Terraform can deduct the type of the variable from the default or input value. terraform { backend "s3" { bucket = "some-bucket" key = "path/to/key" region = "some-aws-region" }} How to pass the bucket and region values to this from a variables.tf file? As a part of this, we’ll also go through the starter commands: terraform init, apply, and destroy. Remote state is a feature of backends , which you can activate in your configuration's root module. In the end, your project will deploy an Ubuntu 18.04 server (Droplet) on DigitalOcean, install an Apache web server, and point your domain to … Doing so requires that you configure a backend using one of the Terraform backend types. The region in the URL can be something other than the Phoenix region. Then, you’ll create a project with a simple structure using the more common features of Terraform: variables, locals, data sources, and provisioners. Note, we’ll use a local backend … As such, the simplest variable is just a name while the type and value are selected based on the input. Create an environment variable named ARM_ACCESS_KEY with the value of the Azure Storage access key. How to Create a Google Storage Bucket for Remote Backend using Terraform. Each of these values can be specified in the Terraform configuration file or on the command line. Variables can be predetermined in a file or included in the command-line options. We recommend that you use an environment variable for the access_key value. Terraform will interpolate all variables provided in the backend configuration (i.e. Following is an example Terraform configuration. Terraform should use the variable specified in the ìnit`command and use region = 'eu-west-1' for the backend. Terraform Version Terraform v0.11.3 + provider.aws v1.8.0 Use case. Personally, I create these resources from the Terraform itself with my backend repository which can be found here.When applying these Terraform configuration it creates a DynamoDB table with the name “tf-remote-state-lock” along with the “LockID” to maintain a state lock while there is an ongoing configuration “apply” to the environment. ${var.aws_region} and ${var.stack_name}) Actual Behavior. Actual Behavior Terraform tries to load the variable as it was a file. In this post, we’ll cover the typical Terraform project structure, and provide a gentle introduction to Terraform resources, variables, and outputs. Hi all, Terraform cannot support arbitrary expressions in the backend block because the configuration inside it must be processed to even retrieve the latest state snapshot, and the latest state snapshot is required in order to evaluate expressions.. This technique is built-in into Terraform itself and is thus independent from any specific provider. ... For more example configuration and state files that reference code, and a summary of configuration variables, see Standard Backends: HTTP. variable "variable_name" {} terraform apply -var variable_name="value" 2. For your specific use case this would mean, that you can set the Terraform variable access_key by setting the **environment* variable TF_VAR_access_key. For now I am using local (file) state. Using an environment variable prevents the key from being written to disk. Terraform supports storing state in Terraform Cloud, HashiCorp Consul, Amazon S3, Azure Blob Storage, Google Cloud Storage, Alibaba Cloud OSS, and more. Terraform treats ${var.stack_name} and ${var.aws_region} as literal strings causing a terraform plan/apply to fail. variables amazon-s3 runtime terraform } and $ { var.aws_region } as literal strings causing a Terraform plan/apply to fail Terraform deduct! Actual Behavior } ) Actual Behavior named ARM_ACCESS_KEY with the value of Azure! 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