Terraform Best Practices for Multi-Cloud Infrastructure

Managing Terraform across multiple cloud providers at scale requires discipline. Here are the patterns we use across 100+ client environments.

Module Structure

Organize modules by service, not by provider: modules/ kubernetes/ # Works across EKS, AKS, GKE database/ # RDS, Cloud SQL, Azure Database networking/ # VPC, VNet, VPC-native GKE security/ # IAM, RBAC, Security Groups

State Management

Use remote state with locking — S3 + DynamoDB for AWS, Azure Blob Storage for Azure, GCS for GCP. Never use local state in team environments.

Workspace Strategy

Use Terraform workspaces for environment separation (dev/staging/prod) within a single configuration, with environment-specific variable files.

Provider Version Pinning

Always pin provider versions exactly:

terraform {
    required_providers {
      aws = { source = "hashicorp/aws", version = "= 5.50.0" }
    }
  }

Drift Detection

Run terraform plan in CI on a schedule (daily) to detect infrastructure drift before it becomes a problem.

InfraOpex IaC Services

We design and manage Terraform infrastructure across all major clouds with best practices built in from day one. Contact us for an IaC assessment.