Terraform Providers Skill

Configure and manage Terraform providers for single and multi-cloud deployments.

Provider Requirements

terraform {
  required_version = ">= 1.5.0"

  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 5.0"
    }
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "~> 3.80"
    }
    google = {
      source  = "hashicorp/google"
      version = "~> 5.0"
    }
    kubernetes = {
      source  = "hashicorp/kubernetes"
      version = "~> 2.24"
    }
  }
}

Version Constraints

version = "5.0.0"           # Exact version
version = ">= 5.0"          # Minimum version
version = "~> 5.0"          # >= 5.0.0, < 6.0.0
version = ">= 5.0, < 6.0"   # Explicit range
version = "!= 5.1.0"        # Exclude version

Provider Configuration

AWS

provider "aws" {
  region = var.aws_region

  default_tags {
    tags = {
      Environment = var.environment
      ManagedBy   = "Terraform"
    }
  }

  assume_role {
    role_arn     = var.assume_role_arn
    session_name = "TerraformSession"
  }
}

Azure

provider "azurerm" {
  features {
    resource_group {
      prevent_deletion_if_contains_resources = true
    }
    key_vault {
      purge_soft_delete_on_destroy = false
    }
  }

  subscription_id = var.subscription_id
  tenant_id       = var.tenant_id
}

GCP

provider "google" {
  project = var.project_id
  region  = var.region
}

provider "google-beta" {
  project = var.project_id
  region  = var.region
}

Provider Aliases

Multi-Region

provider "aws" {
  alias  = "us_east_1"
  region = "us-east-1"
}

provider "aws" {
  alias  = "us_west_2"
  region = "us-west-2"
}

resource "aws_s3_bucket" "primary" {
  provider = aws.us_east_1
  bucket   = "${var.project}-primary"
}

resource "aws_s3_bucket" "replica" {
  provider = aws.us_west_2
  bucket   = "${var.project}-replica"
}

Multi-Account

provider "aws" {
  alias  = "prod"
  region = "us-east-1"

  assume_role {
    role_arn = "arn:aws:iam::PROD_ACCOUNT:role/TerraformRole"
  }
}

provider "aws" {
  alias  = "dev"
  region = "us-east-1"

  assume_role {
    role_arn = "arn:aws:iam::DEV_ACCOUNT:role/TerraformRole"
  }
}

Module Provider Inheritance

# Root module
provider "aws" {
  alias  = "west"
  region = "us-west-2"
}

module "vpc" {
  source = "./modules/vpc"

  providers = {
    aws = aws.west
  }

  cidr_block = "10.0.0.0/16"
}

Lock File

# .terraform.lock.hcl (auto-generated)
provider "registry.terraform.io/hashicorp/aws" {
  version     = "5.31.0"
  constraints = "~> 5.0"
  hashes = [
    "h1:xyz...",
    "zh:abc...",
  ]
}

# Update lock file
terraform init -upgrade

# Platform-specific locks
terraform providers lock \
  -platform=linux_amd64 \
  -platform=darwin_amd64 \
  -platform=darwin_arm64

Troubleshooting

Error	Cause	Solution
Provider not found	Not in required_providers	Add provider block
Version constraint	Incompatible version	Update constraint
Configuration missing	No provider block	Add configuration
Alias not found	Wrong alias reference	Check alias name

Debug Commands

# Show providers
terraform providers

# Show provider versions
terraform version

# Initialize providers
terraform init -upgrade

Usage

Skill("terraform-providers")

Related

• Agent: 01-terraform-fundamentals (SECONDARY_BOND)
• Skill: terraform-fundamentals (PRIMARY on same agent)