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Any hint for a compute Node diskless setup? (only iSCSI NetApp persistant disk for VMs)

asked 2013-03-27 09:12:59 -0500

gug42 gravatar image

updated 2013-03-27 15:49:06 -0500

Razique gravatar image

Hello,

For short story, I'm asking you these question that stay without any answer for me : I'd like to have all my VM with one persistant volume from an iSCSI NetApp SAN. No ephemeral storage at all. And I'd like to have the ability to use livemigration.

For long story, I'm actually evaluating Openstack Folsom.

I have a lab with a "controller node", a "network node", some "compute node", a NetApp SAN with giga and TenGiga ethernet. I have openstack running fine. I can create network (quandtum/ovs), VMs, volumes (on a NetApp storage). I can attache those iSCSI to VM and working with it.

But well I have three need :

  • VM with only persistent iSCSI volume disk
  • Working with diskless hypervisor (and only iSCSI cinder netapp volumes)
  • livemigration support

I duno how to handle the creation of iSCSI volume that can be bootable and contains OS data in a simple and painfull-less way.

From now, the best idea I have : create a VM with a bootable installation iso (cdrom style) and a iSCSI volume, and automaticly install the os on the disk. Well but the cdrom device remain configured into libvirt so livemigration failed.

Can you help me please ?

Thank you in advance

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3 answers

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answered 2013-05-10 16:08:15 -0500

jgriffith gravatar image

Your correct, this feature is not available via the NetApp driver. Here's a wiki page that shows some of the different features and implementations for each driver: https://wiki.openstack.org/wiki/CinderSupportMatrix

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answered 2013-03-27 20:38:13 -0500

lorin gravatar image

updated 2013-03-27 20:39:28 -0500

The OpenStack Compute admin guide has a section on "Boot From Volume", in the "Volumes" chapter

The link is:

http://docs.openstack.org/folsom/openstack-compute/admin/content/boot-from-volume.html

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Hi Boot- from -Volume option has a fix in next version of Openstack. viz Grizzly.. it was also discussed in one of the forum recently...Please check the above as well..and good luck..

Shyam Yeduru gravatar imageShyam Yeduru ( 2013-03-27 22:26:13 -0500 )edit
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answered 2013-03-28 04:53:42 -0500

gug42 gravatar image

updated 2013-03-28 04:54:26 -0500

Hello,

First thank you for the answers.

The process describe in the documentation is too much painfull at large scale ;).

I think you speak abouth this thread (original question from me lol) : http://www.mail-archive.com/openstack@lists.launchpad.net/msg20149.html

Is it really implemented for all storage backend in grizzly ? because I don't find "copyimageto_volume" in the netapp volume driver (netapp.py). I was looking into the github code ;)

I didn't find the a link to the "forum"

Regards,

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Asked: 2013-03-27 09:12:59 -0500

Seen: 1,299 times

Last updated: May 10 '13