Converting a Data Fabric Cluster from Root to Non-Root User from the Command-Line

Lists the process to change the running user from root to a non-root user on a cluster.

Procedure

  1. Create a user with the same UID/GID across the cluster. Assign that user to the MAPR_USER environment variable.
  2. On each node:
    1. Stop the warden and the ZooKeeper (if present). 
      service mapr-warden stop
service mapr-zookeeper stop
    2. Run the config-mapr-user.sh script to configure the cluster to start as the non-root user. 
      /opt/mapr/server/config-mapr-user.sh -u <MapR user> [-g <MapR group>]
    3. Start the ZooKeeper (if present) and the warden. 
      service mapr-zookeeper start
service mapr-warden start
  3. After the previous step is complete on all nodes in the cluster, run the upgrade2mapruser.sh script on all nodes. 
    /opt/mapr/server/upgrade2mapruser.sh

    This command may take several minutes to return. The script waits ten minutes for the process to complete across the entire cluster. If the cluster-wide operation takes longer than ten minutes, the script fails. Re-run the script on all nodes where the script failed.

    WARNING
    The MAPR_UID_MISMATCH alarm may be raised during this process. The alarm will be cleared when this process is complete on all nodes.