** Changed in: nova/ocata
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1672792
Title:
Nova with ceph backend instance creation fails with: the name of the
pool must be a string
Status in OpenStack Compute (nova):
Fix Released
Status in OpenStack Compute (nova) ocata series:
Fix Released
Bug description:
Situation: Ocata (RDO), Nova configured with ceph backend as follows:
[libvirt]
images_type = rbd
images_rbd_pool = nova
images_rbd_ceph_conf = /etc/ceph/ceph.conf
rbd_user = nova_cinder
rbd_secret_uuid = <uuid>
When launching an image backed instance (so not backed by a cinder
volume), instance creation fails with: 'the name of the pool must be a
string'.
After some digging I found that in: /usr/lib/python2.7/site-
packages/nova/virt/libvirt/storage/rbd_utils.py in _connect_to_rados
in the call ioctx = client.open_ioctx(pool_to_open)
pool_to_open is passed as unicode and in /usr/lib/python2.7/site-
packages/rados.py a check is done which fails if ioctx_name is not a
string.
Easy fix seems to be to do a cast to string in _connect_to_rados:
ioctx = client.open_ioctx(str(pool_to_open))
This fixes the issue for me.
Creating an instance with a ceph backed volume is not affected by this
issue, this works fine.
Versions:
openstack-nova-compute-15.0.0-1.el7.noarch
python-nova-15.0.0-1.el7.noarch
python-rados-0.94.10-0.el7.x86_64
Stacktrace:
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager
[req-90b9607f-01e9-4586-a083-c4f2051294ff - - - - -] [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] Instance failed to spawn
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] Traceback (most recent call last):
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2125, in
_build_resources
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] yield resources
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 1930, in
_build_and_run_instance
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] block_device_info=block_device_info)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 2676, in
spawn
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] block_device_info=block_device_info)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3081, in
_create_image
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] fallback_from_host)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3197, in
_create_and_inject_local_root
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] instance, size, fallback_from_host)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 6758, in
_try_fetch_image_cache
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] size=size)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/imagebackend.py", line 227,
in cache
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] *args, **kwargs)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/imagebackend.py", line 858,
in create_image
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] prepare_template(target=base, *args,
**kwargs)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/oslo_concurrency/lockutils.py", line 271, in
inner
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] return f(*args, **kwargs)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/imagebackend.py", line 223,
in fetch_func_sync
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] fetch_func(target=target, *args,
**kwargs)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3189, in
clone_fallback_to_fetch
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] backend.clone(context,
disk_images['image_id'])
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/imagebackend.py", line 892,
in clone
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] if self.driver.is_cloneable(location,
image_meta):
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line
235, in is_cloneable
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] return self.exists(image, pool=pool,
snapshot=snapshot)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line
309, in exists
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] read_only=True):
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line
70, in __init__
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] client, ioctx =
driver._connect_to_rados(pool)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line
149, in _connect_to_rados
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] ioctx =
client.open_ioctx(pool_to_open)
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] File
"/usr/lib/python2.7/site-packages/rados.py", line 662, in open_ioctx
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] raise TypeError('the name of the pool
must be a string')
│
2017-03-14 15:48:33.480 6668 ERROR nova.compute.manager [instance:
87145bc6-61fc-4068-a135-fccfd8aed359] TypeError: the name of the pool must be a
string
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