Achieve highest SLA for virtual machines behind the basic load balancers

Question

I am looking to achieve 99.99% SLA for a pair of virtual appliance, so I am using availability zones to deploy the machines. Now we wanted to use basic load balancer in front of these machines, does that affects to our SLA?

How we can still able to achieve highest SLA (99.99%) for those virtual appliances running behind the basic load balancers?

Answer 1

Hi Suwarna,

Basic SKU load balancer does not support Availability Zones. You will need to use Standard SKU if you need that.

Azure Load Balancer SKUs

https://learn.microsoft.com/en-us/azure/load-balancer/skus#skus

Please see article below for more information regarding using load balancer with availability zones:

Load Balancer and Availability Zones

https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-standard-availability-zones

Please click Accept Answer if the above was useful.

Thanks.

-TP

Answer 2

Hei @Suwarna S Kale

Thank you for reaching out to Microsoft Community.

As i understand, you have an appliance that you are running with the help of virtual machines and you need it to have 99.99% availability.

You suggested that you are using "Azure VMs with Availability Zones" and that is good for a disaster recovery scenario but i am not convinced if it is what you need for a load balanced solution.

I suggest you should try "Virtual machine scale set" (and combine it with availability zones too, if needed), it matches your user case.
Azure Virtual Machine Scale Sets let you create and manage a group of load balanced VMs.
Virtual Machine Scale Sets guarantee up to 99.99 percent service-level agreements (SLAs) for your VMs.

PS: if you still want to work with the current setup here is the guide to Upgrade from a basic public to standard public load balancer

Please mark it as "answer" if it helped.