I am trying to use glance-replicator, which I installed from the git master branch, but I always get an unrecognized arguments error, even though I think I'm providing the proper arguments.

$ glance-replicator help compare
glance-replicator compare <fromserver:port> <toserver:port>

    Compare the contents of fromserver with those of toserver.

    fromserver:port: the location of the master glance instance.
    toserver:port:   the location of the slave glance instance.

So I follow that with:

$ glance-replicator compare az1:9292 az3:9292
usage: glance-replicator [-h] [--chunksize CHUNKSIZE] [--config-dir DIR]
                         [--config-file PATH] [--debug]
                         [--dontreplicate DONTREPLICATE]
                         [--log-config-append PATH]
                         [--log-date-format DATE_FORMAT] [--log-dir LOG_DIR]
                         [--log-file PATH] [--log-format FORMAT]
                         [--mastertoken MASTERTOKEN] [--metaonly] [--nodebug]
                         [--nometaonly] [--nouse-syslog]
                         [--nouse-syslog-rfc-format] [--noverbose]
                         [--nowatch-log-file] [--slavetoken SLAVETOKEN]
                         [--syslog-log-facility SYSLOG_LOG_FACILITY]
                         [--token TOKEN] [--use-syslog]
                         [--use-syslog-rfc-format] [--verbose] [--version]
                         [--watch-log-file]
                         [command] [args]
glance-replicator: error: unrecognized arguments: az3:9292
Please specify one command

Why is this happening?