Solution scenario
Terraform module library with policy as code
Infrastructure code copied between repositories, with each copy diverging in naming, tagging and security defaults.
This is an illustrative reference design describing how Protogenies approaches this class of problem. It is not a named client engagement, and it contains no performance claims.
Challenge
What has to be solved
Drift between environments produces incidents after release, and standards exist only as documentation.
Technical constraints
- Existing state files must be preserved
- Teams keep ownership of their own environments
- Changes must be reviewable in pull requests
Approach
A versioned module library encoding the approved pattern, combined with policy checks that evaluate plans in CI before apply.
Implementation
- 01Module inventory covering the resources teams actually provision
- 02Naming, tagging, encryption and logging defaults built into modules
- 03Policy-as-code rules evaluated against plan output
- 04Drift detection on a schedule with reconciliation guidance
- 05Examples, documentation and a module contribution process
Technology stack
TerraformOPA / ConftestGitHub ActionsAWSAzure
Expected qualitative outcomes
- Compliant infrastructure is the default output rather than an exception
- Environment differences become visible in review instead of in production
- One upgrade path when a standard changes
- Infrastructure changes carry the same review record as application code
Things to weigh up
- Module versioning discipline matters more than module count
- Policy rules need owners, or exceptions accumulate
Talk to the engineers who would do the work
Bring your current architecture, constraints and the problem you are trying to solve. We will tell you what we would change first, what it depends on, and where we would start.