Unable to setup cron_schedule variable in ES auto_tune

[vinayadahal]

Describe the Bug

I am unable to setup auto_tune for ES using the provided documentation. Whenever I run terraform plan I get following error.

An input variable with the name "auto_tune_cron_schedule" has not been declared. This variable can be declared with a variable "auto_tune_cron_schedule" {} block.

Upon checking the main.tf file on this repo, it was referring to auto_tune_cron_schedule variable and when I checked variables.tf, I didn't find that variable. I believe someone should check the line 182 on main.tf.

Currently, it is as follows:

cron_expression_for_recurrence = var.auto_tune_cron_schedule

Expected Behavior

I think should be as follows (if I am not mistaken)

cron_expression_for_recurrence = var.auto_tune.cron_schedule

Also, What is the proper way to define the cron expression for auto_tune. I checked the documentation but didn't find any examples for it.

Steps to Reproduce

  auto_tune = {
    enabled             = true
    rollback_on_disable = "DEFAULT_ROLLBACK"
    starting_time       = "2023-03-03T02:45:00"
    cron_schedule       = "45 02 * * ? *"
    duration            = 2
  }

Screenshots

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Environment

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Additional Context

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