atlantis VS terratest

Atlantis is a pull request automation tool that works well with plain Terraform right away. But what if we're already using Terramate to generate Terraform code?

Atlantis automates reviewing and deploying Terraform via pull requests, streamlining collaboration and ensuring consistency across Terraform deployments.

For example, Atlantisgo for Terraform, Zapier’s Kubechecks for Argo CD, Quizlet’s GitHub action all do something similar to this. But a generic, extensible tool for IaC providers doesn’t seem to exist. Additionally, many of them require exposing your Kubernetes cluster or other infrastructure to third-party access, webhooks, etc.

Our first attempt was to introduce other engineering teams to Terraform - the Platform team was already using it extensively with Terragrunt, and using Atlantis to automate plan and apply operations in a Git flow to ensure infrastructure was consistent. We'd written modules, with documentation, and an engineer would simply need to raise a PR to use the module and provide the right values, and Atlantis (once the PR was approved by Platform) would go ahead and set it up for them.

Alternatively, you can look at solutions like Atlantis or spacelift.

Atlantis: https://www.runatlantis.io/

Looking at the commits at https://github.com/runatlantis/atlantis, it looks like 1.6.5. Am I right?

We use Atlantis [0] for CI/CD automation of Terraform pull requests to a centralized repository. It's pretty good too, especially for a self-hosted solution. I can't see how Terraform Cloud's costs would be justifiable for us without a custom contract.

[0] https://www.runatlantis.io/

Terratest is a Go library that provides tools and patterns for testing infrastructure, with first-class support for Terraform, Packer, Docker, Kubernetes, and more. It's used to write automated tests for your infrastructure code.

I think I found it. This is the one right? https://github.com/gruntwork-io/terratest/

What it does in parallel is basically init/plan/show using terratest on every subdirectory on your repository tree or provided paths. The output is either a JSON summary or a custom made Junit XML test file you can ingest into your tests reader. It took it around 8 minutes to map the entirety of our bloated repository.

You could deploy to a separate account (usually dev first), you can use terratest, you could try something like LocalStack. I dare say there’s other methods.

Was wondering if anyone has tried https://github.com/gruntwork-io/terratest to test their infrastructure. I like it because I can write golang tests! Thats a big plus for me.

Once there is a CI pipeline for delivering infra changes you can add static code analysis tools (checkov) and even start testing changes (terratest)

https://github.com/gruntwork-io/terratest/blob/master/test/azure/terraform_azure_example_test.go https://github.com/gruntwork-io/terratest/blob/master/examples/terraform-backend-example/main.tf

Another plus is to add tests into your workflow, just by adding a run step with terratest

Terratest: Framework de testes para Terraform, os testes devem ser escritos em Golang.