Category Terraform Practice Lab

for_each: Creating Resources from Maps and Sets 🔧 Terraform Core ⭐ Beginner for_each each.key each.value toset() count vs for_each Scenario Your team stores configuration values in AWS Systems Manager Parameter Store. You need to create several parameters with different names…

count: Creating Multiple Resources from One Block 🔧 Terraform Core ⭐ Beginner count count.index Conditional Creation splat [*] Scenario Your team needs three identical S3 buckets for different data partitions — but you don’t want to write three separate resource…

Resource Dependencies: Implicit, Explicit and the Dependency Graph 🔧 Terraform Core ⭐ Beginner Implicit Dependencies depends_on terraform graph Execution Order Scenario You need to create an S3 bucket and an SQS queue, where the queue’s name includes the bucket name.…

Data Sources: Reading Existing Infrastructure 🔧 Terraform Core ⭐ Beginner data aws_caller_identity aws_region aws_vpc Filters Read-Only Scenario Your configuration needs to reference infrastructure that already exists — the current AWS account ID, the current region, the default VPC ID. You…

Locals: DRY Configuration with Computed Values 🔧 Terraform Core ⭐ Beginner locals local.* merge() DRY Principle Scenario You have a configuration where the same tag map, naming prefix, and computed values are repeated across a dozen resources. Every time you…

Outputs: Basic, Sensitive and Complex Types 🔧 Terraform Core ⭐ Beginner output sensitive description terraform output Complex Outputs Scenario You’ve deployed several resources and need to expose key information — bucket names, ARNs, connection strings — so other team members…

Variable Validation: Catching Bad Input at Plan Time 🔧 Terraform Core ⭐ Beginner validation can() regex() contains() length() Error Messages Scenario You are publishing a Terraform module for other teams to consume. Users keep passing invalid values — environment names…

Variable Precedence: Six Ways to Set a Variable 🔧 Terraform Core ⭐ Beginner terraform.tfvars .auto.tfvars -var -var-file TF_VAR_* Precedence Scenario Your team uses the same Terraform config for dev, staging, and prod. Different environments need different values — but the…

Complex Variable Types: Objects, Tuples and Optional Attributes 🔧 Terraform Core ⭐ Beginner object tuple optional() nullable Complex Types Scenario Your module accepts a bunch of related settings — bucket name, environment, whether to enable versioning, and a set of…

Variables: The Five Core Types 🔧 Terraform Core ⭐ Beginner variable string number bool list map type / default / description Scenario Your team has been hardcoding values directly into Terraform configs — region names, instance counts, feature flags —…