Sorry, realized something -- Director installs CM/CDH 5.7 by default. In order to install 5.8, you'll need to modify the Cloudera Manager repository and CDH parcel repository to point to the most recent versions. The documentation for this can be found here: http://www.cloudera.com/documentation/director/latest/topics/director_get_started_aws_install_cm_cdh.... If you plan on using the command line interface, you'll be able to find the corresponding configuration options here: https://github.com/cloudera/director-scripts/blob/master/configs/aws.reference.conf.