How to do it...

- name: Create EBS volume and attach to Instance
  ec2_vol:
    aws_access_key: "{{ access_key }}"
    aws_secret_key: "{{ secret_key }}"
    region: "{{ aws_region }}"
    instance: "{{ item }}"
    volume_size: 10
    name: Public Instance 1
    device_name: /dev/xvdf
  with_items: "{{ ec2_public_instance.instance_ids }}"
  register: ec2_vol

This task will create an EBS volume with the tag name as Public Instance 1 and size 10 GB. Once the EBS volume is ready, it will be attached to the EC2 instance we provided with the device name /dev/xvdf.

We should note here that in this task, name and device_name are two different parameters with their own significance. A name is used as a tag; whereas device_name is unique for a one-to-one mapping between an EC2 instance and EBS volume used by AWS EC2.

Also, we have used the same registered variable for the EC2 instance ID that we used in Elastic IPs. If the variable had details of more than one instance, then this task would have created the same number of volumes and would have mapped it one-to-one.