When deploying a cluster to Azure, a new Proximity Placement Group (PPG) is created for configurations that do not span multiple availability zones, including use of an availability set or a single availability zone.
You can also deploy a cluster to use an existing PPG within your subscription. This can be useful when you need to co-locate FlashGrid Cluster with other application resources within the same Azure data centre.
To use an existing PPG, manually add the following entry to your FlashGrid configuration file prior to generating ARM template with Launcher (specify the full path to your existing PPG):
use_proximity_placement_group = True
existing_proximity_placement_group = '/subscriptions/f5ddef9a-454ss-f932-b0b8-9d3342/resourceGroups/ppg-test/providers/Microsoft.Compute/proximityPlacementGroups/ppg-existing'