FAQ
Hi

To setup a hadoop cluster following the path A (automated way) in the
cloudera manager installation guide, it is required a 'Uniform SSH access
to cluster hosts on the same port from Cloudera Manager Server host.',
so what dose this means? and how to do that on ubuntu 12.04? thank you.

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  • Adam Smieszny at Dec 13, 2012 at 11:53 am
    Hi Nafaa,

    This means that each host in your cluster should have SSHD running on the
    same port - usually 22. If you start sshd on ubuntu without any
    modifications to /etc/ssh/sshd.conf (going from memory here...), it will
    use this port by default.
    http://www.cyberciti.biz/faq/howto-start-stop-ssh-server/

    Another very helpful thing to make installation easy, is to have the 'root'
    password on each machine in your cluster be the same. We will use that in
    the CM installer to push out the packages and install them on your cluster

    Hope this helps
    Adam


    On Thu, Dec 13, 2012 at 5:14 AM, Nafaa Boutefer wrote:

    Hi

    To setup a hadoop cluster following the path A (automated way) in the
    cloudera manager installation guide, it is required a 'Uniform SSH access
    to cluster hosts on the same port from Cloudera Manager Server host.',
    so what dose this means? and how to do that on ubuntu 12.04? thank you.


    --
    Adam Smieszny
    Cloudera | Systems Engineer | http://www.linkedin.com/in/adamsmieszny
    917.830.4156
  • Nafaa Boutefer at Dec 13, 2012 at 5:43 pm
    Thank you Adam this was very helpful.
    On Thursday, December 13, 2012 12:53:08 PM UTC+1, Adam Smieszny wrote:

    Hi Nafaa,

    This means that each host in your cluster should have SSHD running on the
    same port - usually 22. If you start sshd on ubuntu without any
    modifications to /etc/ssh/sshd.conf (going from memory here...), it will
    use this port by default.
    http://www.cyberciti.biz/faq/howto-start-stop-ssh-server/

    Another very helpful thing to make installation easy, is to have the
    'root' password on each machine in your cluster be the same. We will use
    that in the CM installer to push out the packages and install them on your
    cluster

    Hope this helps
    Adam



    On Thu, Dec 13, 2012 at 5:14 AM, Nafaa Boutefer <nafa...@gmail.com<javascript:>
    wrote:
    Hi

    To setup a hadoop cluster following the path A (automated way) in the
    cloudera manager installation guide, it is required a 'Uniform SSH access
    to cluster hosts on the same port from Cloudera Manager Server host.',
    so what dose this means? and how to do that on ubuntu 12.04? thank you.


    --
    Adam Smieszny
    Cloudera | Systems Engineer | http://www.linkedin.com/in/adamsmieszny
    917.830.4156
  • Patrick Ethier at Dec 13, 2012 at 6:28 pm
    If I may interject, it is more "secure" to create a standard user account
    (call it cdhadmin or something) and place it in the admn group inside
    /etc/group and then make sure this group can use SUDO commands without
    being prompted for a password.

    Then you provide the standard user account to the manager.

    This leaves an "audit trail" that you can track in case somebody gets a
    hold of your password (especially if you offload your sylogs off the server
    in real-time).

    Pat


    On Thu, Dec 13, 2012 at 12:35 PM, Nafaa Boutefer wrote:

    Thank you Adam this was very helpful.

    On Thursday, December 13, 2012 12:53:08 PM UTC+1, Adam Smieszny wrote:

    Hi Nafaa,

    This means that each host in your cluster should have SSHD running on the
    same port - usually 22. If you start sshd on ubuntu without any
    modifications to /etc/ssh/sshd.conf (going from memory here...), it will
    use this port by default.
    http://www.cyberciti.biz/faq/**howto-start-stop-ssh-server/<http://www.cyberciti.biz/faq/howto-start-stop-ssh-server/>

    Another very helpful thing to make installation easy, is to have the
    'root' password on each machine in your cluster be the same. We will use
    that in the CM installer to push out the packages and install them on your
    cluster

    Hope this helps
    Adam



    On Thu, Dec 13, 2012 at 5:14 AM, Nafaa Boutefer wrote:

    Hi

    To setup a hadoop cluster following the path A (automated way) in the
    cloudera manager installation guide, it is required a 'Uniform SSH access
    to cluster hosts on the same port from Cloudera Manager Server host.',
    so what dose this means? and how to do that on ubuntu 12.04? thank you.


    --
    Adam Smieszny
    Cloudera | Systems Engineer | http://www.**linkedin.com/in/adamsmieszny<http://www.linkedin.com/in/adamsmieszny>
    917.830.4156
  • Adam Smieszny at Dec 13, 2012 at 9:19 pm
    Patrick is absolutely correct - you can also (and probably should for
    security) use a uniform account that is NOT root, though an account with
    passwordless sudo, to push the bits.

    On Thu, Dec 13, 2012 at 1:22 PM, Patrick Ethier wrote:

    If I may interject, it is more "secure" to create a standard user account
    (call it cdhadmin or something) and place it in the admn group inside
    /etc/group and then make sure this group can use SUDO commands without
    being prompted for a password.

    Then you provide the standard user account to the manager.

    This leaves an "audit trail" that you can track in case somebody gets a
    hold of your password (especially if you offload your sylogs off the server
    in real-time).

    Pat


    On Thu, Dec 13, 2012 at 12:35 PM, Nafaa Boutefer wrote:

    Thank you Adam this was very helpful.

    On Thursday, December 13, 2012 12:53:08 PM UTC+1, Adam Smieszny wrote:

    Hi Nafaa,

    This means that each host in your cluster should have SSHD running on
    the same port - usually 22. If you start sshd on ubuntu without any
    modifications to /etc/ssh/sshd.conf (going from memory here...), it will
    use this port by default.
    http://www.cyberciti.biz/faq/**howto-start-stop-ssh-server/<http://www.cyberciti.biz/faq/howto-start-stop-ssh-server/>

    Another very helpful thing to make installation easy, is to have the
    'root' password on each machine in your cluster be the same. We will use
    that in the CM installer to push out the packages and install them on your
    cluster

    Hope this helps
    Adam



    On Thu, Dec 13, 2012 at 5:14 AM, Nafaa Boutefer wrote:

    Hi

    To setup a hadoop cluster following the path A (automated way) in the
    cloudera manager installation guide, it is required a 'Uniform SSH access
    to cluster hosts on the same port from Cloudera Manager Server host.',
    so what dose this means? and how to do that on ubuntu 12.04? thank you.


    --
    Adam Smieszny
    Cloudera | Systems Engineer | http://www.**linkedin.com/in/adamsmieszny<http://www.linkedin.com/in/adamsmieszny>
    917.830.4156

    --
    Adam Smieszny
    Cloudera | Systems Engineer | http://www.linkedin.com/in/adamsmieszny
    917.830.4156

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postedDec 13, '12 at 10:14a
activeDec 13, '12 at 9:19p
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