Packer

packer validate example.json

packer build -var ‘aws_access_key=YOUR ACCESS KEY’ -var ‘aws_secret_key=YOUR SECRET KEY’ example.json

-only=amazon-ebs # build only something

Example json

example.json:

{
  "variables": {
    "aws_access_key": "",
    "aws_secret_key": "",
    "do_api_token": ""
  },
  "builders": [{
    "type": "amazon-ebs",
    "access_key": "{{user `aws_access_key`}}",
    "secret_key": "{{user `aws_secret_key`}}",
    "region": "us-east-1",
    "source_ami": "ami-fce3c696",
    "instance_type": "t2.micro",
    "ssh_username": "ubuntu",
    "ami_name": "packer-example {{timestamp}}"
  },{
    "type": "digitalocean",
    "api_token": "{{user `do_api_token`}}",
    "image": "ubuntu-14-04-x64",
    "region": "nyc3",
    "size": "512mb"
  }],
  "provisioners": [{
    "type": "shell",
    "inline": [
      "sleep 30",
      "sudo apt-get update",
      "sudo apt-get install -y redis-server"
    ]
  }],
  "post-processors": ["vagrant"]
}