An instance group is a group of virtual machine instances managed as a single entity.
For duplex Communication Manager, create two instance groups. Create one instance group for primary Communication Manager and the other for secondary Communication Manager.
Log on to the Google Cloud Platform.
Navigate to Compute EngineInstance Groups.
Click Create instance group.
Click New unmanaged instance group.
On the Create instance group page, provide the following information:
Name: Name of the instance group.
Zone: Select the zone for the primary Communication Manager.
Region: Select the region of your servers.
Network: Select the network for your virtual machine.
Subnetwork: Select the subnetwork for your virtual machine.
Select VMs: Select the primary Communication Manager virtual machine from the list.
Click Create.
Repeat steps 1 to 5 to create another instance group. For Zone and Select VMs fields, select secondary Communication Manager.
