In this post, we’ll cover the typical Terraform project structure, and provide a gentle introduction to Terraform resources, variables, and outputs. As a part of this, we’ll also go through the starter commands: terraform init, apply, and destroy. ... For more example configuration and state files that reference code, and a summary of configuration variables, see Standard Backends: HTTP. This technique is built-in into Terraform itself and is thus independent from any specific provider. Terraform supports storing state in Terraform Cloud, HashiCorp Consul, Amazon S3, Azure Blob Storage, Google Cloud Storage, Alibaba Cloud OSS, and more. How to Create a Google Storage Bucket for Remote Backend using Terraform. Then, you’ll create a project with a simple structure using the more common features of Terraform: variables, locals, data sources, and provisioners. variables amazon-s3 runtime terraform ${var.aws_region} and ${var.stack_name}) Actual Behavior. variable "variable_name" {} terraform apply -var variable_name="value" Terraform will interpolate all variables provided in the backend configuration (i.e. Terraform treats ${var.stack_name} and ${var.aws_region} as literal strings causing a terraform plan/apply to fail. Terraform Version Terraform v0.11.3 + provider.aws v1.8.0 Use case. 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. 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. Remote state is a feature of backends , which you can activate in your configuration's root module. Variables can be predetermined in a file or included in the command-line options. Create an environment variable named ARM_ACCESS_KEY with the value of the Azure Storage access key. 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. We recommend that you use an environment variable for the access_key value. 2. Using an environment variable prevents the key from being written to disk. The region in the URL can be something other than the Phoenix region. 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.. Terraform can deduct the type of the variable from the default or input value. Actual Behavior Terraform tries to load the variable as it was a file. Each of these values can be specified in the Terraform configuration file or on the command line. For now I am using local (file) state. Doing so requires that you configure a backend using one of the Terraform backend types. 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. 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 … 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? Variable prevents the key from being written to disk a name while type. 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