[Beowulf] CentOS/RHEL 7 & major upgrades

Prentice Bisbal prentice.bisbal at rutgers.edu
Tue Feb 24 15:52:46 PST 2015

On 02/24/2015 04:54 PM, Orion Poplawski wrote:
> On 02/23/2015 12:40 PM, Prentice Bisbal wrote:
>> On 02/20/2015 11:22 PM, Orion Poplawski wrote:
>>> On 02/13/2015 01:00 AM, Olli-Pekka Lehto wrote:
>>>> Hi,
>>>> I’d be interested to hear if people have deployed or upgraded CentOS/EL 7
>>>> on their clusters and what their experiences are? Also in the more general
>>>> sense, what kind of distro upgrade philosophy do you follow? Are there a
>>>> long-term roadmaps that you build internally, for example?
>>>> Recently I’ve had some internal discussions about the prospect schedule of
>>>> upgrading our systems from CentOS 6.x to 7. I’m not really keen on
>>>> upgrading a major distro version unless there is a _really_ compelling
>>>> reason to do so, especially as we have driver dependencies to Mellanox IB,
>>>> Lustre, Tesla and Xeon Phi as well as a lot of ISV codes. However, it would
>>>> be nice to hear what the current pain/benefit ratio of such an upgrade is.
>>> One issue hindering me:
>>> https://bugzilla.redhat.com/show_bug.cgi?id=1177032
>>> kickstart install on machine with infiniband interfaces crashes
>> First, I admit to not understanding the problem in the  bug report 100%. Is it
>> possible that you could pass a kernel argument to tell it not to try to probe
>> for IB interfaces, or something similar. I know this works for video cards,
>> etc., when they cause an install to hang.
>> Prentice
> It's actually quite probable that if I didn't try to configure the ipoib
> interface in kickstart the install would go fine.

I recommend you leave it out of  your initial kickstart then, and try to 
configure it in the post-install script, or after kickstart is 
completely done with whatever configuration management tool you use. 
This wouldn't be the first time using kickstart as documented breaks 
something, and I'm sure it won't be the last.

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