Bootable volume creation failed with glance image of 'ISO' format

[Vivek Soni]

Steps to reproduce :-
------------------------
1)Created glance image 'my_ISO' with 'ubuntu-16.04.2-server-amd64.iso'

stack@bld7064:/opt/stack/cinder$ glance image-list
+--------------------------------------+--------------------------+
| ID | Name |
+--------------------------------------+--------------------------+
| da3a58bf-c540-4a58-aa58-2fdde9667a58 | cirros-0.3.5-x86_64-disk |
| c600081c-6544-45fe-9851-f601dc8946bd | my_ISO |
+--------------------------------------+--------------------------+

2)Create bootable volume from that glance image

stack@bld7064:/opt/stack/cinder$ cinder create --image-id c600081c-6544-45fe-9851-f601dc8946bd --name volume1 --volume-type lvmdriver-1 10

stack@bld7064:/opt/stack/cinder$ cinder list
+--------------------------------------+--------+---------+------+-------------+----------+-------------+
| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+--------+---------+------+-------------+----------+-------------+
| 7d133b6b-e0d5-424e-a24d-42f07897787b | error | volume1 | 10 | lvmdriver-1 | false | |
+--------------------------------------+--------+---------+------+-------------+----------+-------------+

Error Log :-
-------------------

Command: sudo cinder-rootwrap /etc/cinder/rootwrap.conf qemu-img convert -t none -f iso -O raw /opt/stack/data/cinder/conversion/tmpEIQ4Uvworker2@lvmdriver-1 /dev/mapper/stack--volumes--lvmdriver--1-volume--7d133b6b--e0d5--424e--a24d--42f07897787b
Exit code: 1
Stdout: u''
Stderr: u"qemu-img: Could not open '/opt/stack/data/cinder/conversion/tmpEIQ4Uvworker2@lvmdriver-1': Unknown driver 'iso'\n"
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00mTraceback (most recent call last):
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/opt/stack/cinder/cinder/volume/flows/manager/create_volume.py", line 550, in _copy_image_to_volume
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m context, volume, image_service, image_id)
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/opt/stack/cinder/cinder/volume/drivers/lvm.py", line 487, in copy_image_to_volume
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m size=volume['size'])
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/opt/stack/cinder/cinder/image/image_utils.py", line 331, in fetch_to_raw
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m run_as_root=run_as_root)
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/opt/stack/cinder/cinder/image/image_utils.py", line 421, in fetch_to_volume_format
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m run_as_root=run_as_root)
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/opt/stack/cinder/cinder/image/image_utils.py", line 198, in convert_image
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m run_as_root=run_as_root)
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/opt/stack/cinder/cinder/image/image_utils.py", line 158, in _convert_image
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m utils.execute(*cmd, run_as_root=run_as_root)
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/opt/stack/cinder/cinder/utils.py", line 123, in execute
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m return processutils.execute(*cmd, **kwargs)
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m File "/usr/local/lib/python2.7/dist-packages/oslo_concurrency/processutils.py", line 400, in execute
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00m cmd=sanitized_cmd)
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00mProcessExecutionError: Unexpected error while running command.
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00mCommand: sudo cinder-rootwrap /etc/cinder/rootwrap.conf qemu-img convert -t none -f iso -O raw /opt/stack/data/cinder/conversion/tmpEIQ4Uvworker2@lvmdriver-1 /dev/mapper/stack--volumes--lvmdriver--1-volume--7d133b6b--e0d5--424e--a24d--42f07897787b
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00mExit code: 1
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00mStdout: u''
^[[01;31m2017-07-20 12:25:08.759 TRACE cinder.volume.flows.manager.create_volume ^[[01;35m^[[00mStderr: u"qemu-img: Could not open '/opt/stack/data/cinder/conversion/tmpEIQ4Uvworker2@lvmdriver-1': Unknown driver 'iso'\n"

[Eric Harney (eharney)]

sudo cinder-rootwrap /etc/cinder/rootwrap.conf qemu-img convert -t none -f iso -O raw /opt/stack/data/cinder/conversion/tmpEIQ4Uvworker2@lvmdriver-1 /dev/mapper/stack--volumes--lvmdriver--1-volume--7d133b6b--e0d5--424e--a24d--42f07897787b

"qemu-img: Could not open '/opt/stack/data/cinder/conversion/tmpEIQ4Uvworker2@lvmdriver-1': Unknown driver 'iso'\n"

This error is because qemu-img does not have support for performing "convert" on the iso format.

I think what's supposed to happen here is that the iso is just written to the volume without any conversion, leaving iso-formatted data on the new volume.

[Eric Harney (eharney)]

This was likely introduced by my change here:

https://review.openstack.org/#/c/453341/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/487584

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/487584
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=a27465512c74678c498680c844e7e9d091785ca0
Submitter: Jenkins
Branch: master

commit a27465512c74678c498680c844e7e9d091785ca0
Author: Eric Harney <email address hidden>
Date: Wed Jul 26 16:13:58 2017 -0400

    Fix image download to volume for iso images

    After changes made in
      b1ebfa4f qemu_img_info: Don't autodetect source format

    ISO image downloads from Glance fail because Cinder
    calls "qemu-img convert -f iso" and "iso" is not a supported
    image format in qemu-img. These should be treated as raw
    images during the download process.

    This would also be true for any other image formats
    supported by Glance that qemu-img cannot convert, but that
    list does not seem to include anything that we previously
    supported with Cinder downloads. (aki/ari, ovf/ova, docker)

    Change-Id: Ifa427b6d9894febd80142f7fb9e2c5ba8bc72e4c
    Closes-Bug: #1705407
    Related-Bug: #1693926

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/cinder 11.0.0.0rc1 release candidate.