Major Description
Current docker entry point script takes environment variable DATA_DIR. However it's expected to be a single directory and that's supplied as -fs_wal_dir and not as one would expect -fs_data_dirs.
https://github.com/apache/kudu/blob/master/docker/kudu-entrypoint.sh#L41
https://github.com/apache/kudu/blob/master/docker/kudu-entrypoint.sh#L57-L59
We need to make updates to the entry script to be able to supply separate configuration for data directories. Need to ensure these directories are either created in the script or possibly within kudu server.