Go Micro
A framework for distributed systems development
...Authentication and authorization enable secure zero trust networking by providing every service an identity and certificates. This additionally includes rule based access control. Load and hot reload dynamic config from anywhere. The config interface provides a way to load application level config from any source such as env vars, file, etcd. You can merge the sources and even define fallbacks. A simple data store interface to read, write and delete records. It includes support for memory, file and CockroachDB by default.