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 php configuration as per Rocky 9.x Increase default PHP resources

   Optionally enable server concurrency as per Rocky 9.x Configure apache web server for concurrency

4. Start and enable various services

   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 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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