IaC (Infrastructure as Code)
Managing and provisioning infrastructure through machine-readable configuration files instead of manual processes.
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Definition
Infrastructure as Code (IaC) is the practice of managing and provisioning computing infrastructure through machine-readable definition files rather than manual configuration. Infrastructure is described in code, version-controlled, and applied automatically.
Popular IaC tools include Terraform (multi-cloud), Pulumi (code-first), AWS CDK, CloudFormation (AWS-specific), and Ansible. These tools enable teams to define their entire infrastructure stack — servers, databases, networking, DNS — in reproducible configuration files.
IaC brings software engineering practices to infrastructure: version control, code review, testing, and automated deployment. This makes infrastructure changes predictable, auditable, and reversible.
Why It Matters for Founders
IaC eliminates the "snowflake server" problem where infrastructure is manually configured and impossible to reproduce. With IaC, you can spin up identical environments for development, staging, and production, and recover from disasters by re-applying configurations.
For growing startups, IaC becomes important when infrastructure complexity increases. It is overkill for a single Vercel deployment but essential when managing multiple cloud services, databases, and environments.
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Real-World Example
A Terraform file defines an AWS VPC, RDS database, and ECS cluster. Running `terraform apply` provisions all resources in minutes. The entire infrastructure is version-controlled in Git.
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Frequently Asked Questions
What is Infrastructure as Code?+
What tools are used for IaC?+
When does a startup need IaC?+
What are the benefits of IaC?+
Terraform vs. Pulumi?+
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