best way to rotate rabbitmq log files

The best choice is put the log rotate logical inside your rabbitmq.conf file like below:

{log, [
        {file, [{file, "/var/log/rabbitmq/rabbitmq.log"}, %% log.file
                {level, info},        %% log.file.info
                {date, "$D0"},           %% log.file.rotation.date
                {size, 1024},            %% log.file.rotation.size
                {count, 15}            %% log.file.rotation.count
                ]}
    ]},

You can use the command .

rabbitmqctl rotate_logs

Its working for me. Read more from the http://www.rabbitmq.com/configure.html

Hope it will help you.