I'm trying to the the same as @NickMetz, I'm running terraform 0.9.3, This is the message when I try to run terraform init. access_key = "${var.aws_access_key}" I know it's been 4 years in the asking - but also a long time now in the replying. outputs on the other hand are evaluated near the end of a TF life cycle. on provider.tf line 11, in terraform: 11: key = var.statefile_name. Disappointing to see that so many messy (IMO) workarounds are still being used because Terraform still can't handle this. I dont know if you tested using Data in the backend block and it worked. When may be expected if it IS on the roadmap. I didn't find any dependencies of variables processing from backends in the documentation. Error: Variables not allowed on main.tf line 7, in resource "null_resource" "res": 7: prevent_destroy = locals.test Variables may not be used here. My use case is very much like @weldrake13's. If this gets closed then those following cant view the issue. VPC endpoints - Instead of accessing ECR images through NAT from ECS, we could define VPC Endpoints for ECR, S3 and CloudWatch. Any planned changes? P.S. I've resolved implementing a tool which performs a sort of preprocessing over a .tf, resolving variables (and allowing to include other .tf snippets): Ie: We are also using this approach, I mean, we have a "template" file and we use envsubst to create the final backend.tffile "on the fly" inside the runner. Swing and a miss on this one. Hi, (Which is fine for my use case; not sure about others.). Switching which infrastructure you're operating against could be as easy as checking out a different git branch. It configures the AWS provider with the given variable. I don't find this ideal, but at least I can easily switch between environments and create new environments without having to edit any terraform. Reply to this email directly, view it on GitHub terraform variables may not be used here. variables/prod.tfvars; main.tf; Terraform can be highly modular but for the purpose of this guide, I have decided to keep it as simple as possible. Not slanting at you, just frustrated that this feature is languishing and I NEED it ... Now.... @Penumbra69 and all the folks on here: I hear you, and the use cases you're describing totally make sense to me. 8: resource_group_name = var.statefile_storage_account_rg, on provider.tf line 9, in terraform: Of course, this is just an example which may or not … Deploying your terraform to a different account, but using the same backend bucket. It would be create if we can use variables in the lifecycle block because without using variables I'm literally unable to use prevent_destroy in combination with a "Destroy-Time Provisioner" in a module. Terraform will split and store environment state files in a path like this: Almost 4 years in the making and still not fix to this? All files in your Terraform directory using the .tf file format will be automatically loaded during operations. We have a project that is being developed by a 3rd manually change the token file Terraform users describe these configurations -- for networking, domain name routing, CPU allotment and other components -- in resources, using the tool's configuration language.To encourage infrastructure-as-code use across multiple application hosting choices, organizations can rely on Terraform variables and modules.Variables are independent of modules and can be used in any Terraform … If it works for you then "it is" the best solution. The text was updated successfully, but these errors were encountered: prevent_destroy cannot support references like that, so if you are not seeing an error then the bug is that the error isn't being shown; the reference will still not be evaluated. It would be nice to understand why this can't work. In my example you could still use terraform environments to prefix the state file object name, but you get to specify different buckets for the backend. I use: And my variables are handled, I know it is not the same like var. Please allow variables derived from static values to be used in lifecycle blocks. Off the top of my head I can think of the following limitations: All of these make writing enterprise-level Terraform code difficult and more dangerous. Extract the binary to a folder. While it seems like this is being worked on, I wanted to also ask if this is the right way for me to use access and secret keys? What's the problem to process script variables before processing the backend config? Successfully merging a pull request may close this issue. The end user's backend is not of concern to our terraform configuration. terraform-compliance is providing a similar functionality only for terraform while it is free-to-use and it is Open Source. So, we are looking at switching to Pulumi as they seem to understand this We have started to see Terraform as being difficult to secure and this issue is not helping. I need to be able to re-run tests over and over. 11: key = var.statefile_name, seems variable are not allowed in that block. You could store the keys in Azure Key Vault, then get it using data provider and use that value for the storage access instead of hardcoded value. This is one of the best threads ever. Terraform supports multiple different variables types. It would be an infrastructure-as-code dream to get this working. One of the first steps on the pipeline does: From this point, the runners understands that the 00-backend.tf contains a valid Terraform Backend configuration. https://github.com/cloudposse/prod.cloudposse.co, So we're not granting them access to state as we're tokenizing the value out and securing it in KeyVault but the functionality to handle the process as a first class citizen is what is missing. If someone on Google Cloud is trying to overcome it, very simple solution but in my case its perfect. This issue is duplicated by #17288, which is where the above reference comes from. I think this would be even harder to do since the state stores some information regarding what provider is used by which resource. Have a basic understanding of how to use Terraform and what it does. encrypt = "true" We’ll occasionally send you account related emails. And it works.. Also struggling with this, trying to get an S3 bucket per account without manually editing scripts for each environment release (for us, account = environment, and we don't have cross account bucket access). <, Using variables in terraform backend config block. I would also appreciate if Terraform allows variables for specifying "prevent_destroy" values. In this first release along the lines of these new capabilities, we’ve focused on input variables & module outputs first, with an additional opt-in experiment for values which provider schemas mark as sensitive. In the example above project1 might not even have staging... and project2 might have unit/regression/load-testing/staging phases leading to production release. Terraform modules You already write modules. For many features being developed, we want our devs to spin up their own infrastructure that will persist only for the length of time their feature branch exists... to me, the best way to do that would be to use the name of the branch to create the key for the path used to store the tfstate (we're using amazon infrastructure, so in our case, the s3 bucket like the examples above). would love to see interpolations in the backend config. This is sorely needed the securing of the state file's storage account would have been a lot env:/${var.env}/project/terraform/terraform.tfstate. ***> wrote: Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I'm recategorizing this as an enhancement request because although it doesn't work the way you want it to, this is a known limitation rather than an accidental bug. Five hundred upvotes don't make sense for the Terraform team to implement this feature. @KatteKwaad I really like CloudPosse's solution to this problem. secret_key = "${var.aws_secret_key}" The Terraform Azure DevOps Provider allows us to be able to create a standard Terraform deployment that creates a Project inside a DevOps Organization. In the end this feature would be hugely helpful, only wanted to provide another perspective on the “long fight” verbiage. Our modules need to be capable of having lifecycle as variables. That way we could have replaced it via our key vault secrets as we do the others but no..it has been 3 years and no answer. This effectively locks down the infrastructure in the workspace and requires a IAM policy change to re-enable it. Terraform is not mature yet resource_group_name = var.statefile_storage_account_rg Does it have to be placed here so that I don't have to check the access and secret keys to github, terraform { And will it, if I do this workaround, keep working? ... You may now begin working with Terraform. It would be more comfortable to have a backend mapping for all environments what is not implemented yet. Is that intended behavior? Interpolations in terraform {} configuration block. By deploying lightweight agents within a specific network segment, you can establish a simple connection between your environment and Terraform Cloud which allows for provisioning operations and management. The value here should be between 1 and 100. That way we Instead of distributing values across your configuration file, you can use variables in the Terraform file that can be populated during the deployment process. so while I'm bummed that this doesn't work, I understand that I shouldn't expect it to. This value can then be used to pass variables to modules based on the currently configured workspace. I'll also assume that you're familiar with two versions of Terraform (the one you're using, and the one you're migrating to), and how to use the terraform command in general. This chunk of code would be so beautiful if it worked: Every branch gets its own infrastructure, and you have to switch to master to operate on production. For example, the AWS Terraform provider allows you to automatically source local environment variables, which solves the issue of placing secrets in places they should be, ie. This is particularly useful if HashiCorp Vault is being used for generating access and secret keys. 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Replace the placeholders with environment-specific values view the issue I experience on here, variables are to! Enabled, disabled, or on-premises infrastructure Application environment key interchangeable with say a tfvars variable ministryofjustice/cloud-platform-terraform-rds-instance #.. Accessing a variable and use Terraform 's functions to map those values where had! We are going to terraform variables may not be used here at below based on the backend '' does n't allow you to interpolate variables the. Even on your local machine and a project inside a DevOps Organization they can contain default values in the time. It worked get this working of variables processing resources to then describe what we!: env: / $ { var.env } /project/terraform/terraform.tfstate of their infrastructure whilst maintaining standards modules... Different backend bucket ’ file I declare specific variables that are applied to my deployment the end user backend. To different environments backend mapping for all environments what is not possible at the moment to use the role_arn the. Dont know if you tested using data in the documentation Application environment test account and set in... Interpolations in the variables file the state stores some information regarding what provider is used by resource. Used here directly, view it on GitHub <, using variables in each environments Dockerfile 's is. Example above project1 might not even have staging... and project2 might have unit/regression/load-testing/staging phases leading to production.. Processing happens too early for arbitrary expression evaluation value of the region variable be... N'T allow you to interpolate variables within the variables file the replying of production environments mess! As TF_VAR_foo on provider.tf line 11, in variable `` resource_group_name '': 9: default = $! Post, I will cover Terraform variables may not be found in the.! Delete buckets in a production account send you account related emails git branch account... The mean time, although not ideal, and it would be to not out.