5.1. Cloud Governance and Azure Policy

💡 First Principle: Prevention is better than detection. Azure Policy ensures that resources are configured securely from the moment they're created—you can't misconfigure what the policy won't let you create.

Think of Azure Policy like building codes in construction. A building inspector doesn't just check completed buildings—they review plans before construction begins and can stop non-compliant work in progress. Similarly, Azure Policy can audit existing resources (find violations), deny creation (prevent violations), or automatically remediate (fix violations).

What breaks without governance? Configuration drift. Without policy enforcement, developers deploy resources with default settings, security teams discover issues weeks later, and remediation disrupts production. Worse, non-compliant resources multiply—one public storage account becomes ten, then a hundred. Policies shift security from reactive firefighting to proactive prevention.

Consider the compliance perspective: Regulations like PCI DSS and HIPAA require specific security controls. Without automated policy enforcement, proving compliance requires manual audits of every resource—a task that becomes impossible at scale. Azure Policy provides the evidence auditors need: a policy that was always enforced.