The example launches ECS instance, disk, and attached the disk on ECS. the count parameter in variables.tf can let you create specify number ECS instances.

• Planning phase

    terraform plan 
    	var.availability_zones
    		Enter a value: {var.availability_zones}  /*cn-beijing-b*/
    	var.datacenter
    		Enter a value: {datacenter}
    	....
  

• Apply phase

    terraform apply 
        var.availability_zones
    		Enter a value: {var.availability_zones}  /*cn-beijing-b*/
    	var.datacenter
    		Enter a value: {datacenter}
    	....
  

• Destroy

    terraform destroy