ZABBIX Server v3.0 installation on CentOS7 Step-By-Step manual

Опубликовано: 18 Февраль 2026
на канале: Aleksandrs Mortulevs

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1. OS
a. Linux CentOS 7
b. Update it
c. Prerequisites
d. Database
e. Secure it

2. Zabbix 3.0 using MySQL database, MariaDB
a. install Zabbix
b. connect to database
c. configure front-end
d. secure server
e. finish configuration

Install basic server and configure it
CentOS Download - https://www.centos.org/download/
http://isoredirect.centos.org/centos/...

Set IP and activate adapters if required
nmtui

#connect using SSH/Telnet

Change time zone if not done jet
mv /etc/localtime /etc/localtime.bak
ln -s /usr/share/zoneinfo/Europe/Riga /etc/localtime

#Check swap file
free -m

#Create swap file
dd if=/dev/zero of=/swapfile1 bs=1024 count=524288
chown root:root /swapfile1
chmod 0600 /swapfile1
mkswap /swapfile1
swapon /swapfile1
free -m

To activate /swapfile1 after Linux system reboot
vi /etc/fstab
#Append the following line:
/swapfile1 none swap sw 0 0

Update CentOS - take some ~5-10 minutes..
yum update -y

Install some useful packages
yum install vim -y

#Install MySQL fork Mariadb
yum install mariadb-server -y

Edit MySQL config file and add innodb_file_per_table under [mysqld] section
vim /etc/my.cnf
innodb_file_per_table

#Start MySQL and secure it (by default database root has no password)
systemctl start mariadb
mysql_secure_installation

#create zabbix database and user
mysql -p
CREATE DATABASE zabbix CHARACTER SET utf8 COLLATE utf8_bin;
GRANT ALL PRIVILEGES ON zabbix.* TO zabbix@localhost IDENTIFIED BY 'PasswordHere';
flush privileges;
exit

#Installation of Firewall
yum install firewalld -y
systemctl unmask firewalld
systemctl enable firewalld
systemctl start firewalld

allow connections to ports 10051 (Zabbix server), 10050 (Zabix agent), 80 (HTTP) 443 (HTTPS) in firewalld
firewall-cmd --permanent --zone=public --add-port=10051/tcp
firewall-cmd --permanent --zone=public --add-port=10050/tcp
firewall-cmd --permanent --zone=public --add-port=80/tcp
firewall-cmd --permanent --zone=public --add-port=443/tcp
firewall-cmd --reload

==========================================
Install Zabbix packages on CentOS/RHEL 7

Download Zabbix 3.0 configuration package
rpm -ivh http://repo.zabbix.com/zabbix/3.0/rhe...

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

Import initial DB schema and data (Zabbix version can be different, so check folder name)
cd /usr/share/doc/zabbix-server-mysql-3.0.3
zcat create.sql.gz | mysql -uroot -p zabbix

Edit database configuration in zabbix_server.conf
vim /etc/zabbix/zabbix_server.conf
DBHost=localhost (better change to IP)
DBName=zabbix
DBUser=zabbix
DBPassword=your password for DB user "zabbix"

Edit PHP timezone
vim /etc/httpd/conf.d/zabbix.conf

php_value max_execution_time 300
php_value memory_limit 128M
php_value post_max_size 16M
php_value upload_max_filesize 2M
php_value max_input_time 300
php_value always_populate_raw_post_data -1
php_value date.timezone Europe/Riga

It's necessary to uncomment the “date.timezone” setting and set the right timezone for you.

After changing the configuration file restart the apache web server.
systemctl start httpd

Start Zabbix server process
systemctl start zabbix-server

#check the status
systemctl status zabbix-server -l

Start Zabbix agent process.
systemctl start zabbix-agent

Set SELinux settings - recommended, but can make trouble if not configured))
getenforce
setsebool -P httpd_can_network_connect=1
setsebool -P httpd_can_connect_zabbix=1
setsebool -P zabbix_can_network=1

getsebool -a | grep zabbix
getsebool -a | grep httpd_can_network_connect

Add all Zabbix services to server startup
systemctl list-unit-files

systemctl enable zabbix-server.service
systemctl enable zabbix-agent.service
systemctl enable zabbix-java-gateway.service
systemctl enable httpd.service
systemctl enable mariadb

#Ready to go to http://ipaddress/zabbix to finish setup
Server name: name of Zabbix server instance (will see it in the right up corner, under logout) Example: zbx_prod01, zbx_test01, zbx3.0.centos7 etc.

Default user: Admin
password: zabbix

/etc/zabbix/web/zabbix.conf.php

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Br, Alexander