Dynamic block syntax in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a dynamic block for security group rules.

Terraform

dynamic "ingress" {
  for_each = var.rules
  content {
    from_port   = ingress.value.from_port
    to_port     = ingress.value.to_port
    protocol    = ingress.value.protocol
    cidr_blocks = ingress.value.[1]
  }
}

Drag options to blanks, or click blank then click option'

Acidr_blocks

Bports

Caddresses

Dranges

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ports' or 'addresses' instead of 'cidr_blocks' causes errors.

Confusing 'cidr_blocks' with 'protocol'.

The cidr_blocks attribute specifies the IP ranges for the ingress rule. It must match the variable's key.

2fill in blank

medium

Complete the code to iterate over a list of tags using dynamic blocks.

Terraform

resource "aws_instance" "example" {
  ami           = var.ami
  instance_type = var.instance_type

  dynamic "tag" {
    for_each = [1]
    content {
      key   = tag.key
      value = tag.value
    }
  }
}

Drag options to blanks, or click blank then click option'

Avar.security_groups

Bvar.instances

Cvar.subnets

Dvar.tags

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated variables like 'instances' or 'subnets' causes errors.

Not using a variable at all in the for_each expression.

The dynamic block iterates over var.tags to create tags for the instance.

3fill in blank

hard

Fix the error in the dynamic block to correctly reference the iterator variable.

Terraform

dynamic "egress" {
  for_each = var.egress_rules
  content {
    from_port   = [1].from_port
    to_port     = egress.value.to_port
    protocol    = egress.value.protocol
    cidr_blocks = egress.value.cidr_blocks
  }
}

Drag options to blanks, or click blank then click option'

Aegress.key

Begress.value

Cegress

Degress_rules

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'egress' without '.value' causes attribute errors.

Using 'egress.key' instead of 'egress.value'.

The iterator variable is egress, and its value must be accessed with egress.value.

4fill in blank

hard

Fill both blanks to create a dynamic block for multiple ingress rules with correct iteration and attribute access.

Terraform

dynamic "ingress" {
  for_each = [1]
  content {
    from_port   = ingress.[2].from_port
    to_port     = ingress.value.to_port
    protocol    = ingress.value.protocol
    cidr_blocks = ingress.value.cidr_blocks
  }
}

Drag options to blanks, or click blank then click option'

Avar.ingress_rules

Bvalue

Ckey

Dvar.egress_rules

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong variable for for_each.

Using '.key' instead of '.value' to access attributes.

The dynamic block iterates over var.ingress_rules, and the current item is accessed with ingress.value.

5fill in blank

hard

Fill all three blanks to define a dynamic block for tags with correct iteration, key, and value references.

Terraform

dynamic "tag" {
  for_each = [1]
  content {
    key   = tag.[2]
    value = tag.[3]
  }
}

Drag options to blanks, or click blank then click option'

Avar.tags

Bkey

Cvalue

Dtags

Attempts:

3 left

💡 Hint

Common Mistakes

Using an incorrect variable for for_each.

Mixing up 'key' and 'value' attribute names.

The dynamic block iterates over var.tags, and inside the block, tag.key and tag.value access the tag's key and value.