Create Dockerfile

[alexjplant]

👋 Hey everybody! I'm using LocalStack as part of a Docker Compose setup. As part of this effort I've whipped up a simple Dockerfile so that I can use terraform-local in the same fashion as Hashicorp's official Terraform image to apply Terraform after LocalStack spins up via depends_on and healthchecks. I pushed this to my own Dockerhub for the time being but it'd be great to have an upstream version. Happy to coordinate with you all on this and help in any way that I can; this probably needs a GH Action workflow and an official Dockerhub repo on top of what I have here.

[alexrashed]

Hi @alexjplant! This is pretty interesting! Could you please elaborate on how you are using this Docker image in your setup / workflow?

[alexjplant]

Sure! I have a Docker Compose file that spins up localstack as a service with a healthcheck that tests for its endpoints being available. I then have a service that depends on it (i.e. starts once it's available) that runs the terraform-local image that I built. The terraform-local service mounts a volume with the Terraform to be applied to localstack services and runs tflocal apply. Ordinarily I'd do this with the official terraform image but it lacks the Python script in this repo to build the localstack specific overrides. This arrangement makes it so that a fellow developer can git clone my project and simply do a docker compose up to get rolling; IMO this is much easier than jumping through pip and brew hoops to get things installed. It also has the added benefit of being as ephemeral as possible so that you don't have to worry about state in between runs.

localstack's value proposition is making AWS development tighter/easier and I think my use case takes this one step further :-). Let me know how I can help or if you have any other questions.