Terraform: dynamic blocks

A dynamic block (tf.io) (dynamic { }) acts much like a for expression is supported inside resource, data, provider, and provisioner blocks:

dynamic { }

Example

 dynamic "parameter" {
   for_each = var.parameters
   content {
     name         = parameter.value.name
     value        = parameter.value.value
     apply_method = lookup(parameter.value, "apply_method", null)
   }
 }

dynamic "versioning" {
   for_each = var.versioning ? [1] : []
   content {
     enabled = true
   }
  }

locals {
  dynamic     = "key_b"
  my_map_json = jsonencode({
    key_a           = "something"
    (local.dynamic) = "else"
  })
  # ...
}

Ref: https://github.com/hashicorp/terraform/issues/27037#issuecomment-734356738

Related

• Terraform blocks
• tm_dynamic

See also

• Terraform blocks: terraform, cloud, moved, dynamic, Terraform import block, required_providers
• for_each, each., Terraform: dynamic_blocks