Home Forums HDP on Linux – Installation Users Hosted in Winbind

This topic contains 5 replies, has 3 voices, and was last updated by  Robert 1 year, 5 months ago.

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  • #18441

    Anthony Mattas
    Participant

    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?

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  • #18481

    Robert
    Participant

    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

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    #18479

    Anthony Mattas
    Participant

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

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    #18478

    Robert
    Participant

    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

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    #18473

    Anthony Mattas
    Participant

    So related question -

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

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    #18463

    Sasha J
    Moderator

    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

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