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Is it possible to use VMs for OpenStack nodes?

asked 2014-05-03 14:55:43 -0500

linuxgurugamer gravatar image

We are going to have 3 hefty systems (256 gig memory, > 1 tbyte hard disk each + external NAS, 4 hex-core cpus). I was thinking of putting some of the OpenStack systems into VMs on one or more of the systems. Essentially, I need all three systems to be running VMs

Does this make sense, is it a danger to the stack?

Would it make sense to get some smaller systems to run the OpenStack software? If so, what size systems would be needed. Our total environment will probably be somewhere between 20 and 40 physical servers, with somewhere geather than 300-400 VMs running across the entire installation.

Thanks in advance.


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answered 2014-05-05 00:16:15 -0500

SGPJ gravatar image

Yes, you can use VMs for nodes. However by adding more virtual layers (Openstack + KVM on VMs over Physical Servers) the performance will be little slow when compared to bare metal installation (Openstack + KVM on Physical Servers).

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Give VM (running Openstack Compute) sufficient RAM, vCPUs & storage then install openstack services..

SGPJ gravatar imageSGPJ ( 2014-05-05 02:06:33 -0500 )edit

answered 2014-05-05 01:53:02 -0500

If I correctly understand, you want to use these 3 nodes as OpenStack compute nodes only, putting controller/network nodes on other physical/virtual machines; of course you can do such a thing, if you want details on how to better design or tune up your installation you could read official operation guide.

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Asked: 2014-05-03 14:55:43 -0500

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Last updated: May 05 '14