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Multinode architecture

asked 2011-04-29 19:43:34 -0500

diego-lalo gravatar image
      Hi everyone, I would like to install openstack in a multinode environment, I would like to know what services should run and be configured on the CloudController and what services should run and be configured on the ComputeNode, I read the documentation and is not clear for me. With services I mean nova-compute, nova-scheduler, etc. What services should run in the CloudController and what services should run in the ComputeNode. I also would like to know what should I put in nova.conf of each node.

Cheers Diego

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answered 2011-05-02 19:01:55 -0500

graham-hemingway gravatar image

I believe the same holds for both the rabbit and SQL machines, as long as you are using MySQL or Postgres. Obviously Sqlite wouldn't do.

On May 2, 2011, at 2:52 PM, Diego Lalo question154854@answers.launchpad.net wrote:

Question #154854 on OpenStack Compute (nova) changed: https://answers.launchpad.net/nova/+question/154854 (https://answers.launchpad.net/nova/+q...)

Diego Lalo posted a new comment: Ohh I forgot about rabbit messaging system, the service could reside in a separate machine too?

Cheers Diego


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answered 2011-05-02 18:52:57 -0500

diego-lalo gravatar image

Ohh I forgot about rabbit messaging system, the service could reside in a separate machine too?

Cheers Diego

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answered 2011-05-02 18:46:09 -0500

diego-lalo gravatar image

Thanks Graham Hemingway, that solved my question.

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answered 2011-05-02 18:23:52 -0500

graham-hemingway gravatar image

To paraphrase what Hugo said. As far as we users know, yes, each service can reside on a separate physical machine. The only one that I know documentation says needs to co-reside is dashboard (with nova-API).

Cheers, Graham

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answered 2011-05-02 18:10:13 -0500

diego-lalo gravatar image

Hi Hugo, nova-network and nova-scheduler were only an example, my real question is if I can separate all the services into one physical machine for each other and if not what services should be grouped together :)

Thanx for your quick answer Cheers Diego

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answered 2011-05-02 17:47:19 -0500

tonytkdk gravatar image

I think network & scheduler could be separated.....

Scheduler's work is very simple, Just decides which compute node will be use for running instance....

And nova-network is responsible for allocate IP to instance from fixed_ip pool / redirect metadata routing to API server....

That's my reason....

How about try a simple test.....? To split nova-scheduler into a single physical machine, you'll get the answer. The most complex part of nova-services is Nova-Network in my experience :)

nova-volume yes nova-network yes nova-api yes nova-objectstore not sure nova-scheduler yes glance not sure , but I think yes nova-compute yes Dashboard must live with API server

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answered 2011-05-02 16:12:39 -0500

diego-lalo gravatar image

I have a question :) can the nova services be splitted each one into a physical machine? I mean, can nova-network be into a physical machine and nova-scheduler into another and so on, or they should be grouped in a particular way?

Cheers Diego

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answered 2011-04-29 22:45:02 -0500

graham-hemingway gravatar image

Check out Hugo's blog for some good information. But, in the end, it really depends on how you want to carve things up. Take a look at the blog and then see if you still have questions.

http://hugokuo-hugo.blogspot.com/2011/04/this-topology-works-fine-with-bzr-984.html (http://hugokuo-hugo.blogspot.com/2011...)

Cheers, Graham

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Asked: 2011-04-29 19:43:34 -0500

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Last updated: May 02 '11