Infrastructure as Code
Definition
Managing and provisioning cloud infrastructure using code files instead of manual configuration, streamlining deployment and consistency.
Use Cases
- Netflix: Standardizing and rapidly provisioning AWS infrastructure for microservices and continuous delivery — Netflix has publicly discussed using AWS CloudFormation to create repeatable stacks for services and environments, enabling teams to deploy consistent infrastructure through automated pipelines. (Faster environment creation, more consistent deployments, and reduced manual configuration errors through repeatable templates.)
- Amazon: Automating internal AWS resource provisioning with consistent security and compliance controls — Amazon created and open-sourced AWS CloudFormation Guard (cfn-guard) to validate CloudFormation templates against policy rules before deployment. (Improved governance by catching non-compliant infrastructure changes earlier, reducing risk and rework.)
- Google: Managing Kubernetes platform configuration and application delivery in a repeatable, version-controlled way — Google created and maintains Config Connector, which lets teams manage many Google Cloud resources using Kubernetes-style YAML and GitOps workflows (an IaC approach for GCP resources). (More consistent provisioning across environments and easier automation by treating infrastructure definitions like application code.)
Provider Equivalents
- AWS: AWS CloudFormation
- Azure: Azure Resource Manager (ARM) templates
- GCP: Google Cloud Deployment Manager
- OCI: OCI Resource Manager
Frequently Asked Questions
- What's the difference between Infrastructure as Code and configuration management?
- Infrastructure as Code (IaC) provisions and changes cloud resources like networks, load balancers, and databases using templates or code. Configuration management focuses on what happens inside servers or runtimes after they exist—installing packages, setting OS configs, and managing application settings. In practice, teams often use IaC to create the infrastructure and configuration management to configure what runs on it.
- When should I use Infrastructure as Code?
- Use IaC when you need repeatable environments (dev/test/prod), frequent changes, multiple regions/accounts, or strong auditability. It’s especially useful for teams using CI/CD, scaling quickly, or needing consistent security controls. If you only have a small, rarely changing setup, IaC may still help, but the biggest payoff comes with growth and ongoing change.
- How much does Infrastructure as Code cost?
- IaC is usually a tooling and process cost rather than a direct infrastructure cost. Many IaC tools are free or included with the cloud provider (for example, CloudFormation and ARM templates). You still pay for the cloud resources you create (compute, storage, networking). Additional costs can come from CI/CD runners, state storage (for some tools), policy scanning, and staff time to build and maintain templates and modules.
Category: cloud
Difficulty: advanced
Related Terms
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