Add Flume in Ambari

1. Click on Aded Service from the Ambari interface.
   
2. Flume service available in HDP is 1.5.2. Choose this service to be installed.
   
3. Pick where to install the Flume service. In this case, Flume is added to the namenode. The services can be moved to another node by using Ambari.
   
4. In step Customize Services, Flume agent can be configured. This can be done after the service is installed. For now, let it be empty.
   
5. In step Review, click on Deploy
   
6. After the install, the service is started and tested. If everything goes well, the green progress bar shows up
   
7. The summary warns you that some services would have to be restarted so that Flume can function properly. This is a generic message. In case of installing only Flume, no restart of existing services is needed.
   

Work in Linux

1. User flume is added automatically by Ambari and it belongs to group hadoop.
   

Work in HDFS

1. In order for user flume to work properly on HDFS, flume folder has to be created under /user in HDFS. For example, in case of deleting files in HDFS as user flume, deleted files are moved to /user/flume.Create /user/flume in HDFS.

   sudo -u hdfs hadoop fs -mkdir /user/flume

   Give ownership to user flume.

   sudo -u hdfs hadoop fs -chown flume /user/flume

   Give read, write and execute to flume and flume’s HDFS group – hdfs.

   sudo -u flume hadoop fs -chmod 770 /user/flume