The current implementation of Terraform import can only import resources into the state. It does not generate a configuration. Because of this, and prior to running terraform import, it is necessary to manually write a resource configuration block for the resource to which the imported object will be mapped.
First, add the resources to the configuration file:
resource "aws_instance" "example" {
# ...instance configuration...
}
Then run the following command:
$ terraform import aws_instance.example i-abcd1234