Azure DNS

• Azure DNS is a hosting service for DNS domains that provides name resolution
• Lets create a public zone
• Create a vm and install any application like apache or nginx. In this example i would be installing apache

sudo apt update
sudo apt install apache2 -y

• Now lets add A record set in the DNS Zone

Azure Load balancer

• Create a vmss with 2 vms running apache server
• Create a loadbalancer (AllServices => Load Balancing)
• Lets add a health probe & backend pool
• Now lets add load balancing rules
• Now navigate to the loadbalancer ip

Azure Application Gateway

• Refer Here