Terraform Complex Types and Dynamic Expressions on AWS

As Terraform configurations grow beyond simple string and number variables, teams need structured data types to model real infrastructure: lists of subnet CIDR blocks, maps of environment-specific settings, and objects representing complete service configurations. Terraform supports complex types including lists, maps, sets, and objects, along with iteration constructs like for_each and count that create multiple resource instances from a single block. Splat expressions and dynamic blocks further reduce repetition by extracting attributes across collections and generating nested blocks programmatically.

In this lab, you will define complex variable types including maps of objects and lists, use for_each and count to create multiple AWS resources from structured data, apply splat expressions to extract attributes from resource collections, and build dynamic blocks to generate repeated nested configurations on AWS.

Objectives

By completing this intermediate level lab, you will be able to:

• Define complex Terraform variable types including maps, lists, and objects
• Use for_each and count meta-arguments to create multiple resource instances
• Apply splat expressions to extract attributes from resource collections
• Build dynamic blocks to generate repeated nested resource configurations

Who is this lab for?

This lab is designed for:

• Cloud engineers building multi-environment AWS infrastructure with Terraform
• Platform teams who want to reduce configuration duplication through advanced expressions
• Terraform Associate candidates preparing for exam objectives on complex types and iteration