SNMP+CACTI

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What is SNMP

Simple Network Management Protocol (SNMP) is an "Internet-standard protocol for managing devices on IP networks.Devices that typically support SNMP include routers, switches, servers, workstations, printers, modem racks, and more. It is used mostly in network management systems to monitor network-attached devices.

Required software(s)

• MySQL Server : Store cacti data.

• NET-SNMP server - SNMP (Simple Network Management Protocol) is a protocol used for network management.

• PHP with net-snmp module - Access SNMP data using PHP.

• Apache / lighttpd / ngnix webserver : Web server to display graphs created with PHP and RRDTOOL
  

Install the software

[root@localhost ~]# yum install mysql* php* http* -y

Configure MySQL server

[root@localhost ~]# /etc/init.d/mysqld restart

[root@localhost ~]# mysqladmin password "redhat"

Create cacti MySQL database and Password

[root@localhost ~]# mysql -u root -predhat

mysql> create database cacti;
mysql> GRANT ALL ON cacti.* TO cacti@localhost IDENTIFIED BY 'cacti';
mysql> FLUSH privileges;
mysql> \q

Install snmpd

[root@localhost ~]# yum install snmp*

Configure snmpd, open /etc/snmp/snmpd.conf

[root@localhost ~]# vim /etc/snmp/snmpd.conf

modify it as follows Lines and edit

 
 view    systemview    included   .1
 com2sec local     localhost           public
 group MyRWGroup v1         local
 group MyRWGroup v2c        local
 group MyRWGroup usm        local
 view all    included  .1                               80
 access MyRWGroup ""      any       noauth    exact  all    all    none
 syslocation Unknown (edit /etc/snmp/snmpd.conf)
 syscontact Root  (configure /etc/snmp/snmp.local.conf)
 pass .1.3.6.1.4.1.4413.4.1 /usr/bin/ucd5820stat

Save and close the file. Turn on snmpd service:

[root@localhost ~]# /etc/init.d/snmpd restart

[root@localhost ~]# /etc/init.d/snmptrapd restart

[root@localhost ~]# chkconfig snmpd on

[root@localhost ~]# chkconfig snmptrapd on

Make sure you are getting information from snmpd:

[root@localhost ~]# snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

Sample ouptut:

IP-MIB::ipAdEntIfIndex.127.0.0.1 = INTEGER: 1

IP-MIB::ipAdEntIfIndex.192.168.0.219 = INTEGER: 2

Install cacti

[root@localhost ~]# rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm

[root@localhost ~]# yum install cacit*

Type the following command to find out cacti.sql path:

[root@localhost ~]# rpm -ql cacti | grep cacti.sql

Sample Output:

/usr/share/doc/cacti-0.8.7g/cacti.sql

Type the following command to install cacti tables (you need to type the cacti user password):

[root@localhost ~]# mysql -u cacti -p cacti < /usr/share/doc/cacti-0.8.7g/cacti.sql

Configure cacti

[root@localhost ~]# vim /etc/cacti/db.php

Make changes as follows:

$database_type = "mysql";
$database_default = "cacti";
$database_hostname = "localhost";
$database_username = "cacti";
$database_password = "cacit";
$database_port = "3306";

Configure httpd Open /etc/httpd/conf.d/cacti.conf file

[root@localhost ~]# vim /etc/httpd/conf.d/cacti.conf

Alias /cacti    /usr/share/cacti

<Directory /usr/share/cacti/>
        Order Deny,Allow
        Deny from all
        Allow from 192.168.0.0/24
</Directory>

Save and close the file. Turn on httpd service:

[root@localhost ~]# /etc/init.d/httpd restart

[root@localhost ~]# chkconfig httpd on

Setup cacti cronjob Open /etc/cron.d/cacti file

[root@localhost ~]# vim /etc/cron.d/cacti

Uncomment the line:

 # */5 * * * *  cacti  /usr/bin/php /usr/share/cacti/poller.php > /dev/null 2>&1

Run cacti installer

Now cacti is ready to install. Fire a webbrowser and type the url:
http://192.168.0.X/cacti 

Go to Client Site

Install snmpd

[root@localhost ~]# yum install *snmp*

Copy the file /etc/snmp/snmpd.conf

[root@localhost ~]# cd /etc/snmp/

[root@localhost snmp]# cp snmpd.conf snmpd.conf-org

[root@localhost ~]# vim /etc/snmp/snmpd.conf

modify it as follows Lines and edit

 
 view    systemview    included   .1
 com2sec local     localhost           public
 group MyRWGroup v1         local
 group MyRWGroup v2c        local
 group MyRWGroup usm        local
 view all    included  .1         80
 access MyRWGroup ""      any       noauth    exact  all    all    none
 syslocation Unknown (edit /etc/snmp/snmpd.conf)
 syscontact Root  (configure /etc/snmp/snmp.local.conf)
 pass .1.3.6.1.4.1.4413.4.1 /usr/bin/ucd5820stat

Save and close the file. Turn on snmpd service:

[root@localhost ~]# /etc/init.d/snmpd restart

[root@localhost ~]# /etc/init.d/snmptrapd restart

[root@localhost ~]# chkconfig snmpd on

[root@localhost ~]# chkconfig snmptrapd on

Command run in snmp Server Make sure you are getting information from snmpd:

[root@localhost ~]# snmpwalk -v 1 -c public 192.168.0.10 IP-MIB::ipAdEntIfIndex

Sample ouptut:

IP-MIB::ipAdEntIfIndex.127.0.0.1 = INTEGER: 1

IP-MIB::ipAdEntIfIndex.192.168.0.10 = INTEGER: 2