{
   "provider": {
      "aws": {
         "access_key": "XXX",
         "region": "us-east-1",
         "secret_key": "YYY"
      },
      "consul": {
         "address": "demo.consul.io:80",
         "datacenter": "nyc1",
         "scheme": "http"
      }
   },
   "resource": {
      "aws_instance": {
         "test": {
            "ami": "ami-de7ab6b6",
            "instance_type": "${consul_keys.input.var.size}"
         }
      },
      "consul_keys": {
         "input": {
            "key": {
               "default": "m1.small",
               "name": "size",
               "path": "tf_test/size"
            }
         },
         "test": {
            "key": [
               {
                  "delete": true,
                  "name": "id",
                  "path": "tf_test/id",
                  "value": "${aws_instance.test.id}"
               },
               {
                  "delete": true,
                  "name": "address",
                  "path": "tf_test/public_dns",
                  "value": "${aws_instance.test.public_dns}"
               }
            ]
         }
      }
   }
}