CODEWITHSUNDEEP
terraform-provider-aws
haju
haju

Reputation: 241

How to add dependency via arn in terraform?

I have terraform code , to create few aws resources. for example . i create a s3 bucket and create another resource based on or which depends on this s3 resource. I know terraform will figure out that this new object resource is dependent on the first s3 bucket resource, as i have passed this => aws_s3_bucket.s3.id , to the new resource. I'm not sure if this is a arn or bucket name or some intrinsic id that terraform maintains. but is it possible to add such dependency by passing in arn or something else?

so say , i had a bucket name that is already created somewhere else, and I can simply pass its arn in my example below , so instead of aws_s3_bucket.s3.id , i can pass bucket name , as var.bucket name will that work?

resource "aws_s3_bucket" "s3" {
  bucket = "s3-bucket-name"
  acl    = "private"
  ...
}

resource "aws_s3_bucket_object" "init" {
  bucket = aws_s3_bucket.s3.id
  key    = "bin.tar.gz"
  ....
}

I've tried passing this => aws_s3_bucket.s3.id, which works. but want to know if i can pass an arn

Upvotes: 3

Views: 171

Answers (1)

Anton
Anton

Reputation: 1966

  1. aws_s3_bucket.s3.id is actually the bucket name;
  2. aws_s3_bucket_object.init.bucket expects a bucket name, passing a bucket ARN will result in an error;
  3. aws_s3_bucket_object.init.bucket expects a string, it doesn't matter how you pass it there, so var.bucket will totally work as long as it's a valid string bucket name.

Upvotes: 1

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