Infrastructure as Code (IaC) changes how we build and manage systems. Secrets and permissions are no longer scattered across servers or hidden in config files. With OpenID Connect (OIDC), IaC workflows can request short-lived credentials directly from your cloud provider, removing the need for long-lived access keys. This is faster, safer, and easier to maintain.
OIDC in IaC works by letting your CI/CD system exchange a signed token for cloud credentials. Tools like Terraform, Pulumi, and AWS CloudFormation integrate this flow natively. Instead of storing credentials in your repository or environment, you define trust relationships in your cloud provider. Your infrastructure code then authenticates dynamically on every run, using OIDC to verify identity and authorization.
For AWS, you create an IAM role with a trusted OIDC provider linked to your CI service. For Azure, you configure a federated identity credential. For GCP, you use a workload identity pool. This process eliminates manual key rotation and reduces blast radius in case of a breach. Audit logs clearly tie each action to the exact job that performed it.