Ensure Throughput setting is honoured on gp3 volumes

Author: jhixson74

pkg/actuators/machine/instances.go

@@ -316,6 +316,7 @@ func getBlockDeviceMappings(machine runtimeclient.ObjectKey, blockDeviceMappingS
 		}
 
 		// IOPS settings are only valid on IO1, IO2 and GP3 block devices
+		// Throughput settings are only valid on GP3 block devices
 		// https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/create-volume.html
 		switch aws.StringValue(volumeType) {
 		case ec2.VolumeTypeIo1, ec2.VolumeTypeIo2, ec2.VolumeTypeGp3:
@@ -325,6 +326,9 @@ func getBlockDeviceMappings(machine runtimeclient.ObjectKey, blockDeviceMappingS
 			if blockDeviceMappingSpec.EBS.Iops != nil && *blockDeviceMappingSpec.EBS.Iops > 0 {
 				blockDeviceMapping.Ebs.Iops = blockDeviceMappingSpec.EBS.Iops
 			}
+			if volumeType == ec2.VolumeTypeGp3 && blockDeviceMappingSpec.EBS.ThroughputMib != nil && *blockDeviceMappingSpec.EBS.ThroughputMib > 0 {
+				blockDeviceMapping.Ebs.Throughput = blockDeviceMappingSpec.EBS.ThroughputMib
+			}
 		}
 
 		if aws.StringValue(blockDeviceMappingSpec.EBS.KMSKey.ID) != "" {