[Openstack] Error while creating cinder volume
Avishay Traeger
AVISHAY at il.ibm.com
Mon Jan 21 05:52:05 UTC 2013
Vibhu,
What Cinder did here is:
1) Downloaded the qcow2 file to /tmp
2) Tried to convert the qcow2 file to raw (reading from /tmp and writing to
the logical volume)
The problem is that your image takes more space with raw format, and that
is why it is failing. Basically, qcow2 does not allocate space for areas
of the image file that have not yet been written, while raw allocates
everything ahead of time. To know the full size, run 'qemu-img info' on
the qcow2 file.
Thanks,
Avishay
From: "Bontala, Vibhuvardhan" <vibhuvardhan.bontala at emc.com>
To: Vishvananda Ishaya <vishvananda at gmail.com>,
Cc: openstack mail list <openstack at lists.launchpad.net>
Date: 01/17/2013 07:53 AM
Subject: Re: [Openstack] Error while creating cinder volume
Sent by: openstack-bounces+avishay=il.ibm.com at lists.launchpad.net
Vish,
I didn’t quite understand the latter part. The image size is 1.8G. In the
output below, I attempted to create a bootable volume of size 2G. If that
looks smaller for a virtual disk, I tried with 4G and failed with the same
error. Could you suggest me the minimum size of the virtual disk for what I
am trying here?
Thanks
Vibhu
From: Vishvananda Ishaya [mailto:vishvananda at gmail.com]
Sent: Thursday, January 17, 2013 12:16 AM
To: Bontala, Vibhuvardhan
Cc: openstack mail list
Subject: Re: [Openstack] Error while creating cinder volume
in folsom, cinder didn't automatically convert images to raw when creating
a volume. This is necessary because a qcow written directly to a volume
will not boot properly. This means you need to create a volume that is the
size of the virtual disk.
Vish
On Jan 16, 2013, at 8:39 PM, "Bontala, Vibhuvardhan" <
vibhuvardhan.bontala at emc.com> wrote:
Hi,
I have a Glance image that I am using to create a Cinder volume using the
native iSCSI driver. It had always worked in Folsom. But when I am trying
for the first time on the Grizzly-2 code base, I am seeing an error. I have
sufficient space in my root partition.
The command I used to create the Cinder volume is below.
cinder create 2 --image-id cca54f84-f0ff-4e8e-a9e9-671f4f1b5dc5
--display-name Vol1
2013-01-16 16:47:24.547 DEBUG cinder.utils
[req-97f721cb-a87a-40f6-82ad-b3523b655800 4b84a5d2b68e4d3aa640b0888bbc606e
7525b3ad32a043b3b9ad2dded6c4a8e0] Running cmd (subprocess):
sudo /usr/local/bin/cinder-rootwrap /etc/cinder/rootwrap.conf qemu-img
convert -O
raw /tmp/tmplZsSWZ /dev/mapper/stack--volumes-volume--730f75cc--24da--4838--9308--d56954eb4974
from (pid=27138) execute /opt/stack/cinder/cinder/utils.py:162
2013-01-16 16:47:24.661 DEBUG cinder.utils
[req-97f721cb-a87a-40f6-82ad-b3523b655800 4b84a5d2b68e4d3aa640b0888bbc606e
7525b3ad32a043b3b9ad2dded6c4a8e0] Result was 1 from (pid=27138)
execute /opt/stack/cinder/cinder/utils.py:179
2013-01-16 16:47:25.104 ERROR cinder.openstack.common.rpc.amqp [-]
Exception during message handling
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp Traceback
(most recent call last):
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/openstack/common/rpc/amqp.py", line 276, in
_process_data
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp rval =
self.proxy.dispatch(ctxt, version, method, **args)
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/openstack/common/rpc/dispatcher.py", line 145, in
dispatch
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp return
getattr(proxyobj, method)(ctxt, **kwargs)
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/volume/manager.py", line 236, in create_volume
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
self._copy_image_to_volume(context, volume_ref, image_id)
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/volume/manager.py", line 420, in
_copy_image_to_volume
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
self.db.volume_update(context, volume_id, {'status': 'error'})
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/usr/lib/python2.7/contextlib.py", line 24, in __exit__
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
self.gen.next()
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/volume/manager.py", line 412, in
_copy_image_to_volume
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
image_id)
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/volume/driver.py", line 676, in
copy_image_to_volume
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
self.local_path(volume))
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/image/image_utils.py", line 233, in fetch_to_raw
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
convert_image(tmp, dest, 'raw')
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/image/image_utils.py", line 191, in convert_image
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
utils.execute(*cmd, run_as_root=True)
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp File
"/opt/stack/cinder/cinder/utils.py", line 186, in execute
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp cmd='
'.join(cmd))
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp
ProcessExecutionError: Unexpected error while running command.
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp Command:
sudo /usr/local/bin/cinder-rootwrap /etc/cinder/rootwrap.conf qemu-img
convert -O
raw /tmp/tmplZsSWZ /dev/mapper/stack--volumes-volume--730f75cc--24da--4838--9308--d56954eb4974
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp Exit code: 1
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp Stdout: ''
2013-01-16 16:47:25.104 TRACE cinder.openstack.common.rpc.amqp Stderr:
'qemu-img: /dev/mapper/stack--volumes-volume--730f75cc--24da--4838--9308--d56954eb4974:
error while converting raw: No space left on device\n'
I have sufficient space on the local hard disk. Below is the output for a
bunch of useful commands to diagnose this issue.
stack at esg-dell-c4-s08:~$ df -H
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/esg--dell--c4--s08-root 39G 17G 20G 47% /
udev 17G 4.1k 17G 1% /dev
tmpfs 6.8G 361k 6.8G 1% /run
none 5.3M 0 5.3M 0% /run/lock
none 17G 0 17G 0% /run/shm
cgroup 17G 0 17G 0% /sys/fs/cgroup
/dev/sdb1 239M 76M 151M 34% /boot
stack at esg-dell-c4-s08:~$ sudo vgs
VG #PV #LV #SN Attr VSize VFree
esg-dell-c4-s08 1 2 0 wz--n- 68.12g 48.00m
stack-volumes 1 1 0 wz--n- 10.00g 8.00g
stack at esg-dell-c4-s08:~$ sudo lvs
LV VG Attr LSize
Origin Snap% Move Log Copy% Convert
root esg-dell-c4-s08 -wi-ao 36.08g
swap_1 esg-dell-c4-s08 -wi-ao 32.00g
volume-195155d5-36cc-42bd-b7ef-67d725787147 stack-volumes -wi-ao 2.00g
stack at esg-dell-c4-s08:~$ ls -alh /opt/stack/data/
total 2.1G
drwxr-xr-x 6 stack root 4.0K Jan 11 16:49 .
drwxr-xr-x 18 stack root 4.0K Jan 11 17:05 ..
drwxrwxr-x 3 stack stack 4.0K Jan 11 16:49 cinder
drwxrwxr-x 4 stack stack 4.0K Jan 11 16:48 glance
drwxrwxr-x 7 stack stack 4.0K Jan 11 16:51 nova
drwxr-xr-x 4 stack stack 4.0K Jan 16 17:04 quantum
-rw-rw-r-- 1 stack stack 10G Jan 16 22:59 stack-volumes-backing-file
The image I am using is a 1.8GB qcow2 image. As I said, I never had an
issue with the same image using Folsom code.
Has anyone been aware of this issue and have a solution?
Thanks
Vibhu Bontala
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