Terraform variable validation

Question

How to use loop or something else to make it efficient way not using regex.

variable "instance_auto_renew_period" {
  description = "Instance auto-renewal period (in months). Set it to 0 if you want to disable auto renew of DB instance."
  default     = 0
  type        = string
  validation {
    condition     = contains(["0", 1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12"], var.instance_auto_renew_period)
    error_message = "Must be an valid instance_auto_renew_period."
  } 
}

What do you want to achieve? Do you have examples of valid input and invalid ones? — Marcin
– Marcin, Commented Mar 16, 2021 at 3:57
valid input is between [0-12] if any value more than 12 is not acceptable want to achieve same thing as posted in above snippet, but with loop or something else. — sameer shaikh
– sameer shaikh, Commented Mar 16, 2021 at 4:03

Marcin · Accepted Answer · 2021-03-16 04:14:47Z

1

I think the easiest way to achieve that is as follows:

variable "instance_auto_renew_period" {
  description = "Instance auto-renewal period (in months). Set it to 0 if you want to disable auto renew of DB instance."
  default     = 0
  type        = number
  validation {
    condition     = var.instance_auto_renew_period <= 12 && var.instance_auto_renew_period >= 0
    error_message = "Must be an valid instance_auto_renew_period."
  } 
}

answered Mar 16, 2021 at 4:14

Marcin

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