Conf-tar

Install Cacti .tar file & SNMP

# yum remove php-common [ install php 7 ]

yum -y install epel-release

yum -y update

rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

yum -y update

# yum -y install httpd*

systemctl start httpd

systemctl enable httpd

yum -y install php71w php71w-snmp php71w-mysqli php71w-cli php71w-ldap php71w-xml php71w-session php71w-sockets php71w-pcre php71w-gd php71w-dom php71w-posix php71w-mbstring libc-client php71w-imap php71w-intl

yum -y install net-snmp net-snmp-utils

# php -v

rm -f /etc/localtime

ln -s /usr/share/zoneinfo/UTC /etc/localtime

# vi /etc/php.ini

[Date]

; Defines the default timezone used by the date functions

; http://php.net/date.timezone

date.timezone = Asia/Dhaka

# vi /etc/my.cnf [and add bellow lines.]

[mysqld]

default_time_zone=Asia/Dhaka

yum -y install mariadb mariadb-server

systemctl start httpd.service

systemctl start snmpd.service

systemctl start mariadb.service

systemctl enable httpd.service

systemctl enable snmpd.service

systemctl enable mariadb.service

systemctl restart httpd.service

systemctl restart snmpd.service

systemctl restart mariadb.service

# mysql -u root -p

MariaDB> CREATE DATABASE cactidb;

MariaDB> CREATE USER 'cactiuser'@'localhost' IDENTIFIED BY 'cactipassword';

MariaDB> GRANT ALL PRIVILEGES ON cactidb.* TO 'cactiuser'@'localhost';

MariaDB> FLUSH PRIVILEGES;

MariaDB> exit

# mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root -p mysql

# mysql -u root -p

MariaDB> use mysql;

mysql> GRANT SELECT ON mysql.time_zone_name TO 'cacti_user'@'localhost';

mysql> FLUSH PRIVILEGES;

mysql> exit

cd /var/www/html

wget https://www.cacti.net/downloads/cacti-latest.tar.gz

# tar xzvf cacti*.tar.gz

mv cacti-1*/ cacti/

cd /var/www/html/cacti

# mysql -u cactiuser -p cactidb < /var/www/html/cacti/cacti.sql

password:

# vi /var/www/html/cacti/include/config.php

database_default = "cactidb";

database_hostname = "localhost";

database_username = "cactiuser";

database_password = "cactipassword";

# chown -R apache:apache /var/www/html/cacti

# yum -y update net-snmp net-snmp-utils

# cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak

# vi /etc/snmp/snmpd.conf

------------------------------------------------------

# line 41: comment out

# com2sec notConfigUser default public

# line 74,75: uncomment and change

# change "mynetwork" to your own network

# change comunity name to anyone except public, private (for security reason)

com2sec local localhost worldcm

com2sec mynetwork 10.0.0.0/24 worldcm

# line 78,79: uncomment and change

group MyRWGroup v2c local

group MyROGroup v2c mynetwork

# line 85: uncomment

view all included .1 80

# line 93,94: uncomment and change

access MyROGroup "" v2c noauth exact all none none

access MyRWGroup "" v2c noauth exact all all all

------------------------------------------------------------

systemctl start snmpd

systemctl enable snmpd

systemctl restart snmpd

[root@~]# snmpwalk -v 2c -c worldcm -O e 127.0.0.1

http://Your_Server_IP/cacti

User $ passwd: admin

#############################################################

Install Cacti on CentOS 6/7

Step 1 – Prerequisites

First we need to install some of the software packages needed for Cacti to run properly. Software which is not included or enabled in the base CentOS 6 installation are:

- rrdtool
- apache
- mysql
- cron
- gcc

Let’s use yum to get these installed.

Centos 6: yum -y install mysql-server php php-cli php-mysql net-snmp-utils rrdtool \ php-snmp gcc mysql-devel net-snmp-devel autoconf automake libtool dos2unix wget help2man Centos 7: yum -y install mariadb-server php php-cli php-mysql net-snmp-utils rrdtool \ php-snmp gcc mariadb-devel net-snmp-devel autoconf automake libtool dos2unix wget help2man

gcc and the devel packages are required for the installation of spine, hence that’s why we include it here.

Now let’s make sure that our webserver and the database are automatically starting up after a reboot. Use the following commands to enable these:

CentOS 6: chkconfig httpd on chkconfig mysqld on CentOS 7: systemctl enable httpd.service systemctl enable mariadb.service

Now that we did make sure that these services start after a reboot, let’s start them manually now in order to continue the installation. Cron may already be running so don’t panic if you don’t see the usual start message:

CentOS 6: service httpd restart service mariadb restart CentOS 7: systemctl restart httpd.service systemctl restart mariadb.service

Step 2 – Cacti Files

Let’s now move to the actualy installation of Cacti. First we need to download and extract it. As of version 0.8.8, a fully patched Cacti including the Plugin Architecture (PIA) is officially available, so we’re downloading that one:

cd /var/www/html wget http://www.cacti.net/downloads/cacti-0.8.8h.tar.gz tar -xzvf cacti-0.8.8h.tar.gz

I usually suggest to create a symbolic link to the newly created directory “cacti-0.8.8h”. This will make upgrades to never Cacti versions easier:

ln -s cacti-0.8.8h cacti

Step 3 – Cron and file permissions

Cacti uses cron (scheduled task) in order to execute its polling process. It’s always a good idea to run this under a special user. Let’s create the system “cacti” user now:

adduser -d /var/www/html/cacti -s /sbin/nologin cacti

Having done that, we can now add a new cron entry to your system for a 5 minute polling interval using the following command:

echo "*/5 * * * * cacti php /var/www/html/cacti/poller.php &>/dev/null" >> /etc/cron.d/cacti

Finally, we also need to make sure that the permissions on the log and rra directories are set correctly:

cd /var/www/html/cacti chown -R cacti.apache rra log chmod 775 rra log

Step 4 – Cacti Database

Now that we have extracted the cacti files, we can move on preparing the database for the final installation step. Your first step should be securing the mysql database. The following command will help you with this task on a CentOS system. Make sure to select a strong password for root, e.g. MyN3wpassw0rd

/usr/bin/mysql_secure_installation

Let’s create a new database and assign a special user to it:

mysqladmin -u root -p create cacti mysql -p cacti < /var/www/html/cacti/cacti.sql mysql -u root -p

With the last command, you should be seing a mysql prompt where you can enter mysql commands. Here we are going to create the special cacti user. That user only needs to be able to connect from the local system and should have a strong password as well. Enter the following commands and make sure to replace the password:

GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY 'MyV3ryStr0ngPassword'; flush privileges; exit

We now have the cacti files and the cacti database setup. The last step before moving to the web-based installer is setting the database credentials within the Cacti config file:

cd /var/www/html/cacti/include/ vi config.php

Change the $database_ lines to fit your new settings:

$database_type = "mysql"; $database_default = "cacti"; $database_hostname = "localhost"; $database_username = "cactiuser"; $database_password = "MyV3ryStr0ngPassword"; $database_port = "3306"; $database_ssl = false;

Depending on your installation, you should also uncomment the following line. In our example we have to make sure the following line is there:

$url_path = "/cacti/";

Step 5 – Adding firewall rules

The following settings will add access rules to http and https from outside:

Centos 7: firewall-cmd --permanent --zone=public --add-service=https firewall-cmd --permanent --zone=public --add-service=http firewall-cmd --reload

Step 6 – Important PHP Settings

The default PHP installation usually has not configured the correct timezone or php error reporting. While not required to run Cacti, it’s highly recommended to enable error reporting to syslog for troubleshooting issues with plugins or other scripts.

The following lines need to be enabled/configued in your /etc/php.ini file:

; Defines the default timezone used by the date functions ; http://php.net/date.timezone date.timezone = Europe/Berlin

and

; Log errors to syslog (Event Log on NT, not valid in Windows 95). error_log = syslog

Step 7 – Running the Web-based installer

Let’s move on to the web-based installer.