Learn Terraform by Examples
1.xTerraform is an infrastructure as code tool that lets you build, change, and version cloud and on-prem resources safely and efficiently.
These examples cover the core concepts of Terraform, from defining providers and resources to managing state and using modules.
Providers
Learn how to configure Terraform providers to interact with cloud APIs using this sample code. Covers essential best practices like version pinning, secure credential management, and using aliases for multi-region deployments.
Resources
Resources are the fundamental building blocks of Terraform infrastructure. This code example demonstrates creating an AWS EC2 instance with lifecycle management and explicit dependencies.
Data Sources
Data sources allow you to query existing infrastructure information. This sample code demonstrates fetching the latest Ubuntu AMI ID dynamically instead of hardcoding it.
Variables
Variables make your configurations reusable and flexible. This code example illustrates defining variables with types, descriptions, and defaults to parameterize your infrastructure.
Outputs
Outputs expose information from your infrastructure. This sample code demonstrates how to return values like IP addresses and handle sensitive data securely.
Modules
Modules allow you to encapsulate and reuse infrastructure configurations. This sample code demonstrates how to call a child module with versioning and input variables.
State Management
State management is crucial for Terraform. This sample code shows how to use `terraform_remote_state` to read outputs from a separate state file.
Input Validation
Input validation ensures your variables meet specific criteria. This code example demonstrates using custom validation rules with regex and list checks.
Provisioners
Provisioners execute scripts during resource creation. This sample code shows `local-exec` and `remote-exec`, but remember they should be a last resort.
Backends
Backends define where state is stored. This sample code configures an S3 remote backend with DynamoDB state locking for secure collaboration.