Installing Cacti 0.8.8h and php weathermap 0.98 on CentOS 7

╰+攻爆jí腚メ 2023-10-18 19:19 73阅读 0赞

Overview  
Cacti is an open-source, web-based network monitoring and graphing tool used to get a graph data such as CPU usage, memory usage, network bandwidth utilization, and more. It can graph the network traffic by polling a router or switch using SNMP protocol.  
In this article will show how to install Cacti on CentOS 7. To use PHP weathermap cacti plugin, the Cacti version that need to download is 0.8.8h.  
Prerequisites  
In this tutorial, it is supposed that:  
a. You have already install RHEL/CentOS 7 Linux server up and running. In case that you don’t, you would probably like to read this link. Minimal RHEL/CentOS 7 Installation With Logical Volume Manager (LVM).  
b. You have already done the initial server setup. Please refer to this link Minimal RHEL/CentOS 7 Initial Server Setup.  
Install and Configure Database for Cacti Application  
In CentOS 7, MySQl is moved to MariaDB, execute the following command to install MariaDB.  
yum -y install mariadb-server mariadb-devel  
Enable MariaDB service to start it a the system boot and start its service.

systemctl enable mariadb  
systemctl start mariadb  
Now let do the security hardening of MariaDB by execute the following command.

mysql\_secure\_installation  
We need to create a database and a user for Cacti application and grant it all database privileges.

mysql -u root -p  
create database cacti;  
create user ‘cacti’@‘localhost’ identified by ‘cacti’;  
grant all privileges on cacti.\* to cacti@localhost;  
flush privileges;

Installing Cacti Application  
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm  
yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm  
yum install yum-utils  
yum-config-manager --enable remi-php56 \[Install PHP 5.6\]  
yum install php php-mcrypt php-cli php-gd php-curl php-mysql php-ldap php-zip php-fileinfo  
To install Cacti web application, we need to install some mandatory packages as the following first.

yum -y install php php-cli php-mysql net-snmp-utils rrdtool php-snmp gcc net-snmp-devel autoconf automake libtool dos2unix wget help2man php-gd php-ldap php-pear php-common php-devel php-mbstring net-snmp-utils net-snmp-libs httpd  
Enable Apache service to start it a the system boot and start its service.

systemctl enable httpd  
systemctl start httpd  
Enable SNMP service to start it a the system boot and start its service.

systemctl enable snmpd  
systemctl start snmpd  
Let move to the installation directory for Cacti application, /var/www, download and extract it.

cd /opt  
mkdir cacti  
cd cacti  
wget http://www.cacti.net/downloads/cacti-0.8.8h.tar.gz  
tar -xzvf cacti-0.8.8h.tar.gz  
It is recommended to create a symbolic link to the extracted directory of Cacti application “cacti-1.1.10”. So, it will make us easy to upgrades Cacti to a newer versions.

mv cacti-0.8.8h cacti  
Also, we need to create a user for Cacti application and make sure that the permissions on the log and rra directories are set correctly as the following.

adduser -d /opt/cacti -s /sbin/nologin cacti  
chown -R apache:apache /opt/cacti  
chown -R cacti /opt/cacti/cacti/rra  
Now we need to add a cron entry for a 1 minute polling interval of Cacti application using the following command.

vim /etc/cron.d/cacti  
\*/1 \* \* \* \* cacti php /opt/cacti/cacti/poller.php --debug --force &>/dev/null

Or：

su – cacti  
$ crontab -e  
/bin/php /opt/cacti/cacti/poller.php --debug –force

\*/1 \* \* \* \* /usr/bin/php /opt/cacti/cacti/poller.php --debug –force > /dev/null 2>&1  
Now, let import Cacti application database into the database created using the following command.

mysql -p cacti < /opt/cacti/cacti/cacti.sql  
Next, we need to change some settings for database credentials in configuration file of Cacti application.

vim /opt/cacti/cacti/include/config.php  
$database\_type = ‘mysql’;  
$database\_default = ‘cacti’;  
$database\_hostname = ‘localhost’;  
$database\_username = ‘cacti’;  
$database\_password = ‘cacti’;  
$database\_port = ‘3306’;  
$database\_ssl = false;  
Next, we need to open HTTP port 80 on IPTables.

vim /etc/sysconfig/iptables  
\-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT

systemctl restart iptables  
iptables -L -n -v  
Usually, 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. Edit file /etc/php.ini as the following.

vim /etc/php.ini  
date.timezone = Asia/Shanghai  
log\_errors = syslog  
Then, we need to restart Apache service.

systemctl restart httpd  
We also need to disable SELinux.

vim /etc/selinux/config  
SELINUX=disabled

reboot  
Configure VHost for Cacti Application  
To create a VHost for Cacti application, create a \*.conf file in directory /etc/httpd/conf.d as the following.  
vim /etc/httpd/conf.d/cacti.conf  
<VirtualHost \*>  
DocumentRoot /opt/cacti/  
ServerName cacti.domain.com  
CustomLog /opt/cacti/logs/access\_log combined  
ErrorLog /opt/cacti/logs/error\_log  
<Directory “/opt/cacti/”>  
AllowOverride All  
Options FollowSymLinks MultiViews  
Require all granted

Then, we need to restart Apache service.

systemctl restart httpd  
Finally, we are ready to install Cacti application. In your broswer, in the address box type in http://cacti.techspacekh.com and the following windows appears.

Cacti Default Password Default Username and password of Cacti Web Admin in Ubuntu Debian or Windows Default URL : User Name : admin Password : admin  
Change the password to cacti  
6. Installing weathermap

cd /opt/cacti/  
ls  
cacti-0.8.8h.tar.gz  
php-weathermap-0.98.zip

unzip php-weathermap-0.98.zip  
mv weathermap/ /opt/cacti/cacti/plugins/  
chown -R apache configs/  
chown -R cacti output/  
6.1 enable weathermap  
登录cacti界面，Console ->Plugin Management，再点击Actions即可

如下图，标识Weathermap安装成功（有weathermap页签，状态是active）

6.2 修改配置文件editor.php  
vi editor.php  
$ENABLED=true;