Installing Keepalived on CentOS 8

Keepalived is an open-source routing software that provides simple and robust facilities for load balancing and high-availability to Linux-based systems or clusters. It is often used in conjunction with tools like HAProxy or Nginx to manage network traffic efficiently.

Follow the steps below to install Keepalived on CentOS 8:

sudo dnf update -y

sudo dnf install -y keepalived

Create a configuration file for Keepalived:

sudo vi /etc/keepalived/keepalived.conf

Here is an example configuration file:

! Configuration File for keepalived

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass your_password
    }
    virtual_ipaddress {
        192.168.1.10
    }
}

Make sure to replace eth0 with your network interface name and set a desired password for authentication. Also, modify the virtual IP address to your preferred value.

sudo systemctl enable --now keepalived

1. Update the system packages:
2. Install the required packages:
3. Configure Keepalived:
4. Enable and start the Keepalived service:

After following these steps, Keepalived will be installed and configured on your CentOS 8 system. You can now utilize its load balancing and high-availability capabilities to enhance your network infrastructure.