VM scale sets
VMSSes are Azure compute resources that you can use to deploy and manage a set of identical VMs. With all VMs configured in the same way, scale sets are designed to support true autoscaling, and no pre-provisioning of VMs is required. It helps in provisioning multiple identical VMs that are connected to each other through a virtual network and subnet.
A VMSS consists of multiple VMs, but they are managed at the VMSS level. All VMs are part of this unit and any changes made are applied to the unit, which, in turn, applies it to those VMs that are using a predetermined algorithm:
Figure 2.12: A VM scale set
This enables these VMs to be load balanced using an Azure load balancer or an application gateway. The VMs could be either Windows or Linux VMs. They can run automated scripts using a PowerShell extension and they can be managed centrally using a state configuration. They can be monitored as a unit, or individually...
