Use Kubernetes persistent cache

When kubernetes is configured for the persistent cache type, Vault Proxy will optimize the persistent cache specifically for Kubernetes. This type of persistent cache requires a Kubernetes service account token. The service account token is used during encryption and decryption of the persistent cache as an additional integrity check.

The Vault Proxy persistent cache file in Kubernetes should only be used for handing off Vault tokens and leases between initialization and sidecar Vault Proxy containers. This cache file should be shared using a memory volume between the Vault Proxy containers.

Configuration

• service_account_token_file (string: optional) - When type is set to kubernetes, this configures the path on disk where the Kubernetes service account token can be found. Defaults to /var/run/secrets/kubernetes.io/serviceaccount/token.