terraform-configuration

Organize Terraform configurations using separate directories or workspaces per environment, with shared modules for common resources. Use variables and locals to parameterize environment-specific settings like region, instance types, and tags, keeping provider and backend configurations distinct per environment.

Structure modules with clear input variables, outputs, and resource definitions in separate files. Group related resources, document variable types and defaults, and use consistent naming. This enables reuse across projects and environments while maintaining readable, maintainable infrastructure code.

Configure backends in a terraform block specifying the backend type (s3, azurerm, gcs) and access credentials. Backend state management centralizes infrastructure state, enables team collaboration, and prevents concurrent modifications. Initialize with terraform init after configuring the backend.

Yes, define multiple provider blocks with different credentials in your Terraform configuration. Specify which provider each resource uses with the provider argument. This enables multi-cloud deployments while managing all infrastructure from a single codebase.

Use variable type constraints (string, number, list, map, object) and validation blocks to enforce rules like allowed values, string patterns, or numeric ranges. This prevents invalid inputs at plan time, reduces runtime errors, and documents expected variable formats.

Use data sources to fetch information from providers without creating resources—query existing infrastructure, AMI IDs, or availability zones. Reference data source outputs in resource definitions, enabling dynamic configurations that adapt to your cloud environment without hardcoding values.