Overview
GCP configuration auditing is built around policy evaluation, resource inventory, and continuous monitoring. Config Validator evaluates infrastructure-as-code and live resources, while Cloud Asset Inventory provides a complete configuration snapshot across projects and organizations.
Key GCP Services for Configuration Auditing
- Config Validator – Evaluates resource configuration against policies.
- Cloud Asset Inventory – Provides full inventory and configuration history.
- Security Command Center – Aggregates findings and compliance status.
- Organization Policies – Enforces allowed and denied configurations.
- Forseti Security – Open-source auditing and policy enforcement.
Config Validator
Config Validator evaluates both Terraform and live GCP resources using policy-as-code. Policies are written in Rego (OPA) and can enforce security, compliance, and operational standards.
| Policy | Purpose |
|---|---|
| deny_public_storage | Ensures Cloud Storage buckets are not publicly accessible. |
| require_vpc_sc | Ensures sensitive services use VPC Service Controls. |
| enforce_iam_least_privilege | Detects overly permissive IAM roles. |
| require_kms_encryption | Ensures resources use CMEK encryption. |
Configuration Auditing Workflow in GCP
- Define Policies – Write Rego policies for Config Validator.
- Scan Infrastructure-as-Code – Validate Terraform before deployment.
- Scan Live Resources – Evaluate deployed resources continuously.
- Query Cloud Asset Inventory – Inspect configuration across projects.
- Review Security Command Center – Aggregate findings and compliance status.
- Automate Remediation – Use Cloud Functions or Forseti.
- Collect Evidence – Export reports for audits.
Policy Definition → IaC Validation → Live Resource Evaluation → Drift Detection → Remediation → Compliance Reporting
Common Use Cases
- Preventing public Cloud Storage buckets
- Enforcing CMEK encryption
- Auditing IAM roles for least privilege
- Verifying firewall rules and VPC configuration
- Ensuring secure Kubernetes cluster configuration
Evidence Collection in GCP
Evidence for audits can include:
- Cloud Asset Inventory exports
- Config Validator results
- Security Command Center findings
- IAM policy analysis reports
- Forseti audit logs
Frequently Asked Questions
How does configuration auditing work in GCP?
GCP uses Config Validator, Cloud Asset Inventory, Security Command Center, and Organization Policies to enforce configuration standards, detect drift, and provide compliance evidence.
Which GCP services support configuration auditing?
Key services include Config Validator, Cloud Asset Inventory, Security Command Center, Forseti, and Organization Policies.
Can Config Validator enforce policies automatically?
Yes. Config Validator can be paired with Cloud Functions or Forseti to remediate misconfigurations.