Leader empty if single server node

[knightsg]

Describe the bug
Calling /v1/leader when there is only one node results in a successful HTTP result with an empty response.

To Reproduce

1. Start a single dkron server node.
2. Call http://[hostname or ip]/v1/leader.

Expected behavior
The API returns an HTTP 200 response with a response body that includes a json object with an 'Addr' attribute (the node's IP), eg:

{"Name":"1f6e0721a1dd","Addr":"172.18.0.3","Port":8946,"Tags":{"dc":"dc1","region":"global","role":"dkron","version":"2.0.3"},"Status":1,"ProtocolMin":1,"ProtocolMax":5,"ProtocolCur":2,"DelegateMin":2,"DelegateMax":5,"DelegateCur":4}

Observed behaviour
The API returns an HTTP 200 with an empty response body.

Specifications:

OS: Windows 10 v1903, Firefox browser (also tested using python 2.7 script calling API from an Ubuntu 16.04.3 session with the same result)
Version: Dkron 2.0.3

[vcastellm]

@knightsg I think the description is wrong, when there is a leader the leader data is returned, did you mean that there's a 200 code even when there is no leader elected?

[knightsg]

It does return 200 even if there is no leader. I guess my confusion was because I was misunderstanding the designation of the server vs agent vs leader.

Additionally though, I currently am playing with a 2 node cluster (using docker) yet the leader endpoint is still returning a blank response. If I query the members endpoint I get the following:

[{"Name":"89571d545c59","Addr":"172.18.0.2","Port":8946,"Tags":{"dkron_rpc_addr":"172.18.0.2:6868","dkron_server":"true","dkron_version":"1.2.5"},"Status":1,"ProtocolMin":1,"ProtocolMax":5,"ProtocolCur":2,"DelegateMin":2,"DelegateMax":5,"DelegateCur":4},{"Name":"2d2513ddea06","Addr":"172.18.0.3","Port":8946,"Tags":{"dkron_server":"false","dkron_version":"1.2.5"},"Status":1,"ProtocolMin":1,"ProtocolMax":5,"ProtocolCur":2,"DelegateMin":2,"DelegateMax":5,"DelegateCur":4}]

Any idea why /v1/leader still returns an empty response? Have i misconfigured this cluster?