Nested dynamic blocks in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a dynamic block for 'ingress' inside a security group.

Terraform

resource "aws_security_group" "example" {
  name = "example"

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

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Aegress

Bingress

Crule

Ddynamic_block

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'egress' instead of 'ingress' for the dynamic block name.

Using a generic name like 'rule' which is not a valid block name here.

The dynamic block must be named after the block it generates, here 'ingress'.

2fill in blank

medium

Complete the code to start a nested dynamic block for 'cidr_blocks' inside the 'ingress' dynamic block.

Terraform

resource "aws_security_group" "example" {
  name = "example"

  dynamic "ingress" {
    for_each = var.ingress_rules
    content {
      from_port = ingress.value.from_port
      to_port   = ingress.value.to_port
      protocol  = ingress.value.protocol

      dynamic "[1]" {
        for_each = ingress.value.cidr_blocks
        content {
          cidr_block = cidr_blocks.value
        }
      }
    }
  }
}

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Acidr_block

Bcidr_blocks

Cblocks

Dcidrs

Attempts:

3 left

💡 Hint

Common Mistakes

Using plural 'cidr_blocks' instead of singular 'cidr_block'.

Using incorrect block names like 'blocks' or 'cidrs'.

The nested dynamic block must be named exactly as the block it generates, which is 'cidr_block'.

3fill in blank

hard

Fix the error in the nested dynamic block to correctly reference the current item in 'for_each'.

Terraform

resource "aws_security_group" "example" {
  name = "example"

  dynamic "ingress" {
    for_each = var.ingress_rules
    content {
      from_port = ingress.value.from_port
      to_port   = ingress.value.to_port
      protocol  = ingress.value.protocol

      dynamic "cidr_block" {
        for_each = ingress.value.cidr_blocks
        content {
          cidr_block = [1]
        }
      }
    }
  }
}

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Acidr_block.value

Bcidr_blocks.value

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'cidr_blocks.value' which is plural and incorrect.

Using undefined variable names.

The current item in the nested dynamic block is accessed as 'cidr_block.value'.

4fill in blank

hard

Fill both blanks to correctly define a nested dynamic block for 'ipv6_cidr_blocks' inside 'ingress'.

Terraform

resource "aws_security_group" "example" {
  name = "example"

  dynamic "ingress" {
    for_each = var.ingress_rules
    content {
      from_port = ingress.value.from_port
      to_port   = ingress.value.to_port
      protocol  = ingress.value.protocol

      dynamic "[1]" {
        for_each = ingress.value.ipv6_cidr_blocks
        content {
          cidr_block = [2].value
        }
      }
    }
  }
}

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Aipv6_cidr_block

Bipv6_cidr_blocks

Dipv6_blocks

Attempts:

3 left

💡 Hint

Common Mistakes

Using plural 'ipv6_cidr_blocks' as block name or variable.

Using incorrect variable names like 'ipv6_blocks'.

The nested dynamic block name and the variable to access current item must both be 'ipv6_cidr_block'.

5fill in blank

hard

Fill all three blanks to create nested dynamic blocks for 'ingress', 'cidr_block', and 'ipv6_cidr_block' inside a security group.

Terraform

resource "aws_security_group" "example" {
  name = "example"

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

      dynamic "[2]" {
        for_each = ingress.value.cidr_blocks
        content {
          cidr_block = [2].value
        }
      }

      dynamic "[3]" {
        for_each = ingress.value.ipv6_cidr_blocks
        content {
          cidr_block = [3].value
        }
      }
    }
  }
}

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Aingress

Bcidr_block

Cipv6_cidr_block

Degress

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'egress' instead of 'ingress' for the outer block.

Mixing up 'cidr_block' and 'ipv6_cidr_block' names.

The outer dynamic block is 'ingress'. The nested blocks are 'cidr_block' and 'ipv6_cidr_block' respectively.