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Terraform Modules and Best Practices - Infrastructure as Code | DevOps/SRE Interview Prep | Repovive

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DevOps/SRE Interview Prep16 sections · 139 units8h total

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Terraform Modules and Best Practices

Reusable infrastructure

Modules package reusable Terraform configurations.

Module structure:

modules/vpc/
  main.tf      # Resources
  variables.tf # Inputs
  outputs.tf   # Exposed values

Using modules:

module "vpc" {
  source = "./modules/vpc"
  cidr   = "10.0.0.0/16"
  name   = "production"
}

Best practices:

Pin module versions for reproducibility
Use workspaces or directories for environments
Keep state files small (split by service)
Run terraform fmt and terraform validate in CI