The rules are changing. Infrastructure is no longer a fixed asset. It is fluid, automated, and defined in code. In an IaaS environment, this demands a policy engine that speaks the same language as your infrastructure. Open Policy Agent (OPA) is that engine.
OPA is an open source, general-purpose policy framework. It integrates directly into IaaS systems, enabling fine-grained control over resources, deployments, and access. Instead of hardcoding authorization logic into each service, you write policies in Rego—a declarative, human-readable language. Policies become portable, auditable, and version-controlled alongside your code.
In IaaS, speed and control must coexist. OPA removes the need for manual checks by enforcing policies automatically at every point of the pipeline. It works with Kubernetes clusters, Terraform plans, Envoy proxies, and cloud APIs. Whether approving a new VM or preventing unsafe configurations, OPA makes policy enforcement immediate and consistent.
Rego policies evaluate structured data inputs from your infrastructure, returning decisions about what is allowed. You can use OPA to block insecure ports, require encryption, enforce naming conventions, or govern access based on identity and resource type. By decoupling policy from application logic, you gain the freedom to change rules without redeploying services.