How to Install Zabbix Server 4.0 on CentOS 7

Introduction:

Zabbix is an open source monitoring solution which allows you to real-time monitor millions of matrices collected from thousands of servers, virtual machines and network devices.

Zabbix able to collect matrices from any devices, systems and applications using Zabbix agent, SNMP protocol and IPMI agents. Which can monitor Services, Hardware, Virtual Machines, Databases and Applications. Zabbix provides web interface with widget-based dashboards, graphs, network maps, slide shows.

Zabbix is a powerful open source monitoring solution used to monitor server applications, systems, Network devices, Hardware appliances, IoT devices.

Zabbix Server & Client Architecture

The server communicates with the native software agents which available for Linux, Windows operating systems.

Zabbix can communicate without an agent via Simple Network Management Protocol (SNMP) or Intelligent Platform Management Interface (IPMI)

Zabbix Server Depends on 3 Software Applications

1. Apache Web Server

2. PHP with required extensions

3. MySQL/MariaDB Database Server

Environment:

Hostname = zabbix.digitalavenue.com IP Address = 192.168.100.150 OS = CentOS 7 / RHEL 7

STEP 1: Configure Prerequisites

1. Install EPEL Release

[root@zabbix ~]# yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

2. Update an Operating System

3. Set Resolvable Hostname

4. Set SELINUX to Permissive Mode

[root@zabbix /]# vim /etc/selinux/config 
SELINUX=permissive

[root@zabbix /]# reboot

STEP 02: Install Apache HTTPD Web Server

Install “httpd” yum package

[root@zabbix ~]# yum -y install httpd

Start and enable apache service on reboot

[root@zabbix ~]# systemctl enable httpd.service
[root@zabbix ~]# systemctl start httpd.service

Allow apache service through firewall

[root@zabbix ~]# firewall-cmd --permanent --add-service=http
[root@zabbix ~]# firewall-cmd --permanent --add-service=https
[root@zabbix ~]# firewall-cmd --reload

Test apache web service is up and running HTTP will start to listen on port 80

[root@zabbix ~]# netstat -tulpen | grep httpd

Access webpage through a web browser

http://your_server_ip_address/

STEP 03: Install and Configure PHP

Install PHP Dependencies for Zabbix Server

PHP used to gather matrices from MariaDB/Mysql database and process to display dynamic content via apache web server.

sudo yum -y install php php-pear php-cgi php-common php-mbstring php-snmp php-gd php-xml php-mysql php-gettext php-bcmath

Configure PHP:

[root@zabbix ~]# vim /etc/php.ini 
max_execution_time = 600
max_input_time = 600
memory_limit = 1024M
post_max_size = 32M
upload_max_filesize = 32M
date.timezone = Asia/Colombo

[root@zabbix ~]# vim /var/www/html/info.php
<?php phpinfo(); ?>

[root@zabbix ~]# systemctl restart httpd.service

Open web browser and access following web page. And you should see page like below.

http://your_server_IP_adress/info.php

STEP 04: Install MariaDB Database Server

Add MariaDB YUM repository to CentOS 7 server

Genarete Repositery using this URL:

https://downloads.mariadb.org/mariadb/repositories/#mirror=truenetwork&distro=CentOS&distro_release=centos7-amd64--centos7&version=10.3

# MariaDB 10.3 CentOS repository list - created 2019-04-01 15:07 UTC
# http://downloads.mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.3/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

Run Following Commands optinally…

Install MariaDB

sudo yum -y install MariaDB-server MariaDB-client

Start and enable Mariadb/MySQL service on reboot.

[root@zabbix ~]# systemctl start mariadb.service
[root@zabbix ~]# systemctl enable mariadb.service

Allow MariaDB/MySQL service through firewall.

[root@zabbix ~]# firewall-cmd --permanent --add-service=mysql 
[root@zabbix ~]# firewall-cmd –reload

MariaDB Initial configuration:

[root@zabbix ~]# mysql_secure_installation

`Set root password? [Y/n] Y

New password:

Re-enter new password:

Remove anonymous users? [Y/n] Y

Disallow root login remotely? [Y/n] Y

Reload privilege tables now? [Y/n] Y`

Log into MariaDB Server:

[root@zabbix ~]# mysql -uroot -p

MariaDB [(none)]> select version();

+—————-+ | version() | +—————-+ | 10.4.3-MariaDB |

[root@zabbix ~]# mysql -V
mysql  Ver 15.1 Distrib 10.4.3-MariaDB, for Linux (x86_64) using readline 5.1

STEP 05: Create “zabbixdb” Database and “zabbixuser” User

Create a Zabbix user and Zabbix database for Zabbix Installation. In this case I have used “zabbixuser” as a user and “zabbixdb” as a database.

[root@zabbix ~]# mysql -uroot -p
Enter password: 

MariaDB [(none)]> CREATE DATABASE zabbixdb CHARACTER SET UTF8 COLLATE UTF8_BIN;

MariaDB [(none)]> GRANT ALL PRIVILEGES ON zabbixdb.* to zabbixuser@'localhost' IDENTIFIED BY 'PASSWORD';

MariaDB [(none)]> GRANT ALL PRIVILEGES ON zabbixdb.* to zabbixuser@'%' IDENTIFIED BY 'PASSWORD';

MariaDB [(none)]> FLUSH PRIVILEGES;

MariaDB [(none)]> QUIT;

STEP 06: INSTALL ZABBIX 4.0

Import GPG-KEY

rpm --import http://repo.zabbix.com/RPM-GPG-KEY-ZABBIX

**Install zabbix-release repository**

rpm -ivh https://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-1.el7.noarch.rpm

Install Zabbix Server

yum install zabbix-server-mysql zabbix-web-mysql zabbix-agent zabbix-get zabbix-sender zabbix-java-gateway -y

Import Zabbix Server Databas Schema

[root@zabbix ~]# zcat /usr/share/doc/zabbix-server-mysql-4.0.5/create.sql.gz | mysql -uzabbixuser -p zabbixdb

This may take while to import the database schema. Please wait….

STEP 07: CONFIGURE ZABBIX SERVER

Configure Zabbix Server Main Configuration File

[root@zabbix ~]# vim /etc/zabbix/zabbix_server.conf 

## DATABASE NAME 
DBName=zabbixdb

## DATABASE USERNAME
DBUser=zabbixuser

## DATABASE PASSWORD
DBPassword=PASSWORD

sudo systemctl restart httpd zabbix-server
sudo systemctl enable zabbix-server

SET ZABBIX SERVER NAME:

[root@zabbix ~]# vim /etc/httpd/conf/httpd.conf 

ServerName zabbix.digitalavenue.com:80

ServerAdmin zabbix@digitalavenue.com

[root@zabbix ~]# systemctl restart httpd.service

CONFIGURE ZABBIX FRONTEND:

Apache configuration file forZabbix server located in

/etc/httpd/conf.d/zabbix.conf

Some PHP settings have to be configured.

[root@zabbix ~]# vim /etc/httpd/conf.d/zabbix.conf 
        php_value max_execution_time 600
        php_value memory_limit 1024M
        php_value post_max_size 32M
        php_value upload_max_filesize 32M
        php_value max_input_time 600
        php_value max_input_vars 10000
        php_value always_populate_raw_post_data -1
        php_value date.timezone Asia/Colombo

Allow MariaDB/MySQL service through firewall.

[root@zabbix ~]# firewall-cmd --permanent --add-port={10050/tcp,10051/tcp}
[root@zabbix ~]# firewall-cmd --reload
[root@zabbix ~]# systemctl restart httpd.service

Now, Zabbix Server Installation completed. Move onto you web browser and access Zabbix frontend and follow the on display guidelines.

Access Zabbix URL using web browser. And follow the instruction as seen on installation wizard.

http://zabbix_server_IP/zabbix/setup.php

Default Zabbix Username: Admin

Default Zabbix Password: zabbix

Provide the database name and username.

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