Incorrect Behavior: terraform_remote_state potentially missing arguments

[arundhingra]

Terraform Version

Terraform v1.10.0
on darwin_arm64
+ provider registry.terraform.io/hashicorp/aws v5.79.0

Terraform Configuration Files

data "terraform_remote_state" "remote_state" {
  backend = "s3"

  config = {
    bucket   = "state_bucket"
    encrypt  = true
    key      = "terraform.tfstate"
    region   = "us-east-1"
  }

  assume_role = {
    role_arn = "arn:aws:iam::0000000000:role/state-role"
  }
}

Debug Output

n/a

Expected Behavior

Terraform should apply successfully

Actual Behavior

Terraform did not apply successfully

Steps to Reproduce

1. terraform init
2. terraform apply

Additional Context

The role_arn field was deprecated from the S3 backend config block, and the functionality removed in terraform version 1.10. It is recommended to instead use the assume_role block (docs).

However, the assume_role block is not supported for the terraform_remote_state data source (docs).

References

https://github.com/hashicorp/terraform/pull/35721

[jbardin]

Hi @arundhingra,

The terraform_remote_state data source only has a config attribute for configuration, because that object contains the entire configuration for the backend being used. Does it work if you add assume_role into the config object?