Writing Efficient Terraform Code
While Terraform is a declarative language, there are times when you need to use functional constructs to write efficient code. In this chapter, we cover some of these constructs and provide some tips to write Terraform code efficiently. In particular, we introduce dynamic blocks and conditional expressions to make the code more flexible. Then, we show how to use Terraform’s built-in functions and information from resources created outside of Terraform. We conclude the chapter by discussing how to expose Terraform information using output values and provide some tricks for writing Terraform code efficiently. Thus, by the end of this chapter, you will be able to write more efficient Terraform code and do so more efficiently.
In this chapter, we cover the following main topics:
- Terraform types and values
- Using Terraform expressions
- Terraform functions
- Referencing existing data using data sources
- Using output values ...
