1. Back up Current Data

  1. Stop the original Ambari Server.

    ambari-server stop
  2. Create a directory to hold the database backups.

    cd /tmp
    mkdir dbdumps
    cd dbdumps/
  3. Create the database backups.

    pg_dump -U $AMBARI-SERVER-USERNAME ambari > ambari.sql Password: $AMBARI-SERVER-PASSWORD 
    pg_dump -U $MAPRED-USERNAME ambarirca > ambarirca.sql Password: $MAPRED-PASSWORD

    Substitute the values you set up at installation for $AMBARI-SERVER-USERNAME, $MAPRED-USERNAME, $AMBARI-SERVER-PASSWORD, and $MAPRED-PASSWORD. Defaults are ambari-server/bigdata and mapred/mapred.

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