Importing Existing Resources into Terraform 🔧 Terraform Core ⭐ Intermediate import block terraform import -generate-config-out Scenario Your team created S3 buckets via the AWS console before adopting Terraform. Now you want to bring them under Terraform management without deleting and…

terraform state Commands: Inspecting and Manipulating State 🔧 Terraform Core ⭐ Intermediate state list state show state mv state rm state pull Scenario You need to rename a resource in your config without destroying and recreating it. You also want…

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…