts/get_smart_value.sh /dev/sda Reallocated_Sector_Ct

UserParameter=hdd.sdb.temperature,/etc/zabbix/scripts/get_smart_value.sh /dev/sdb Temperature_Celsius

UserParameter=hdd.sdb.raw_read_error_rate,/etc/zabbix/scripts/get_smart_value.sh /dev/sdb Raw_Read_Error_Rate

UserParameter=hdd.sdb.reallocated_sector_count,/etc/zabbix/scripts/get_smart_value.sh /dev/sdb Reallocated_Sector_Ct

h3. Custom Scripts "md"

Here is a small script for monitoring md. It can only monitor Raid1 systems so far, since we don't have the need to monitor Raid5 or anything else. Feel free to expand this in case you need it.

<pre><code class="bash">

#!/bin/bash

if [ $# -ne 1 ];

then

echo "Usage: $0 "

exit

fi

var_mdnum="$1"

if [[ "$var_mdnum" != md* ]]

then

var_mdnum=`echo $var_mdnum | sed 's/\/[a-z]*\/md*/md/'`

fi

if [ `cat /proc/mdstat | grep -C 1 $var_mdnum | grep -o UU` == "UU" ]

then

echo 0

exit

else

echo 1

exit

fi

</code></pre>

Put something like

<pre><code class="bash">UserParameter=raid.md0.status, /etc/zabbix/scripts/get_md_status.sh md0</code></pre>

in your zabbix_agentd.conf to use this and configure an Item for it on the Zabbix Server for the node you wish to use this for or in its underlying template.

h3. Custom Scripts "Smart"

<pre><code class="bash">

#!/bin/bash

if [ $# -ne 2 ];

then

echo "Usage: $0 <device> <parameter>"

exit

fi

sudo smartctl -A $1 | grep $2 | tr -s ' ' | sed "s/^[[:space:]]*\(.*\)[[:space:]]*$/\1/" | cut -d " " -f 10

</code></pre>

Make sure smartmontools are installed and accessible for Zabbix.

You might need something like 

<pre><code class="bash">

%zabbix ALL= NOPASSWD: /usr/sbin/smartctl

</code></pre>

in your sudoers file.

Here are my UserParameters:

<pre><code class="bash">

UserParameter=hdd.sda.temperature,/etc/zabbix/scripts/get_smart_value.sh /dev/sda Temperature_Celsius

UserParameter=hdd.sda.raw_read_error_rate,/etc/zabbix/scripts/get_smart_value.sh /dev/sda Raw_Read_Error_Rate

UserParameter=hdd.sda.reallocated_sector_count,/etc/zabbix/scripts/get_smart_value.sh /dev/sda Reallocated_Sector_Ct

UserParameter=hdd.sdb.temperature,/etc/zabbix/scripts/get_smart_value.sh /dev/sdb Temperature_Celsius

UserParameter=hdd.sdb.raw_read_error_rate,/etc/zabbix/scripts/get_smart_value.sh /dev/sdb Raw_Read_Error_Rate

UserParameter=hdd.sdb.reallocated_sector_count,/etc/zabbix/scripts/get_smart_value.sh /dev/sdb Reallocated_Sector_Ct

</code></pre>

h2. FPing

When using Active Checks you might still want to Monitor a hosts uptime. For this you need to install fping on the Server and do a chown root:zabbix on its binary for zabbix to be able to use it.