Monitor Vault for updated values used for configuration

[findkim]

Description

CTS can use Vault to query sensitive information for CTS configuration and provider configuration with the template function {{ with secret }} (docs). An enhancement to the feature would extend CTS to also monitor Vault for updates and refresh configuration with the latest values.

Use Cases

Rolling sensitive information on Vault: Consul ACL token, Consul enterprise license, provider credentials

Alternative Solutions

Manual restart of each CTS instance to reload any configuration change.