Your DevOps team would like to provision VMs in GCP via a CICD pipeline. They would like to integrate Vault to protect the credentials used by the tool. Which secrets engine would you recommend?

The Google Cloud Secrets Engine is purpose-built to integrate with Google Cloud Platform, allowing Vault to dynamically generate temporary service account keys or OAuth 2.0 tokens with precisely defined scopes and roles. This dynamic credential generation is ideal for CI/CD pipelines, as it eliminates the need to hardcode long-lived GCP credentials, significantly improving security by reducing the window of exposure for compromised access keys.

The Identity secrets engine is for managing Vault's internal identity system and aliases, not for generating credentials for external cloud providers like GCP.

While the Key/Value secrets engine (v2) can store static GCP credentials, it does not offer the dynamic, short-lived, and auto-rotation benefits that the dedicated Google Cloud Secrets Engine provides, which is crucial for CI/CD security.

The SSH secrets engine is used for generating one-time SSH credentials or signing SSH keys, which is unrelated to provisioning VMs in GCP.