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Cloud Run's built-in OIDC identity tokens simplify service-to-service auth, but audience validation, IAM condition limits, and local dev gaps require deliberate design. A worked example shows least-privilege bindings and the metadata server call pattern.
A decision guide for picking HashiCorp Vault's AppRole auth method for service‑to‑service authentication, with a comparison table, trade‑off analysis, and a step‑by‑step implementation you can validate.
Learn how AppRole lets services obtain short‑lived tokens for secrets, reducing risk of static credential leakage in dynamic environments.
vault