Sure, you can. The ssh-key settings are just an optional configuration that
OSCAR makes for users' convenience even though the root password-less access
cross all the nodes is inevitable during the oscar installation.
Please do whatever you need but I would rather backup the /root/.ssh/ directory
somewhere just in case.
Regards,
- DongInn
Joseph Norris wrote:
> Hi,
>
> Can I just rebuild the keys for head node and then make sure
> authorized_keys files are set correctly on compute nodes?
>
>
>
> DongInn Kim wrote:
>> Hi Joseph,
>>
>> Have you checked to see if your oscarimage(e.g.,
>> /var/lib/systemimager/images/oscarimage) has the same "root/.ssh" as the one
>> of your head node?
>> And please make sure authorized_keys{,2} are properly setup too.
>>
>> If it is not setup properly, the password access of root can not completed.
>>
>> I don't know what happens to your installation but I have never seen this
>> problem on my default installation.
>> If you can provide some detail of your installation, I would like to
>> reproduce your problems and then look into them further.
>>
>> Regards,
>>
>> - DongInn
>>
>>
>> Joseph Norris wrote:
>>
>>> Here is what I did to try to fix this problem. I deleted all the nodes
>>> - re-added the nodes - re-imaged the nodes - re-start on all nodes -
>>> then did a "complete cluster setup" I still get a password request for
>>> root on node1.
>>>
>>> What am I doing wrong on this?
>>>
>>> thanks.
>>>
>>> Joseph Norris wrote:
>>>
>>>> Hmm....
>>>>
>>>> It is in the "complete cluster setup" that I get the request for the
>>>> root passwords.
>>>>
>>>> Michael Edwards wrote:
>>>>
>>>>
>>>>> If you got a password from your user, that means it didn't get its
>>>>> .ssh files set up right either.
>>>>>
>>>>> Did you successfully run the "complete cluster setup" step?
>>>>>
>>>>> You could try running the "complete cluster setup" step again,
>>>>> sometimes that fixes things...
>>>>>
>>>>> On Fri, Aug 1, 2008 at 8:08 PM, Joseph Norris <[EMAIL PROTECTED]> wrote:
>>>>>
>>>>>
>>>>>
>>>>>> Yes I did.
>>>>>>
>>>>>> Michael Edwards wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> It should be set to yes so that is something.
>>>>>>>
>>>>>>> If the passwords are out of sync for root, that is difficult to fix
>>>>>>> without making a new image.
>>>>>>>
>>>>>>> When you ssh from the node as your user, did you get asked for a
>>>>>>> password?
>>>>>>>
>>>>>>> On Fri, Aug 1, 2008 at 2:23 PM, Joseph Norris <[EMAIL PROTECTED]> wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> PermitRootLogin is set to yes in sshd_config. should that be changed
>>>>>>>> or
>>>>>>>> is there something else I need
>>>>>>>>
>>>>>>>> thanks
>>>>>>>>
>>>>>>>> Michael Edwards wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>> Well, it appears you don't have ssh root login enabled on the compute
>>>>>>>>> nodes.
>>>>>>>>>
>>>>>>>>> That will cause the "complete" step to fail. check the sshd.conf file
>>>>>>>>> on the image
>>>>>>>>>
>>>>>>>>> /var/lib/systemimager/images/oscarimage/etc/sshd.conf
>>>>>>>>>
>>>>>>>>> and make sure the enable root login flag is set.
>>>>>>>>>
>>>>>>>>> On Fri, Aug 1, 2008 at 2:03 PM, Joseph Norris <[EMAIL PROTECTED]>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> Ok here is what I do.
>>>>>>>>>>
>>>>>>>>>> I logged into the head node and from the head node I ssh to one of
>>>>>>>>>> the
>>>>>>>>>> compute nodes as the user that I used on the head node. Compute node
>>>>>>>>>> lets me just fine. Then I su - and I put in the root password for
>>>>>>>>>> the
>>>>>>>>>> head node and now I am root on the compute node. home reflects
>>>>>>>>>> everything that is not the head node and the fstab file is as
>>>>>>>>>> follows:
>>>>>>>>>>
>>>>>>>>>> /dev/hda6 / ext3 defaults 1 2
>>>>>>>>>> /dev/hda5 swap swap defaults 0 0
>>>>>>>>>> /dev/hda1 /boot ext3 defaults 1 2
>>>>>>>>>> /dev/shm /dev/shm tmpfs defaults 1 2
>>>>>>>>>> /dev/fd0 /mnt/floppy auto noauto,owner 0 0
>>>>>>>>>> none /dev/pts devpts defaults 0 0
>>>>>>>>>> none /proc proc defaults 0 0
>>>>>>>>>> nfs_oscar:/home /home nfs rw 0 0
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> so it looks like home is getting mounted of the head node.
>>>>>>>>>>
>>>>>>>>>> The question still remains why I can not complete the installation
>>>>>>>>>> from
>>>>>>>>>> the head node.
>>>>>>>>>>
>>>>>>>>>> thanks.
>>>>>>>>>>
>>>>>>>>>> Joseph Norris wrote:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> Hmmm.. I try to ssh in to one of the nodes but it will not accept
>>>>>>>>>>> the
>>>>>>>>>>> root password that I set up when I installed linux.
>>>>>>>>>>>
>>>>>>>>>>> Michael Edwards wrote:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> That generally means that NFS isn't working correctly and the home
>>>>>>>>>>>> directories are not mounted on the nodes. Try sshing into one of
>>>>>>>>>>>> the
>>>>>>>>>>>> problem nodes and mounting the home directory by hand and see if
>>>>>>>>>>>> that
>>>>>>>>>>>> works.
>>>>>>>>>>>>
>>>>>>>>>>>> On Fri, Aug 1, 2008 at 11:44 AM, Joseph Norris <[EMAIL PROTECTED]
>>>>>>>>>>>> <mailto:[EMAIL PROTECTED]>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> Hello to all,
>>>>>>>>>>>>
>>>>>>>>>>>> First of thanks to all that have responded to my very newbie
>>>>>>>>>>>> inquiries.
>>>>>>>>>>>> You have helped a great deal. I got everything installed on
>>>>>>>>>>>> all the
>>>>>>>>>>>> nodes and it went like a dream. Now on the "fat fingers" front
>>>>>>>>>>>> I
>>>>>>>>>>>> inadvertently hit the complete cluster installation without
>>>>>>>>>>>> rebooting
>>>>>>>>>>>> all of the nodes ( I know it says it says it very plainly).
>>>>>>>>>>>>
>>>>>>>>>>>> Well I stopped the script and went and rebooted all the nodes -
>>>>>>>>>>>> all went
>>>>>>>>>>>> well. However when I came back to do the complete cluster
>>>>>>>>>>>> installation
>>>>>>>>>>>> - it keeps coming up with a user root and password prompt. I
>>>>>>>>>>>> just hit
>>>>>>>>>>>> enter thinking it will set up keys but it continues to ask for
>>>>>>>>>>>> passwords.
>>>>>>>>>>>>
>>>>>>>>>>>> What do I do?
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> Joseph Norris
>>>>>>>>>>>> Application Developer & Server Adminstrator
>>>>>>>>>>>> 209-228-4576
>>>>>>>>>>>> [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
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>>>>>>>>>>>> _______________________________________________
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>>>>>>>>>>>> <mailto:Oscar-users@lists.sourceforge.net>
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>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Joseph Norris
>>>>>>>>>> Application Developer & Server Adminstrator
>>>>>>>>>> 209-228-4576
>>>>>>>>>> [EMAIL PROTECTED]
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> -------------------------------------------------------------------------
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>>>>>>>>>> Build the coolest Linux based applications with Moblin SDK & win
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>>>>>>>>>> _______________________________________________
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>>>>>>>>>> Oscar-users@lists.sourceforge.net
>>>>>>>>>> https://lists.sourceforge.net/lists/listinfo/oscar-users
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> -------------------------------------------------------------------------
>>>>>>>>> This SF.Net email is sponsored by the Moblin Your Move Developer's
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>>>>>>>>> Build the coolest Linux based applications with Moblin SDK & win
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>>>>>>>>> _______________________________________________
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>>>>>>>>> Oscar-users@lists.sourceforge.net
>>>>>>>>> https://lists.sourceforge.net/lists/listinfo/oscar-users
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>> --
>>>>>>>> Joseph Norris
>>>>>>>> Application Developer & Server Adminstrator
>>>>>>>> 209-228-4576
>>>>>>>> [EMAIL PROTECTED]
>>>>>>>>
>>>>>>>>
>>>>>>>> -------------------------------------------------------------------------
>>>>>>>> This SF.Net email is sponsored by the Moblin Your Move Developer's
>>>>>>>> challenge
>>>>>>>> Build the coolest Linux based applications with Moblin SDK & win great
>>>>>>>> prizes
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>>>>>>>> _______________________________________________
>>>>>>>> Oscar-users mailing list
>>>>>>>> Oscar-users@lists.sourceforge.net
>>>>>>>> https://lists.sourceforge.net/lists/listinfo/oscar-users
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
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>>>>>>> Build the coolest Linux based applications with Moblin SDK & win great
>>>>>>> prizes
>>>>>>> Grand prize is a trip for two to an Open Source event anywhere in the
>>>>>>> world
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>>>>>>> _______________________________________________
>>>>>>> Oscar-users mailing list
>>>>>>> Oscar-users@lists.sourceforge.net
>>>>>>> https://lists.sourceforge.net/lists/listinfo/oscar-users
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> --
>>>>>>
>>>>>>
>>>>>> Joseph Norris
>>>>>> Programmer III/System Administrator
>>>>>> UC Merced School of Natural Sciences
>>>>>>
>>>>>> Phone: 209-228-4576
>>>>>> Cell: 209-201-3410
>>>>>>
>>>>>>
>>>>>>
>>>>>> -------------------------------------------------------------------------
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>>>>>> Build the coolest Linux based applications with Moblin SDK & win great
>>>>>> prizes
>>>>>> Grand prize is a trip for two to an Open Source event anywhere in the
>>>>>> world
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>>>>>> _______________________________________________
>>>>>> Oscar-users mailing list
>>>>>> Oscar-users@lists.sourceforge.net
>>>>>> https://lists.sourceforge.net/lists/listinfo/oscar-users
>>>>>>
>>>>>>
>>>>>>
>>>>>>
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>>>>> _______________________________________________
>>>>> Oscar-users mailing list
>>>>> Oscar-users@lists.sourceforge.net
>>>>> https://lists.sourceforge.net/lists/listinfo/oscar-users
>>>>>
>>>>>
>>>>>
>>>>
>>>>
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>
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