Writing Terraform configurations

Use locals to specify explicit dependencies between resources
Helpful way to give a hint to Terraform that some resources should be deleted before even when there is no direct dependency in Terraform configurations.
​https://raw.githubusercontent.com/antonbabenko/terraform-best-practices/master/snippets/locals.tf​
Terraform 0.12 - Required vs Optional arguments
1.Required argument index_document must be set, if var.website is not an empty map.
2.Optional argument error_document can be omitted.
main.tf
variable "website" {
  type    = map(string)
  default = {}
}
​
resource "aws_s3_bucket" "this" {
  # omitted...
​
  dynamic "website" {
    for_each = length(keys(var.website)) == 0 ? [] : [var.website]
​
    content {
      index_document = website.value.index_document
      error_document = lookup(website.value, "error_document", null)
    }
  }
}
terraform.tfvars
website = {
  index_document = "index.html"
}

References

Workshop

Last modified 1mo ago