go-ethereum/tests/files/ansible/roles/ec2/tasks/setup.yml

---
- name: create default security group 
  ec2_group:
    name: "{{ security_group }}"
    region: "{{ region }}"
    description: "{{ project_description }}"
    rules:
        # ssh
      - proto: tcp
        from_port: 22
        to_port: 22
        cidr_ip: "{{ ip_access_range }}"
    rules_egress:
      - proto: all
        cidr_ip: "{{ ip_access_range }}"


- name: start ec2 instances
  ec2:  
    group: "{{ security_group }}"
    instance_type: "{{ instance_type }}" 
    image: "{{ image }}" 
    wait: true 
    region: "{{ region }}"
    key_name: "{{ keypair }}"
    instance_tags:
      Name: "{{ item }}"
      Role: client-tests
    count_tag: 
      Name: "{{ item }}"
    exact_count: 1
  with_sequence: start=0 end={{ total_no_instances - 1 }} format=testrunner-%1u