Boot instance with bdm source=image dest=local/None cannot work

[Zhenyu Zheng]

In http://docs.openstack.org/developer/nova/block_device_mapping.html#block-device-mapping-v2 we are saying that for using source=image dest=local/None(seems None is
treated as local) we should also provide image ref, but the fact is that if do so,
we got:

nova --debug boot --image afbbcd5c-bed7-40a7-a9c0-0d4f57b05615 --block-device id=afbbcd5c-bed7-40a7-a9c0-0d4f57b05615,source=image,dest=local,bootindex=0 --nic net-id=1b7a7c1d-d266-4c77-bdcd-ed4ac76fd5cb --flavor 1 test_2

...

DEBUG (session:347) REQ: curl -g -i -X POST http://10.3.150.17:8774/v2.1/os-volumes_boot -H "Accept: application/json" -H "User-Agent: python-novaclient" -H "OpenStack-API-Version: compute 2.40" -H "X-OpenStack-Nova-API-Version: 2.40" -H "X-Auth-Token: {SHA1}853d1b6e6ed06716c424d38e5891b205ce7b949e" -H "Content-Type: application/json" -d '{"server": {"name": "test_2", "imageRef": "afbbcd5c-bed7-40a7-a9c0-0d4f57b05615", "block_device_mapping_v2": [{"source_type": "image", "delete_on_termination": true, "boot_index": 0, "uuid": "afbbcd5c-bed7-40a7-a9c0-0d4f57b05615", "destination_type": "local"}, {"source_type": "image", "delete_on_termination": true, "boot_index": "0", "uuid": "afbbcd5c-bed7-40a7-a9c0-0d4f57b05615", "destination_type": "local"}], "flavorRef": "1", "max_count": 1, "min_count": 1, "networks": [{"uuid": "1b7a7c1d-d266-4c77-bdcd-ed4ac76fd5cb"}]}}'
...

DEBUG (shell:934) Block Device Mapping is Invalid: Boot sequence for the instance and image/block device mapping combination is not valid. (HTTP 400) (Request-ID: req-f848c6c1-0961-46c4-ac51-713fde042215)
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/novaclient/shell.py", line 932, in main
    OpenStackComputeShell().main(argv)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/shell.py", line 859, in main
    args.func(self.cs, args)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/v2/shell.py", line 721, in do_boot
    server = cs.servers.create(*boot_args, **boot_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/v2/servers.py", line 1353, in create
    **boot_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/v2/servers.py", line 753, in _boot
    return_raw=return_raw, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/base.py", line 359, in _create
    resp, body = self.api.client.post(url, body=body)
  File "/usr/local/lib/python2.7/dist-packages/keystoneauth1/adapter.py", line 223, in post
    return self.request(url, 'POST', **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 87, in request
    raise exceptions.from_response(resp, body, url, method)
BadRequest: Block Device Mapping is Invalid: Boot sequence for the instance and image/block device mapping combination is not valid. (HTTP 400) (Request-ID: req-f848c6c1-0961-46c4-ac51-713fde042215)
ERROR (BadRequest): Block Device Mapping is Invalid: Boot sequence for the instance and image/block device mapping combination is not valid. (HTTP 400) (Request-ID: req-f848c6c1-0961-46c4-ac51-713fde042215)

And if I don't provide image param, it goes:

2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [req-bfdf5437-657a-44ed-8d81-d1bfec43dcf5 59984487adce478494232df1cf41dbf9 b7c4a4d1de6b43f2bf013deee06400cd - - -] [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] Instance failed to spawn
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] Traceback (most recent call last):
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/compute/manager.py", line 2125, in _build_resources
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] yield resources
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/compute/manager.py", line 1930, in _build_and_run_instance
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] block_device_info=block_device_info)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2676, in spawn
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] block_device_info=block_device_info)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 3081, in _create_image
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] fallback_from_host)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 3197, in _create_and_inject_local_root
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] instance, size, fallback_from_host)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 6758, in _try_fetch_image_cache
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] size=size)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/imagebackend.py", line 227, in cache
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] *args, **kwargs)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/imagebackend.py", line 569, in create_image
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] prepare_template(target=base, *args, **kwargs)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py", line 271, in inner
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] return f(*args, **kwargs)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/imagebackend.py", line 223, in fetch_func_sync
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] fetch_func(target=target, *args, **kwargs)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/libvirt/utils.py", line 458, in fetch_image
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] images.fetch_to_raw(context, image_id, target)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/images.py", line 127, in fetch_to_raw
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] fetch(context, image_href, path_tmp)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/virt/images.py", line 118, in fetch
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] IMAGE_API.download(context, image_href, dest_path=path)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/image/api.py", line 184, in download
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] dst_path=dest_path)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/image/glance.py", line 533, in download
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] _reraise_translated_image_exception(image_id)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/image/glance.py", line 1050, in _reraise_translated_image_exception
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] six.reraise(type(new_exc), new_exc, exc_trace)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/image/glance.py", line 531, in download
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] image_chunks = self._client.call(context, 2, 'data', image_id)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/opt/stack/nova/nova/image/glance.py", line 168, in call
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] result = getattr(controller, method)(*args, **kwargs)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/usr/local/lib/python2.7/dist-packages/glanceclient/v2/images.py", line 195, in data
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] resp, body = self.http_client.get(url)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/usr/local/lib/python2.7/dist-packages/glanceclient/common/http.py", line 287, in get
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] return self._request('GET', url, **kwargs)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/usr/local/lib/python2.7/dist-packages/glanceclient/common/http.py", line 279, in _request
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] resp, body_iter = self._handle_response(resp)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] File "/usr/local/lib/python2.7/dist-packages/glanceclient/common/http.py", line 107, in _handle_response
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] raise exc.from_response(resp, resp.content)
2017-02-08 11:04:24.929 24141 ERROR nova.compute.manager [instance: 6e44cafd-b330-4a10-8c77-eac60d58f20c] ImageNotFound: Image could not be found.

Due to: disk_image's image_id is set here:
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py#n3056
to instance.image_ref which is None, and it is been used in
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py#n3078
lead to
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py#n3164
and
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/utils.py#n456
in which try to fetch image with uuid of '' from glance and causing the above failure.

[Lee Yarwood (lyarwood)]

> we are saying that for using source=image dest=local/None(seems None is
> treated as local) we should also provide image ref, but the fact is that if do so,
> we got:

I don't think the docs are asking you to provide --image, tbh we could use some examples in the docs to illustrate this. Either way I can reproduce this with --image removed as above.

[Sean Dague (sdague)]

There are no currently open reviews on this bug, changing the status back to the previous state and unassigning. If there are active reviews related to this bug, please include links in comments.