Azure Load balancer

 

The very basic type of load balancer in Azure is the Azure Load Balancer

A Public load balancer can provide outbound connections for virtual machines (VMs) inside your virtual network.

Private IP addresses are translated to public IP addresses when a Public load balancer is used.

An Internal or Private load balancer is used where private IPs are needed at frontend.

These are used to load balance inside a virtual network.

Here are some features of Azure Load balancer:

1. An Azure load balancer is a Layer-4 (TCP, UDP) load balancer that provides high availability by distributing incoming traffic among healthy VMs
2. A load balancer health probe monitors a given port on each VM and only distributes traffic to an operational VM.
3. You define a front-end IP configuration that contains one or more public IP addresses. This front-end IP configuration allows your load balancer and applications to be accessible over the Internet.
4. Virtual machines connect to a load balancer using their virtual network interface card (NIC). To distribute traffic to the VMs, a back-end address pool contains the IP addresses of the virtual (NICs) connected to the load balancer.
5. To control the flow of traffic, you define load balancer rules for specific ports and protocols that map to your VMs.