{{tag>SNMP Supervision}}

= Monitoring procedure Centreon SNMP RedHat

Source http://centreon/centreon/main.php?p=65099&min=1&slug=operatingsystems-linux-snmp

== Prerequisites

This chapter describes the prerequisites installation needed by plugins to run.
Centreon Plugin

Install this plugin on each needed poller:
<code bash>
yum install centreon-plugin-Operatingsystems-Linux-Snmp
</code>

Prerequistes concerns a RHEL like distribution, you may need to adapt it if you run an other Linux distro.

Be sure to have with you the following information:

* Read-Only SNMP community
* IP Address of the monitoring server

Install the SNMP service

With the root user, install the following package and its dependencies:
<code bash>
yum install net-snmp
</code>

Configure SNMP on your server

Open the file /etc/snmp/snmpd.conf with your favorite text editor
Modify the following lines (Replace the <SNMPCOMMUNITY>):
<code - /etc/snmp/snmpd.conf
#com2sec notConfigUser default <SNMPCOMMUNITY>
com2sec notConfigUser default public
</code>

Comment all the lines which begin by view:
<code  - /etc/snmp/snmpd.conf>
view systemview included .1.3.6.1.2
view systemview included .1.3.6.1.2.1.25
</code>

Just after the previous lines, add the following line:
<code  - /etc/snmp/snmpd.conf>
view systemview included .1
</code>
save the file


start the snmp service:
<code bash>
service snmpd start
</code>

Add SNMP to booting services:
<code bash>
chkconfig --add snmpd; chkconfig --level 2345 snmpd on
</code>

Check your SNMP installation
<code bash>
snmpwalk -v 1 -c <SNMPCOMMUNITY> <IPSERVER> .1.3.6.1.2.1.1.1
</code>

You should get a response looking like the following:
<code ->
SNMPv2-MIB::sysDescr.0 = STRING: Linux <SERVER> 2.6.18-128.1.10.el5 #1 SMP Thu May 7 10:39:21 EDT 2009 i686
</code>

SNMP Permissions

You need a SNMP read access on following OIDs:
<code ->
HOST-RESOURCES-MIB: .1.3.6.1.2.1.25 (cpu, uptime, storage, process)
UCD-SNMP-MIB: .1.3.6.1.4.1.2021 (swap, memory, inodes, diskio)
IF-MIB: .1.3.6.1.2.1.2 (traffic)
</code>

Troubleshooting

Read Troubleshooting SNMP