Azure Load Balancer

 Description: Here I have explained what is Load balancing and How to configure it on Azure

What is Load Balancing: Load balancing means distribute incoming traffic equally to group of servers [Backend Pool] Client's request comes to load balancer and then it distribute to backend server according to traffic. Two types of Load Balancer are available in Azure. 

1.  Internal LB: It work within internal environment 
2.  Public LB: It work with external environment

 Configure Public Load Balancer: Here I will prepared 2 Web server in Ubuntu machine with Name Webserver1 and Webserver2 in Azure and  configure Loadbalancer on same. 

• Navigate to Networking tab and select Load Balancer 

• Fill all require details and create Load balancer

• Add tag to Load Balancer and create load balancer

• Once it configured need to setup back end pool first in loadbalancer

• Add virtual machine to backend pool

• Once Backed pool configure add health probes like in every 5 seconds it will check port 80 and if 2 threshold found then it moved to another server. 

• Now it is time to add Load Balancing Rule 

• We create vitual machine for loadbalacing select availability option "Availability Zone" and in Availability Zone use "1"

• Select Load Balancer under Networking tab and use backendpool and balancer

• Same way create Webserver2 under loadbancer
• Once both virtual machine created you must need to allow port 80 under network security group
• Your loadbalancer is ready you can browse public IP address

• You can disable apahce2 service on one server and test it