Let’s Balance VM(IaaS) load through Load Balancer

Whenever we talk about workload in VM , Balancing load is an another factor , Azure provide (L4)load balancer to balance the load between VM’s or High Availability Group or VM scale Set .

Definition : Azure Load Balancer delivers high availability and network performance to your applications. It is a Layer 4 (TCP, UDP) load balancer that distributes incoming traffic among healthy instances of services defined in a load-balanced set.

One thing keep in Mind Load Balancer is for IaaS and Traffic Manager is for PaaS or Mix environment .

There are two kind of Load Balancer in Azure , One is Public or External Load balancer and 2nd is Private or Internal Load Balancer .

Let’s do a small practical to test Load balancer :

1. Create two VM in same HA and Same Resource Gruop
2. Open NSG and open port 80
3. Once your VM is ready take the RDP of your VM and install IIS
4. Once IIS installed , open IIS manager and Expend your default website and click on explore
5. Once default page is there , click on Explore and do small changes so that you can identify the IIS page .
6. But make sure both VM should manage same kind of workload and both should be in same HA .
7. No go to azure load balancer and create a public or external load balancer .
8. Once your LB is created , open the LB and click on backend pool . Now click on ADD and select your existing HA . then select your both VM and save the config .
9. Then create a health probe with default config .
10. Wait until LB update your configuration .
11. Now create a Load Balancing rule with TCP .

Your Load Balancer is ready to perform . Now open Load Balancer overview and check LB public ip . Hit public ip of LB you will get responce from HA ( VM1 or VM1 ).

Having Issue ?? Please write me .