config.hcl

scale "bump" {
    name = "hello"
    type = "rabbitmq"
}

scale "derp" {
    name = "world"
    type = "derp"
}

main.go

package main

import (
	"io/ioutil"

	log "github.com/Sirupsen/logrus"
	"github.com/hashicorp/hcl"
)

// Scale struct
type Scale struct {
	Name string
	Type string
}

// Config struct
type Config struct {
	Scales []Scale `hcl:"scale"`
}

func main() {
	var out Config
	config, err := ioutil.ReadFile("config.hcl")
	if err != nil {
		log.Errorf("Failed to read file: %s", err)
		return
	}

	hclErr := hcl.Decode(&out, string(config))
	if hclErr != nil {
		log.Errorf("HCL Error: %s", hclErr)
		return
	}

	log.Infof("Number of rules: %d", len(out.Scales))
	for index, scale := range out.Scales {
		log.Infof("[%d]  name: %s ; type : %s ", index, scale.Name, scale.Type)
	}
}