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From Yusaku Sako <yus...@hortonworks.com>
Subject Re: Problem with Ambari 1.7 recognizing hosts running CentOS 6
Date Sat, 13 Dec 2014 06:46:37 GMT
You can just make the changes in /etc/hosts.  You might also
change /etc/sysconfig/network and run /etc/init.d/network restart.

Then make sure that running the 3 commands return expected results.

Yusaku

On Fri, Dec 12, 2014 at 9:06 PM, David Novogrodsky <
david.novogrodsky@gmail.com> wrote:
>
> ​When I installed the CentOS on the machines, I chose those name,
> localhost.datanode01...and so on.  You mean I have to reinstall CentOS on
> the machines again?
>
> Can I just make the changes in the host files?
>
> Will I need to recreate the SSH keys?.​
>
> David Novogrodsky
> david.novogrodsky@gmail.com
> http://www.linkedin.com/in/davidnovogrodsky
>
> On Fri, Dec 12, 2014 at 6:21 PM, Yusaku Sako <yusaku@hortonworks.com>
> wrote:
>
>> I would set it up like this:
>>
>> 127.0.0.1 localhost localhost.localdomain localhost4
>> localhost4.localdomain4*   <- do not list the hostname here. *
>> ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
>> xxx.xxx.200.144 datanode10.localdomain
>> xxx.xxx.200.107 datanode01.localdomain
>> xxx.xxx.200.143 namenode.localdomain namenode
>>
>> With this change:
>> * *hostname -f* should display *namenode.localdomain*
>> * *hostname* should display *namenode*
>> * *python -c 'import socket; print socket.getfqdn()' *should display
>> *namenode.localdomain*
>>
>> I hope this helps.
>> Yusaku
>>
>> On Fri, Dec 12, 2014 at 3:52 PM, David Novogrodsky <
>> david.novogrodsky@gmail.com> wrote:
>>>
>>> All,
>>>
>>> I am having a problem with Ambari.
>>> I am trying to use Ambari to install Hadoop to a three node cluster. the
>>> name node is where the Ambari server is located. I am getting this error:
>>> ERROR 2014-12-12 17:39:56,963 main.py:137 – Ambari agent machine
>>> hostname (localhost.localdomain) does not match expected ambari server
>>> hostname (namenode). Aborting registration. Please check hostname, hostname
>>> -f and /etc/hosts file to confirm your hostname is setup correctly
>>> ‘, None)
>>>
>>> Here is the contents of my hosts file:
>>> 127.0.0.1 localhost localhost.localdomain localhost4
>>> localhost4.localdomain4 localhost.namenode namenode
>>> ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
>>> xxx.xxx.200.144 localhost.datanode10
>>> xxx.xxx.200.107 localhost.datanode01
>>> xxx.xxx.200.143 localhost.namenode namenode
>>>
>>> I am not sure what the problem is. Since there are only four steps to
>>> run ambari there is not a lot of background to determine the cause of this
>>> problem.
>>>
>>> David Novogrodsky
>>> david.novogrodsky@gmail.com
>>> http://www.linkedin.com/in/davidnovogrodsky
>>>
>>
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>

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