Terraform Remote State quick explanation

terraform-remotestate.md

Cross Referencing resources

To reference the resources created by this stack in other stacks you need to define a data resource pointing to the S3 bucket and key defined in `remote-state.tf.

Your data definition should look something like this:

data "terraform_remote_state" "vpc" {
    backend = "s3"
    config {
        bucket = "terraform-state.example.com"
        key = "eu-west-1/vpc-1"
        region = "eu-west-1"
    }
}

In your code, if you wanted (for example) to reference the vpc_id created by this stack you would do something like this:

vpc_id = "${data.terraform_remote_state.vpc.vpc_id}"

• The .vpc. section in the variable name must match the name of the data resource you define.
• The .vpc_id is the name of the variable from this (the source stack). Must be one of those listed in outputs.tf.