Infrastructure as code (IaC) is the practice of defining servers, networks, and cloud services in version-controlled files instead of configuring them by hand. Tools read those files and create or update the environment to match.
For SOC 2, IaC is useful because infrastructure changes go through the same review and history as application code. That can make it easier to show who changed what, when, and with whose approval.
In simple terms, IaC answers:
- How is our infrastructure configured, and can we reproduce it?
- Who changed it, and was the change reviewed?
- How do we detect drift from the intended setup?
Why Infrastructure as Code Matters
- Changes live in version control, which creates a built-in history
- Reviews happen before changes are applied, supporting change management
- Environments can be rebuilt consistently, which supports disaster recovery
- Configuration is visible and diffable, which helps spot unintended differences
IaC vs Manual Configuration
| Aspect | Manual configuration | Infrastructure as code |
|---|---|---|
| Record of changes | Console logs, if retained | Commit history and pull requests |
| Review | Often informal | Can use pull request approval |
| Repeatability | Depends on memory and notes | Defined in files |
| Drift | Harder to see | Can be compared against code |
IaC does not remove risk. Someone can still change resources by hand outside the code, so teams usually limit console access and monitor for drift.
Example Evidence
| Activity | Example evidence |
|---|---|
| Definition | Repository containing infrastructure files |
| Review | Pull request approvals on infrastructure changes |
| Protection | Branch protection settings on the infrastructure repository |
| Apply | Pipeline or deploy logs showing who applied the change and when |
| Drift | Reports or alerts comparing live resources to code |
How Auditors Typically Test It
Auditors often ask for a population of infrastructure changes for the audit period, pick an audit sample, and trace each to a review and an apply record. Gaps can be recorded as a control deviation.
Common Mistakes
- Allowing manual console changes with no record
- Applying changes from a laptop with no review
- Leaving the infrastructure repository without branch protection
- Not retaining pipeline logs for the full audit period
- Storing secrets in plain text inside the code
How AuditFlo.co Helps
AuditFlo.co helps teams retain audit-period history for change records when code and tickets live in connected systems such as GitHub. That can make it easier to show review history for infrastructure repositories. AuditFlo.co does not apply infrastructure changes, does not issue SOC 2 reports, does not certify compliance, and does not replace auditors.
To see the workflow for your stack, request a demo.
Key Takeaway
Infrastructure as code turns infrastructure changes into reviewable, traceable records. Protect the repository, retain apply logs, and control manual changes so the history is complete.