AZure iLB and AWS LB a comparison

Azure Load Balancer
It is a Layer 4 (TCP, UDP) load balancer that distributes incoming traffic among healthy instances of services defined in a load-balanced set.
Azure Load Balancer can be configured to:

Load balance incoming Internet traffic to virtual machines. This configuration is known as Internet-facing load balancing.
Load balance traffic between virtual machines in a virtual network, between virtual machines in cloud services, or between on-premises computers and virtual machines in a cross-premises virtual network. This configuration is known as internal load balancing.
Forward external traffic to a specific virtual machine.
All resources in the cloud need a public IP address to be reachable from the Internet. The cloud infrastructure in Azure uses non-routable IP addresses for its resources. Azure uses network address translation (NAT) with public IP addresses to communicate to the Internet.

Azure Load Balancer is configured differently Azure classic and Resource Manager deployment models.

Azure classic deployment model

Virtual machines deployed within a cloud service boundary can be grouped to use a load balancer. In this model a public IP address and a Fully Qualified Domain Name, (FQDN) are assigned to a cloud service. The load balancer does port translation and load balances the network traffic by using the public IP address for the cloud service.

Load-balanced traffic is defined by endpoints. Port translation endpoints have a one-to-one relationship between the public-assigned port of the public IP address and the local port assigned to the service on a specific virtual machine. Load balancing endpoints have a one-to-many relationship between the public IP address and the local ports assigned to the services on the virtual machines in the cloud service.

Azure Resource Manager deployment model

In the Resource Manager deployment model there is no need to create a Cloud service. The load balancer is created to explicitly route traffic among multiple virtual machines.

A public IP address is an individual resource that has a domain label (DNS name). The public IP address is associated with the load balancer resource. Load balancer rules and inbound NAT rules use the public IP address as the Internet endpoint for the resources that are receiving load-balanced network traffic.

A private or public IP address is assigned to the network interface resource attached to a virtual machine. Once a network interface is added to a load balancer’s back-end IP address pool, the load balancer is able to send load-balanced network traffic based on the load-balanced rules that are created.


Azure iLB Features


Elastic Load Balancing
Elastic Load Balancing automatically distributes incoming application traffic across multiple Amazon EC2 instances.
Elastic Load Balancing offers two types of load balancers that both feature high availability, automatic scaling, and robust security.

Classic Load Balancer
High Availability
You can distribute incoming traffic across your Amazon EC2 instances in a single Availability Zone or multiple Availability Zones. The Classic Load Balancer automatically scales its request handling capacity in response to incoming application traffic.



Application Load Balancer
Content-Based Routing
If your application is composed of individual services, an Application Load Balancer can route a request to a service based on the content of the request.

Containerized Application Support
You can now configure an Application Load Balancer to load balance containers across multiple ports on a single EC2 instance. Amazon EC2 Container Service (ECS) allows you to specify a dynamic port in the ECS task definition, giving the container an unused port when it is scheduled on the EC2 instance. The ECS scheduler automatically adds the task to the ELB using this port.



AWS ELB Features



Posted on February 28, 2017, in Cloud. Bookmark the permalink. Leave a comment.

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