terraform-development

Terraform Development Skill

Expert assistance for Terraform infrastructure as code, from basic configurations to enterprise-scale deployments.

Quick Start

For immediate tasks, use these common patterns:

Create a basic resource:

resource "google_compute_instance" "example" {
  name         = "example-instance"
  machine_type = var.machine_type
  zone         = var.zone
  
  boot_disk {
    initialize_params {
      image = var.image
    }
  }
  
  network_interface {
    network = "default"
  }
  
  labels = {
    environment = var.environment
  }
}

Define a variable with validation:

variable "environment" {
  type        = string
  description = "Deployment environment (dev, staging, prod)"
  
  validation {
    condition     = contains(["dev", "staging", "prod"], var.environment)
    error_message = "Environment must be dev, staging, or prod."
  }
}

Core Workflows

Creating New Infrastructure

1. Define resources - Start with required providers and resources
2. Add variables - Parameterize for reusability
3. Format and validate - Run terraform fmt and terraform validate
4. Plan and review - Execute terraform plan to preview changes
5. Apply changes - Run terraform apply after approval

Building Modules

1. Identify reusable patterns - Group related resources
2. Define clear interfaces - Document inputs and outputs
3. Implement validation - Add variable validations
4. Create examples - Provide usage examples in examples/
5. Document thoroughly - Maintain README with terraform-docs

When to Use Different Approaches

Single configuration vs Modules:

• Small projects (< 5 resources): Single configuration
• Reusable components: Resource modules
• Environment management: Infrastructure modules

State management:

• Local development: Local state (temporary only)
• Team collaboration: Remote state (S3, Terraform Cloud)
• Production: Remote state with locking and versioning