Basic dockerfile for fluentd. Default entrypoint ensures proper ownership of required directores as root prior to starting fluentd as user fluent via dosu (so that host volumes can be mounted in without worrying about permissions and uids).
Location of fluent.conf and plugins directory is configurable via the FLUENTD_DATA_DIR environment variable but defaults to /home/fluent if not set. Mount your conf file and plugins folder in this directory.
You can start fluentd with additional options by setting the FLUENTD_OPT environment variable.