aws_apprunner_service is unable to detect an existing apprunner service deployed by another terraform

[eduard93]

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Terraform CLI and Terraform AWS Provider Version

Terraform v1.0.0
on windows_amd64
+ provider registry.terraform.io/hashicorp/aws v3.44.0

Affected Resource(s)

• aws_apprunner_service

Terraform Configuration Files

provider "aws" {
  region = "us-east-2"
  profile = "ABC"
}

resource "aws_apprunner_service" "nginx" {
  service_name = "nginx"
  

  source_configuration {
    auto_deployments_enabled = false
    image_repository {
      image_configuration {
        port = "80"
      }
      image_identifier      = "public.ecr.aws/nginx/nginx:latest"
      image_repository_type = "ECR_PUBLIC"
    }
  }

  tags = {
    Name = "nginx-apprunner-service"
  }
}

Debug Output

• apply on server 1 - works
• apply again on server 1 - works
• apply on server 2 - fails

Expected Behavior

Terraform automatically detects that apprunner service with the same already exists and does not attempt to create it again.
Apply on server 2 is equal to apply again on server 1.

Actual Behavior

Terraform on server 2 does not see AppRunner Service deployed by Server 1 and tries to deploy it again. It fails with:

│ Error: error creating App Runner Service (nginx): InvalidRequestException: Service with the provided name already exists: nginx.
│
│   with aws_apprunner_service.nginx,
│   on main.tf line 6, in resource "aws_apprunner_service" "nginx":
│    6: resource "aws_apprunner_service" "nginx" {
│

Steps to Reproduce

1. terraform apply
2. Copy main.tf to another server (or folder) and go into that new server/folder
3. Run terraform apply there

Important Factoids

I want to deploy the same apprunner service from two different hosts, however a second host does not see an apprunner service deployed by a first host, tries to deploy it again and fails.

References

• aws_apprunner_service
• nginx on Public ECR Gallery

[ewbankkit]

Hi @eduard93 👋 Thank you for submitting this and this is an excellent use case of somewhere that Terraform and the Terraform AWS Provider could be much more helpful since in many cases they have enough information to return an error upfront during planning instead of unexpected behavior during apply.

I believe this falls under the provider-wide enhancement proposal of #14394, so by adding this link here it will add a reference to that issue so we can include it as a use case when thinking about the implementation details. Since this is likely something we will want more broadly across many resources, I'm going to close this particular issue to consolidate discussions, efforts, and prioritization on the topic while the reference would serve as the cue to make this specific resource one of the initial implementations. I would suggest those 👍 upvoting and subscribing here to do so on #14394 so we can appropriately gauge interest. Please feel free to provide feedback there.

[github-actions]

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