Users Hosted in Winbind

I’m trying to setup HDP using servers that host the usernames in Winbind. However, unfortunately when trying to install the services its unable to find those users in /etc/passwd so it won’t add them to the groups. They do show up in getent passwd however.

Any thoughts?

Topic

[RobertMember]

Hi Anthony,
In a non-secure mode cluster (default) there is no trust being formed, since the assumption the machines are behind a firewall and are on its own subnet. If you require additional security, hadoop can run also in secure mode, where kerberos is used for authentication.

Regards,
Robert

[Anthony MattasMember]

How do nodes authenticate to each other over RPC? Is there any type of trust formed?

[RobertMember]

Hi Anthony,
In regards to your question, if you are referring to Ambari, ssh is originally used to get into the nodes to install the agents. If you don’t want to enable ssh, you should be able to manually install the ambari-agents on all the nodes. Now when agents are installed, the communication between ambari-server and ambari-agent is via https. As for Hadoop components (jobtracker, namenode, datanodes, task trackers), they communicate via remote procedure calls (RPC) protocol.

Regards,
Robert

[Anthony MattasMember]

So related question -

How does inter-node communication happen? Is it all over SSH? Originally I did Winbind to ensure I had Kerberos available.

[Sasha JModerator]

Anthony,
Winbind if not supported in the current release.
why not to pre-create users ahead of the installation and try installation again?
Or, just use local users…

Thank you!
Sasha

[Author]

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