ssh key injection fails for instances booted from remote volumes

[Giulio Fidente]

ssh key injection expects the instance's disk image to be available locally and fails if the instance is booted from a remote cinder volume

compute.log reports something like the following:

WARNING nova.virt.disk.api [req-bd4be1ec-1d62-4da3-a194-b82003553709 8165f2c0a4d945a3ad61cdfc82bc71e8 6a89483177bd4301bba60d6ebd095e52] Ignoring error injecting data into image (Error mounting /var/lib/nova/instances/c8964c15-47b6-459e-8731-bd06d05be1f1/disk with libguestfs (/var/lib/nova/instances/c8964c15-47b6-459e-8731-bd06d05be1f1/disk: No such file or directory))

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/33221

[Lingxian Kong (kong)]

Key, metadata, password, files ... do not support injection When using cinder backend system volume, is it the expected bahavior? Or, is there some reason that we do not know, but has been talked about before.

[wingwj (wingwj)]

Hi Yaguang Tang, do you continue modifying this issue? I met the same problem right now.

[Yaguang Tang (heut2008)]

wingwj, I'll pick it up again and try to fix.

[Ray Chen (chenrano2002)]

in current code virt/libvirt/driver.py:_inject_data

there is one function ' injection_image.check_image_exists' to help check whether disk image is there.
if not, just print warn and do NOT handle file injection.

2511 if any((key, net, metadata, admin_pass, files)):
2512 injection_image = self.image_backend.image(
2513 instance,
2514 'disk' + suffix,
2515 image_type)
2516 img_id = instance['image_ref']
2517
2518 try:
2519 if injection_image.check_image_exists():
2520 disk.inject_data(injection_image.path,
2521 key, net, metadata, admin_pass, files,
2522 partition=target_partition,
2523 use_cow=CONF.use_cow_images,
2524 mandatory=('files',))
2525 else:
2526 LOG.warn(_LW('Image %s not found on disk storage. '
2527 'Continue without injecting data'),
2528 injection_image.path, instance=instance)
2529 except Exception as e:
2530 with excutils.save_and_reraise_exception():
2531 LOG.error(_LE('Error injecting data into image '
2532 '%(img_id)s (%(e)s)'),
2533 {'img_id': img_id, 'e': e},
2534 instance=instance)

reference: http://openstack.10931.n7.nabble.com/nova-libvirt-Should-file-injection-work-for-boot-from-volume-images-td19568.html