vpc_name: '{{ resource_prefix }}-vpc'
vpc_seed: '{{ resource_prefix }}'
vpc_cidr: '10.{{ 256 | random(seed=vpc_seed) }}.0.0/16'
subnet_cidr: '10.{{ 256 | random(seed=vpc_seed) }}.32.0/24'
ec2_ami_name: 'amzn2-ami-hvm-2.*-x86_64-gp2'