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OpenStack on a beowulf Cluster

asked 2013-11-24 16:56:36 -0500

barchuleta gravatar image

Hi,

I have a cluster of 200 Dell Optiplex 760's pst have 2GB of RAM (Some have 4) and range between 2.8 - 3GHz clock speed. I was wondering if it would be possible to install OpenStack across this machines to create a small underpowered private cloud. Ideally I would like to spawn VM's on the fly for research computing, mainly gsnap/gmap, hadoop, and some other instances.

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answered 2013-11-24 18:38:24 -0500

fifieldt gravatar image

updated 2013-11-24 18:39:57 -0500

Yes, that will work fine - I believe the CPUs in the 760s all supported "Intel® Virtualization Technology (VT-x)", which should run KVM OK.

What you have to watch is the size of your virtual machines (the 'flavours').

A 2 core machine with 2GB of RAM isn't going to be able to run so many. However, perhaps you're looking at scheduling 1 VM per machine for scientific workloads, in which case you probably wouldn't be looking at oversubscription anyway.

Just follow the install guides here: http://docs.openstack.org/havana/ - and simply loop through the "Configure a Compute node" section 200 times :) You'll need to experiment with how many nodes running the 'control' infrastructure you need.

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Hi fifieldt, I was planning on 1 Ubuntu VM per physical host, and using OpenStack to insure a clean environment on every run. Right now we are using PBS on the 200 nodes and they only get an OS refresh every 3 months. I just need to find a way to intelligently spawn a Torque/Maui install on every machine thats spawned.

barchuleta gravatar imagebarchuleta ( 2013-11-24 18:44:28 -0500 )edit

Sounds good. You can use the metadata service to run a script on boot, or make an image that starts up something like puppet.

fifieldt gravatar imagefifieldt ( 2013-11-24 23:35:36 -0500 )edit

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Asked: 2013-11-24 16:56:36 -0500

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Last updated: Nov 24 '13