CentOS 8.x Zabbix installation

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To install Zabbix on centOS 8 use:

1. Disable SELinux (setenforce 0, /etc/sysconfig/selinux: SELINUX=disabled)
2. Install required web server with php and database

   dnf install -y httpd mariadb-server php php-cli php-common php-mbstring php-mysqlnd php-xml php-bcmath php-devel php-pear php-gd

3. Edit following php configuration values:

   memory_limit 256M
   upload_max_filesize 16M
   post_max_size 16M
   max_execution_time 300
   max_input_time 300
   max_input_vars 10000
   date.timezone = Asia/Kolkata

4. Start and enable various services

   <pre>

   systemctl start httpd

   systemctl start mariadb

   systemctl enable httpd

   systemctl enable mariadb

5. Lock MySQL installation using:

   mysql_secure_installation

   There is no existing mysql password, set new password and accept (Y) default for all other queries

6. Create DB for zabbix using:
   1. Start mysql client

      mysql -u root -p

   2. Create user and database

      CREATE DATABASE zabbix CHARACTER SET utf8 collate utf8_bin;
      GRANT ALL PRIVILEGES ON zabbix.* TO zabbix@localhost IDENTIFIED BY '<secret-zabbix-db-password>';
      flush privileges;
      exit;

7. Install libssh2

   yum -y install epel-release
   yum -y install libssh2

8. Install Zabbix repository based on latest compatible version from http://repo.zabbix.com/zabbix/5.2/rhel/8/x86_64/

   dnf install -y rpm -Uvh https://repo.zabbix.com/zabbix/5.2/rhel/8/x86_64/zabbix-release-5.2-1.el8.noarch.rpm

9. Install zabbix server and agent

   dnf install -y zabbix-server-mysql zabbix-web-mysql zabbix-agent zabbix-apache-conf

10. Start and enable zabbix processes

    systemctl restart zabbix-server zabbix-agent httpd php-fpm
    systemctl enable zabbix-server zabbix-agent httpd php-fpm

11. Initialize Zabbix DB

    cd /usr/share/doc/zabbix-server-mysql
    zcat create.sql.gz | mysql -u zabbix -p zabbix

    Enter <secret-zabbix-db-password> specified while creating zabbix user

12. Edit /etc/zabbix/zabbix_server.conf and specify DBpassword

    DBPassword=<secret-zabbix-db-password>

    Enter <secret-zabbix-db-password> specified while creating zabbix user

13. Configure timezone for Zabbix in PHP by editing /etc/php-fpm.d/zabbix.conf

    php_value[date.timezone] = Asia/Kolkata

14. Restart various processes

    systemctl restart zabbix-server
    systemctl restart zabbix-agent
    systemctl restart php-fpm
    systemctl restart httpd
    systemctl restart mariadb

15. Configure firewall rules for Zabbix

    firewall-cmd --permanent --add-service=http
    firewall-cmd --permanent --add-port=10050/tcp
    firewall-cmd --permanent --add-port=10051/tcp
    firewall-cmd --reload

16. Access Zabbix UI at http://<server-fqdn-or-ip>/zabbix/

    Leave most settings default except DB-password <secret-zabbix-db-password> and desired Name for Zabbix server

17. Login with Admin/zabbix

Refer:

• https://tecadmin.net/install-zabbix-server-centos-8/

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