Need help on user and its access in HDFS for HDP2.5.0.

das_dineshk — Tue, 31 Jan 2017 20:24:03 GMT

Need help on user and its access in HDFS.

In HDP2.5 , while working on HDFS authorization with Apache Ranger, I found , am unable to change file permission as a root user. Can someone please help what would be the user and its default access credentials.

[root@sandbox ~]# hdfs dfs -ls /user

Found 16 items

drwxr-xr-x - admin hdfs 0 2017-01-11 08:28 /user/admin

drwxrwx--- - ambari-qa hdfs 0 2016-10-25 07:47 /user/ambari-qa

drwxr-xr-x - amy_ds hdfs 0 2016-10-25 08:02 /user/amy_ds

drwxr-xr-x - hbase hdfs 0 2016-10-25 07:48 /user/hbase

drwxr-xr-x - hcat hdfs 0 2016-10-25 07:51 /user/hcat

drwxr-xr-x - hive hdfs 0 2017-01-19 13:25 /user/hive

drwxr-xr-x - holger_gov hdfs 0 2016-10-25 08:03 /user/holger_gov

drwxrwxr-x - livy hdfs 0 2016-10-25 07:49 /user/livy

drwxr-xr-x - maria_dev hdfs 0 2017-01-05 14:35 /user/maria_dev

drwxrwxr-x - oozie hdfs 0 2016-10-25 07:52 /user/oozie

drwxr-xr-x - raj_ops hdfs 0 2017-01-11 08:29 /user/raj_ops

drwx------ - root hdfs 0 2017-01-19 10:34 /user/root

drwxrwxr-x - spark hdfs 0 2016-10-25 07:48 /user/spark

drwxr-xr-x - vz_all hdfs 0 2017-01-12 10:58 /user/vz_all

drwxr-xr-x - vz_vdsi hdfs 0 2017-01-19 14:18 /user/vz_vdsi

drwxr-xr-x - zeppelin hdfs 0 2016-10-25 07:50 /user/zeppelin

[root@sandbox ~]# hdfs dfs -chmod -R 700 /user/hive 17/01/31 12:11:18 WARN retry.RetryInvocationHandler: Exception while invoking ClientNamenodeProtocolTranslatorPB.setPermission over null. Not retrying because try once and fail. org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException): Permission denied. user=root is not the owner of inode=hive

at org.apache.hadoop.fs.FsShell.main(FsShell.java:350) chmod: changing permissions of '/user/hive': Permission denied. user=root is not the owner of inode=hive [root@sandbox ~]# exit

am trying to follow instructions mentioned in below URL.

http://hortonworks.com/blog/best-practices-in-hdfs-authorization-with-apache-ranger/

Re: Need help on user and its access in HDFS for HDP2.5.0.

tstebbens — Tue, 31 Jan 2017 20:41:26 GMT

@Dinesh Das Try running the chmod command as user 'hdfs':

su - hdfs -c 'hdfs dfs -chmod -R 700 /user/hive'

In HDFS, 'root' doesn't have any special access but the user 'hdfs' is considered a super-user so can read/write any file.

Re: Need help on user and its access in HDFS for HDP2.5.0.

das_dineshk — Tue, 31 Jan 2017 21:16:29 GMT

Thank you Sir, much appreciated 🙂

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Need help on user and its access in HDFS for HDP2.5.0.

Re: Need help on user and its access in HDFS for HDP2.5.0.

Re: Need help on user and its access in HDFS for HDP2.5.0.