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03-variables.md

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Lab: Variables

Help for the VSCode editor.

  1. Which of the following is not a valid variable type?

    Refer: https://developer.hashicorp.com/terraform/language/expressions/types

    item

  2. Which one of the below is not a valid data type in terraform?

    Referring to the same documentation...

    array

    In terraform, we refer to array-like types as list

  3. Navigate to the directory /root/terraform-projects/variables. Which type does the variable called number belong to?
    1. In the Explorer pane, navigate the the indicated file and click to open.
    2. find variable "number" and examine the type attribute

    bool

  4. How would you fetch the value of the key called slow from the variable called hard_drive in a terraform configuration?

    Examine the variables.tf file. See the variable "hard_drive". This is a map type with strings as keys. It is also initialized with a default value which has the two key-value pairs slow and fast.

    Know that when referencing a variable, we must use the prefix var., and when accessing a key in a map we use [] with the key name within.

    var.hard_drive["slow"]

  5. What is the index of the element called Female in the variable called gender?

    Examine the variable "gender" in the file. It is a list of strings with a default value.

    Know that when indexing a list, the first element is at index zero.

    1

  6. What is the type of variable called users?

    This is the same as Q3. Examine the type attribute of the users variable.

    set(string)

  7. However, this variable has been defined incorrectly! Identify the mistake.

    Know that the definition of a set is that its values must be unique. Examine the values closely with this in mind.

    duplicate elements

  8. Information only.

  9. What is the value for the argument called content used in the resource block for the resource jedi?

    Look in main.tf. Identify the value of the attribute

    phanius

  10. Now, let's update this resource and add variables instead. Use the default value declared in the variable called jedi.

    1. Inspect variables.tf. Find the jedi variable.

    2. This variable, like the hard_drive variable is a map keyed with strings. Therefore we need to make expressions like the answer to Q4.

    3. Modify the jedi resource accordingly

      Reveal 
      resource "local_file" "jedi" {
    filename = var.jedi["filename"]
    content = var.jedi["content"]
}

      Ingnore it if you get a red underline in the file. Possible bug in the VSCode terraform plugin.

    4. Deploy the resource

      cd /root/terraform-projects/variables
terraform init
terraform plan
terraform apply