Configure basic load balancer for existing VMs

Question

I'm trying to configure a basic load balancer for two of our VMs. In order to do this is looks like I need an availability set. I didn't create on when I created the VMs and it doesn't look like I can assign one to the VMs now.

Do I need to create two more VMs and create the availability set at that point?

Answer 1

Hi,

When you want to load balance traffic between 2 VM for achieving high availability, it is not just enough to put the VMs behind the Load Balancer. You need to have those VMs in an availability set which will basically place the VM in different Fault Domain and Update domains providing high availability.

You can place VMs in an availability set only during the creation and cannot be placed after creation. So you can delete your VM and recreate by placing those VMs in an availability set, so that you can add it behind your basic Load balancer.

Answer 2

@msrini-MSFT I was able to use a script to accomplish what I was looking to do.

I found this one online.
https://learn.microsoft.com/en-us/azure/virtual-machines/windows/change-availability-set?toc=%2Fazure%2Fvirtual-machines%2Fwindows%2Ftoc.json

Answer 3

The virtual machine needs to be placed in an availability set in order to for it to be added to a Load Balancer.