Geo secondary doesn't show any projects synched

Yesterday @sytses attempted to set up Geo, but the status page just showed this:

It looks like the secondary doesn't think it's a secondary? The geo.log is replete with these messages:

{"severity":"INFO","time":"2017-11-21T00:57:15.819Z","class":"Geo::RepositorySyncWorker","message":"Started scheduler"}
{"severity":"INFO","time":"2017-11-21T00:57:15.820Z","class":"Geo::FileDownloadDispatchWorker","message":"Started scheduler"}
{"severity":"INFO","time":"2017-11-21T00:57:15.849Z","class":"Geo::FileDownloadDispatchWorker","message":"Finished scheduler","total_loops":0,"duration":0.028559312,"reason":"complete"}
{"severity":"INFO","time":"2017-11-21T00:57:15.860Z","class":"Geo::RepositorySyncWorker","message":"Finished scheduler","total_loops":0,"duration":0.041915407,"reason":"complete"}
{"severity":"INFO","time":"2017-11-21T00:58:12.609Z","class":"Geo::RepositorySyncWorker","message":"Started scheduler"}
{"severity":"INFO","time":"2017-11-21T00:58:12.612Z","class":"Geo::FileDownloadDispatchWorker","message":"Started scheduler"}
{"severity":"INFO","time":"2017-11-21T00:58:12.646Z","class":"Geo::FileDownloadDispatchWorker","message":"Finished scheduler","total_loops":0,"duration":0.034033248,"reason":"complete"}
{"severity":"INFO","time":"2017-11-21T00:58:12.674Z","class":"Geo::RepositorySyncWorker","message":"Finished scheduler","total_loops":0,"duration":0.065418658,"reason":"complete"}
{"severity":"INFO","time":"2017-11-21T00:59:17.538Z","class":"Geo::RepositorySyncWorker","message":"Started scheduler"}
{"severity":"INFO","time":"2017-11-21T00:59:17.541Z","class":"Geo::FileDownloadDispatchWorker","message":"Started scheduler"}
{"severity":"INFO","time":"2017-11-21T00:59:17.558Z","class":"Geo::FileDownloadDispatchWorker","message":"Finished scheduler","total_loops":0,"duration":0.01681068,"reason":"complete"}
{"severity":"INFO","time":"2017-11-21T00:59:17.602Z","class":"Geo::RepositorySyncWorker","message":"Finished scheduler","total_loops":0,"duration":0.064501552,"reason":"complete"}
{"severity":"INFO","time":"2017-11-21T01:00:06.797Z","class":"Geo::RepositorySyncWorker","message":"Started scheduler"}