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Handling sensitive input variables in Terraform

Please see

• https://www.terraform.io/language/state/sensitive-data
• https://learn.hashicorp.com/tutorials/terraform/sensitive-variables

In a nutshell

1. declare sensitive variables in a variable.tf files, and reference them in other resources files
2. initialize the variables by using a .tfvars file or by environment variables of the form: TF_VARS_<var_name>

For instance, in variables.tf

variable "cvo_admin_password" {
  type      = string
  sensitive = true
}

and then

either

export TF_VAR_cvo_admin_password=my_password

or use a protected .tfvars file with

cvo_admin_password = "my_password"