Add option to group ec2 instances by platform. (ansible#27848)

All credits to https://github.com/felipecvo

See PR: ansible#14246

contrib/inventory/ec2.ini

@@ -135,6 +135,7 @@ group_by_aws_account = False
 group_by_ami_id = True
 group_by_instance_type = True
 group_by_instance_state = False
+group_by_platform = True
 group_by_key_pair = True
 group_by_vpc_id = True
 group_by_security_group = True

contrib/inventory/ec2.py

@@ -930,6 +930,16 @@ def add_instance(self, instance, region):
             if self.nested_groups:
                 self.push_group(self.inventory, 'instance_states', state_name)
 
+        # Inventory: Group by platform
+        if self.group_by_platform:
+            if instance.platform:
+                platform = self.to_safe('platform_' + instance.platform)
+            else:
+                platform = self.to_safe('platform_undefined')
+            self.push(self.inventory, platform, hostname)
+            if self.nested_groups:
+                self.push_group(self.inventory, 'platforms', platform)
+
         # Inventory: Group by key pair
         if self.group_by_key_pair and instance.key_name:
             key_name = self.to_safe('key_' + instance.key_name)