Cluster distributions?

[Joe Landman]

Anand Vaidya wrote:

>I was amazed to read that one needs to *reinstall* all nodes just to apply one 
>ssh update. Isn't that very wasteful? Then what happens to the custom ssh 
>keys etc?
>
You can simply place the RPM in a shared location and

    cluster-fork "rpm -Fvh /path/to/new-ssh-binary.rpm ; 
/etc/init.d/sshd restart"

You are not forced to use the re-install method, though it is on by 
default.  Turning it off is relatively simple: 

    cluster-fork "/etc/init.d/rocks-grub stop; /sbin/chkconfig --level 
2345 rocks-grub off"

Or you can remove it from the node build tree (instructions in the 
documentation).

As for new ssh keys, I found that I simply have to clear out the 
~/.ssh/known_hosts.  It is annoying to have to do this for all users 
though.  I typically turn off the automatic re-install and default 
re-install for my customers. 

Joe

>
>http://www.rocksclusters.org/errata/Security/ssh-alert.html
>says:
>
>7.Reinstall all compute nodes
> # cluster-fork /boot/kickstart/cluster-kickstart 
>
>Or is there some misunderstanding on my part?
>
>Regards,
>Anand
>
>
>On Friday 19 September 2003 23:48, Robert Kane wrote:
>  
>
>>If no one has already mentioned it,  Rocks (www.rocksclusters.org) is a
>>nice distribution to use. It's a customized distribution of Redhat 7.x.
>>It's stable, runs on a widely used and supported version of Linux, and has
>>all sorts of cluster tools (monitors, schedulers, mpi) integrated. It's
>>generally quick to install, and easy to manage.
>>
>>Robert Kane
>>
>>    
>>
>>>I've been running a very small 4 node beowulf cluster for a project.
>>>Right now I'm running Debian on the cluster and I'm not very happy with
>>>it or the tools available through the distribution.
>>>
>>>Does anyone have any suggestions of a good distribution? What about
>>>MSC.Linux? any good?
>>>I am also looking for tools to automate software installations across all
>>>the nodes, etc.
>>>I like the Debian package system, I just wish there was an easy way to
>>>have the process replicate across all the computers.
>>>      
>>>
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>
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