Re: Havana & RBD - a few problems

[Dinu Vlad <dinuvlad13@xxxxxxxxx>]

Under grizzly we disabled completely the image injection via libvirt_inject_partition = -2 in nova.conf. I'm not sure rbd images can even be mounted that way - but then again, I don't have experience with havana. We're using config disks (which break live migrations) and/or the metadata service (which does not) in combination with cloud-init, to bootstrap instances. 

On Nov 7, 2013, at 6:15 PM, Jens-Christian Fischer <jens-christian.fischer@xxxxxxxxx> wrote:

Hi all

we have installed a Havana OpenStack cluster with RBD as the backing storage for volumes, images and the ephemeral images. The code as delivered in https://github.com/openstack/nova/blob/master/nova/virt/libvirt/imagebackend.py#L498 fails, because the RBD.path it not set. I have patched this to read:

• @@ -419,10 +419,12 @@ class Rbd(Image):
• if path:
• try:
• self.rbd_name = path.split('/')[1]
• + self.path = path
• except IndexError:
• raise exception.InvalidDevicePath(path=path)
• else:
• self.rbd_name = '%s_%s' % (instance['name'], disk_name)
• + self.path = 'volumes/%s' % self.rbd_name
• self.snapshot_name = snapshot_name
• if not CONF.libvirt_images_rbd_pool:
• raise RuntimeError(_('You should specify'

but am not sure this is correct. I have the following problems:

1) can't inject data into image

2013-11-07 16:59:25.251 24891 INFO nova.virt.libvirt.driver [req-f813ef24-de7d-4a05-ad6f-558e27292495 c66a737acf0545fdb9a0a920df0794d9 2096e25f5e814882b5907bc5db342308] [instance: 2fa02e4f-f804-4679-9507-736eeebd9b8d] Injecting key into

 image fc8179d4-14f3-4f21-a76d-72b03b5c1862

2013-11-07 16:59:25.269 24891 WARNING nova.virt.disk.api [req-f813ef24-de7d-4a05-ad6f-558e27292495 c66a737acf0545fdb9a0a920df0794d9 2096e25f5e814882b5907bc5db342308] Ignoring error injecting data into image (Error mounting volumes/ instance-0000

0089_disk with libguestfs (volumes/instance-00000089_disk: No such file or directory))

possibly the self.path = … is wrong - but what are the correct values?

2) Creating a new instance from an ISO image fails completely - no bootable disk found, says the KVM console. Related?

3) When creating a new instance from an image (non ISO images work), the disk is not resized to the size specified in the flavor (but left at the size of the original image)

I would be really grateful, if those people that have Grizzly/Havana running with an RBD backend could pipe in here…

thanks

Jens-Christian

-- 
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Jens-Christian Fischer, Peta Solutions
Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland
phone +41 44 268 15 15, direct +41 44 268 15 71
jens-christian.fischer@xxxxxxxxx

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