Comment 2 for bug 1824131

No I don't think this is mean't to work:

ceilometer.event.publisher =
    test = ceilometer.publisher.test:TestPublisher
    notifier = ceilometer.publisher.messaging:EventNotifierPublisher
    http = ceilometer.publisher.http:HttpPublisher
    https = ceilometer.publisher.http:HttpPublisher
    gnocchi = ceilometer.publisher.gnocchi:GnocchiPublisher
    zaqar = ceilometer.publisher.zaqar:ZaqarPublisher

'file' is not listed as a entry point for the event publisher in Ceilometer