terraform-aws-ecs-atlantis VS terragrunt-atlantis-config

Spin up an EKS cluster with VPC, subnets, etc. using only terraform code. Spin up a tool like Atlantis to be able to deploy from GitHub. Should take a week or two and get you going.

I've also made the switch from managing a few thousand Terraform modules to handling most app-code things in Pulumi and have run into some of these limitations.

With Terraform + Terragrunt + Atlantis, we created https://github.com/transcend-io/terragrunt-atlantis-config and had an extremely robust and easy to use flow for updating all infra code.

We've since moved to an approach where more of our infra/security things are managed in Terraform (like Guardduty, SSO, Github repo settings, etc.) maintained by more devops folks, and our app code is mostly in Pulumi (lambdas, Fargate, CloudFront/CloudFlare CDNs, etc.). To accomplish this without something like Atlantis, we moved the app code infra deployments from being deployed continuously pre-merge via Atlantis to being deployed via `pulumi up` calls in our normal CI flows, so like right next to where we build the docker images and restart ECS services, as an example.

Overall I actually really love this flow. It is so, so much easier to create multi-regional infra in Pulumi with a quick for loop, and it's also much easier to do things like run esbuild over our code in typescript, and then bundle the output of that call and send it up to a Lambda function all from pulumi/typescript without needing separate build steps or to do things like using terragrunt pre-hooks or Docker build steps inside terraform provisioners, which I always found slow and clunky.

I would agree that Pulumi's plans are a disappointment though, exactly as you said.

Overall I've been happy with the change, and we've seen some improvements I think in the velocity that developers can launch services that meet our requirements.

I recommend atlantis with terragrunt-atlantis-config.

I know this is a bit too specific, it is about the ` terragrunt-atlantis-config tool, but in case anyone has come across this issue any help would be highly appreciated.

I've managed to make it work but it was really hard for me to set it up correctly. My biggest issue was that I didn't want every Terragrunt module to be run when I've opened a PR. Have a look at this project which helped me to run only the modules witch changes in every PR. Note that, I last used Atlantis a year ago so I don't know if they recently made changes for better Terragrunt support.

The most recent release of Atlantis includes a new feature that allows you to register a hook before atlantis reads its atlantis.yaml config. You can now dynamically build your atlantis.yaml file in the atlantis itself. I think using something like terragrunt-atlantis-config can make working with terragrunt easier.