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setupuser.md

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  1. Create user for PredictionIO aml in each server

    adduser aml # Give it some password

  2. Give the "aml" user sudoers permissions and login to the new user. This setup assumes the aml user as the owner of all services including Spark and Hadoop (HDFS).

    usermod -a -G sudo aml
sudo su - aml

  3. Setup passwordless ssh between all hosts of the cluster. This is a combination of adding all public keys to authorized_keys and making sure that known_hosts includes all cluster hosts, including any host to itself. There must be no prompt generated when any host tries to connect via ssh to any other host. Note: The importance of this cannot be overstated! If ssh does not connect without requiring a password and without asking for confirmation nothing else in the guide will work!