Infrastructure

Importing an existing AWS instance into a Terraform module is straightforward, but the syntax trips people up because you need to specify the full module path. terraform import module.foo.aws_instance.bar i-abcd1234 The format is module.<module_name>.<resource_type>.<resource_name>, followed by the resource ID. In this case, foo is the module name, aws_instance is the resource type, bar is the resource name inside that module, and i-abcd1234 is the AWS instance ID. Once imported, Terraform will manage the instance and track any configuration drift going forward.

Terraform modules are usually at the root of a repository. Sometimes they’re nested in a subdirectory, and you need to point Terraform at the right one. Terraform handles this with a double-slash (//) in the source path. Everything after the // is treated as a subdirectory within the package. How It Works The syntax is straightforward: module "consul" { source = "hashicorp/consul/aws//modules/consul-cluster" } The hashicorp/consul/aws part is the module registry path. The //modules/consul-cluster tells Terraform to look inside that package for the actual module. ...