Quit condition on Terraform blueprint

问题

I want to have a terraform blueprint that quits given a certain condition at the top.

If the var.available is set to false, I want the blueprint to stop everything and throw an error. What is the syntax for this? I cannot find it in the doc files anywhere. Does this functionality even exist in terraform yet?

Note: this code is in a .tf blueprint file

My code:

available_ports = "${var.available ? 1 : quit_here}"

回答1:

There is a workaround to stop the Terraform script from executing based on a condition. All it needs is a null_resource:

resource "null_resource" "condition_checker" {
  count = "${var.variable == 1 ? 0 : 1}"
  "Insert your custom error message" = true
}

This workaround is explained by Jamie BitFlight here: Ability to raise an error #15469

There is limitation to this workaround. It does not work with -target enabled while running Terraform.

来源：https://stackoverflow.com/questions/48388902/quit-condition-on-terraform-blueprint