create-vm.yaml

#!/usr/bin/ansible-playbook
#
# Deploy a virtual machine in AWS EC2 default VPC
#
# - find default VPC in AWS region specified with environment variables
# - create a virtual machine in default subnet
# - adjust default security group to allow SSH access to default subnet
#
# Input parameters:
# - AWS region specified in environment variable (default: us-west-1)
# - ec2_ami: image ID
# - ec2_keypair: name of the keypair
# - ec2_keydata: public SSH key (optional, default: take from .ssh)
# - ec2_vm_tag: instance tag
#
---
- hosts: localhost
  vars_files:
  - parameters.yaml
  tasks:
  - name: Find default VPC
    ec2_vpc_net_info:
      filters:
        isDefault: "true"
    register: vpc_info

  - name: Find subnets in default VPC
    ec2_vpc_subnet_info:
      filters:
        vpc-id: "{{ vpc_info.vpcs[0].vpc_id }}"
    register: subnet_info

  - name: Add inbound access to default SG
    ec2_group:
      vpc_id: "{{ vpc_info.vpcs[0].vpc_id }}"
      name: default
      description: default VPC security group
      purge_rules: no
      purge_rules_egress: no
      rules:
        - proto: tcp
          ports: "{{ [ 22,ec2_open_ports|default([]) ]|flatten }}"
          cidr_ip: 0.0.0.0/0

  - name: create ec2 key pair
    ec2_key:
      name: "{{ ec2_keypair }}"
      key_material: "{{ ec2_keydata|default(lookup('file', '~/.ssh/id_rsa.pub')) }}"

  - name: Launch an EC2 instance
    ec2:
      image: "{{ ec2_ami }}"
      instance_type: t2.micro
      wait: true
      key_name: "test_key"
      vpc_subnet_id: "{{ subnet_info.subnets[0].subnet_id }}"
      exact_count: "{{ ec2_inst_count|default(1) }}"
      count_tag:
        Name: "{{ ec2_vm_tag }}"
      instance_tags:
        Name: "{{ ec2_vm_tag }}"