Run instance with non-default EBS size
instance_id=$(aws ec2 run-instances \
--image-id YOUR_AMI \
--count 1 \
--instance-type t2.medium \
--block-device-mappings 'DeviceName=/dev/sda1,Ebs={VolumeSize=32}' \
--iam-instance-profile Arn=$iam_profile \
--key-name $key_name \
--subnet-id $subnet_id \
--security-group-ids $security_group \
--region $region \
--user-data file:///tmp/startup_image.sh \
--query 'Instances[0].InstanceId' \
--output text)