how to add more than one user to hadoop with DFS permissions?

[Austin Chungath <au...@gmail.com>]

I have a 2 node cluster running hadoop 0.20.205. There is only one user ,
username: hadoop of group: hadoop.
What is the easiest way to add one more user say hadoop1 with DFS
permissions set as true?

I did the following to create a user in the master node.
sudo adduser --ingroup hadoop hadoop1

My aim is to have hadoop run in such a way that each user input and output
data is accessible only to the owner (chmod 700).
I did play around with the configuration properties for sometime now but to
no end.

It would be great if some one could tell me what are the configuration file
properties that I should change to achieve this?

Thanks,
Austin

Re: how to add more than one user to hadoop with DFS permissions?

[Austin Chungath <au...@gmail.com>]

Thanks Harsh :)

On Sat, Mar 10, 2012 at 10:12 PM, Harsh J <ha...@cloudera.com> wrote:

> Austin,
>
> 1. Enable HDFS Permissions. In hdfs-site.xml, set "dfs.permissions" as
> "true".
>
> 2. To commission any new user, as HDFS admin (the user who runs the
> NameNode process), run:
> hadoop fs -mkdir /user/<username>
> hadoop fs -chown <username>:<username> /user/<username>
>
> 3. For default file/dir permissions to be 700, tweak the dfs.umaskmode
> property.
>
> Much of this is also documented at the permissions guide:
> http://hadoop.apache.org/common/docs/r0.20.2/hdfs_permissions_guide.html
>
> On Sat, Mar 10, 2012 at 9:59 PM, Austin Chungath <au...@gmail.com>
> wrote:
> > I have a 2 node cluster running hadoop 0.20.205. There is only one user ,
> > username: hadoop of group: hadoop.
> > What is the easiest way to add one more user say hadoop1 with DFS
> > permissions set as true?
> >
> > I did the following to create a user in the master node.
> > sudo adduser --ingroup hadoop hadoop1
> >
> > My aim is to have hadoop run in such a way that each user input and
> output
> > data is accessible only to the owner (chmod 700).
> > I did play around with the configuration properties for sometime now but
> to
> > no end.
> >
> > It would be great if some one could tell me what are the configuration
> file
> > properties that I should change to achieve this?
> >
> > Thanks,
> > Austin
>
>
>
> --
> Harsh J
>

Re: how to add more than one user to hadoop with DFS permissions?

[Harsh J <ha...@cloudera.com>]

Austin,

1. Enable HDFS Permissions. In hdfs-site.xml, set "dfs.permissions" as "true".

2. To commission any new user, as HDFS admin (the user who runs the
NameNode process), run:
hadoop fs -mkdir /user/<username>
hadoop fs -chown <username>:<username> /user/<username>

3. For default file/dir permissions to be 700, tweak the dfs.umaskmode property.

Much of this is also documented at the permissions guide:
http://hadoop.apache.org/common/docs/r0.20.2/hdfs_permissions_guide.html

On Sat, Mar 10, 2012 at 9:59 PM, Austin Chungath <au...@gmail.com> wrote:
> I have a 2 node cluster running hadoop 0.20.205. There is only one user ,
> username: hadoop of group: hadoop.
> What is the easiest way to add one more user say hadoop1 with DFS
> permissions set as true?
>
> I did the following to create a user in the master node.
> sudo adduser --ingroup hadoop hadoop1
>
> My aim is to have hadoop run in such a way that each user input and output
> data is accessible only to the owner (chmod 700).
> I did play around with the configuration properties for sometime now but to
> no end.
>
> It would be great if some one could tell me what are the configuration file
> properties that I should change to achieve this?
>
> Thanks,
> Austin



-- 
Harsh J