Package github.com/olomix/chief elects a leader using etcd and runs a pool of workers on leader. If leadership is lost, workers shut down and run on another instance that takes leadership.

• Let Worker.Start return an error; if startup fails, relinquish leadership so another instance can try.
• Support multiple independent elections, one per worker group.
• API to query the current leader.
• API to voluntarily relinquish leadership.
• API to stop and unregister an individual worker.