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Terraform Map Variable: A Complete Guide with Practical Examples
- Terraform map variable helps with managing your configuration using key-value pairs, allowing you to easily handle different environments or regions without repeating your code.
- A terraform map variable is a data structure in Terraform (and OpenTofu) that stores key-value pairs, where each key is linked to a specific value.
- The maps variable can store different types of values, which you can define using type labels.
- Some of the common map types include map(string), map(number), map(bool), map(list), map(map(string)), map(set), map(tuple([ ... ])), and map(object({ ... })).
- Best practices when using Terraform maps include using clear and descriptive names, using loops to avoid repetition, making use of functions to handle data, and using locals for complex logic.
- Using Terraform maps with env0 helps centralize and manage infrastructure configurations across different environments, and allows for reuse of map variables across different environments within the same project.
- Terraform maps are unordered, meaning the order in which you define keys and values doesn't matter, and they may not be retrieved in the same order.
- A list stores string keys and values in order, while a map stores key-value pairs with no specific order.
- In Terraform CLI flatten merges nested lists into a single, flat list.
- Terraform maps are a powerful tool for managing configuration and resources across multiple environments or regions, and using them effectively can help simplify infrastructure code and reduce duplication.
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