How to Install Zabbix Agent on CentOS/RHEL 8

Zabbix Agent can provide great linux system monitor system once installed, here is the steps to install it :

SElinux is enable by default, You can disable the SELinux by editing /etc/selinux/config file:

nano /etc/selinux/config

Change the following line:

SELINUX=disabled

Now install zabbix repository (in the demo it is 5.4):

rpm -Uvh https://repo.zabbix.com/zabbix/5.4/rhel/8/x86_64/zabbix-release-5.4-1.el8.noarch.rpm
dnf clean all
dnf -y install zabbix-agent

Now you need to edit the config file to point to your Zabbix server :

nano /etc/zabbix/zabbix_agentd.conf

#Server=[zabbix server ip]
#Hostname=[ Hostname of client system ]

Server=192.168.1.100   
Hostname=the name you gave this linux when created in zabbix server

You need to open the firewall for traffic between this station and the zabbix server :

firewall-cmd --permanent --add-port=10050/tcp
firewall-cmd --reload

Now enable and start the agent :

systemctl enable zabbix-agent
systemctl start zabbix-agent

Sometime allowing agent as root is not enough and you need to configure the service running as root