terraform: random_password

main.tf

variable "password" { default = "" }

resource "random_string" "string" {
  length = "12"

  count = "${var.password == "" ? 1 : 0 }"
}

locals {
  pwd = "${ element(concat(random_string.string.*.result, list("")), 0) != "" ? element(concat(random_string.string.*.result, list("")), 0) : var.password }"
}

output "var" {
 value = "${local.pwd}"
}