[Bug 1182624] Re: Uncached instance builds fail with non-zero root disk sizes
David Wittman
1182624 at bugs.launchpad.net
Tue May 21 19:59:07 UTC 2013
** Description changed:
A recent change in the Folsom code has resulted in issues building new
instances with a non-zero root disk size. It is currently trying to
compare the flavor size to the size of the base image before the base
image is actually pulled down. As a result, builds fail with the
following error in nova-compute.log:
- 2013-05-21 17:44:18 ERROR nova.compute.manager [req-a1b0cf46-aad0-48e4-8474-ea350de678d5 5dbf5c9e5c4740638fa563a942475b12 180d2f50f1384c65b456da82ed90429d] [instance: 67b18b5c-755a-4484-a75a-9ce3629eb0c5] Build error: ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 503, in _run_instance\n injected_files, admin_password)\n', ' File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 756, in _spawn\n block_device_info)\n', '
- File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 117, in wrapped\n temp_level, payload)\n', '
- File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__\n self.gen.next()\n', '
- File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 92, in wrapped\n return f(*args, **kw)\n', '
- File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1091, in spawn\n admin_pass=admin_password)\n', '
- File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1357, in _create_image\n project_id=instance[\'project_id\'])\n', '
- File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 131, in cache\n *args, **kwargs)\n', '
- File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 181, in create_image\n if size and size < disk.get_disk_size(base):\n', '
- File "/usr/lib/python2.7/dist-packages/nova/virt/disk/api.py", line 115, in get_disk_size\n size = images.qemu_img_info(path)[\'virtual size\']\n', '
- File "/usr/lib/python2.7/dist-packages/nova/virt/images.py", line 50, in qemu_img_info\n \'qemu-img\', \'info\', path)\n', '
+ 2013-05-21 17:44:18 ERROR nova.compute.manager [req-a1b0cf46-aad0-48e4-8474-ea350de678d5 5dbf5c9e5c4740638fa563a942475b12 180d2f50f1384c65b456da82ed90429d] [instance: 67b18b5c-755a-4484-a75a-9ce3629eb0c5] Build error: ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 503, in _run_instance\n injected_files, admin_password)\n', ' File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 756, in _spawn\n block_device_info)\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 117, in wrapped\n temp_level, payload)\n', '
+ File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__\n self.gen.next()\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 92, in wrapped\n return f(*args, **kw)\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1091, in spawn\n admin_pass=admin_password)\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1357, in _create_image\n project_id=instance[\'project_id\'])\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 131, in cache\n *args, **kwargs)\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 181, in create_image\n if size and size < disk.get_disk_size(base):\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/virt/disk/api.py", line 115, in get_disk_size\n size = images.qemu_img_info(path)[\'virtual size\']\n', '
+ File "/usr/lib/python2.7/dist-packages/nova/virt/images.py", line 50, in qemu_img_info\n \'qemu-img\', \'info\', path)\n', '
File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 210, in execute\n cmd=\' \'.join(cmd))\n', 'ProcessExecutionError: Unexpected error while running command.\nCommand: env LC_ALL=C LANG=C qemu-img info /var/lib/nova/instances/_base/ef98e9c3ea74090467df43c56068756bae1b8a4e\nExit code: 1\nStdout: \'\'\nStderr: "qemu-img: Could not open \'/var/lib/nova/instances/_base/ef98e9c3ea74090467df43c56068756bae1b8a4e\': No such file or directory\\n"\n']
System Info:
# lsb_release -rd
Description: Ubuntu 12.04.2 LTS
Release: 12.04
# apt-cache policy nova-compute
nova-compute:
- Installed: 2012.2.3-0ubuntu2.1~cloud0
- Candidate: 2012.2.3-0ubuntu2.1~cloud0
- Version table:
- *** 2012.2.3-0ubuntu2.1~cloud0 0
- 500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ precise-proposed/folsom/main amd64 Packages
- 100 /var/lib/dpkg/status
- 2012.1.3+stable-20130423-e52e6912-0ubuntu1.1 0
- 500 http://mirror.rackspace.com/ubuntu/ precise-updates/main amd64 Packages
- 500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
- 2012.1-0ubuntu2 0
- 500 http://mirror.rackspace.com/ubuntu/ precise/main amd64 Packages
+ Installed: 2012.2.3-0ubuntu2.1~cloud0
+ Candidate: 2012.2.3-0ubuntu2.1~cloud0
+ Version table:
+ *** 2012.2.3-0ubuntu2.1~cloud0 0
+ 500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ precise-proposed/folsom/main amd64 Packages
+ 100 /var/lib/dpkg/status
+ 2012.1.3+stable-20130423-e52e6912-0ubuntu1.1 0
+ 500 http://mirror.rackspace.com/ubuntu/ precise-updates/main amd64 Packages
+ 500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
+ 2012.1-0ubuntu2 0
+ 500 http://mirror.rackspace.com/ubuntu/ precise/main amd64 Packages
+
+ This issue does NOT occur if the image being used is already cached in
+ the instances_path on the compute host.
Here is the commit where the bug was introduced:
https://github.com/openstack/nova/commit/6740c4141ea1152529b82cbf6e5b808eaba912e7
It appears to be a merge issue with Folsom, as the prepare_template line
appears above the conditional in Grizzly.
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https://bugs.launchpad.net/bugs/1182624
Title:
Uncached instance builds fail with non-zero root disk sizes
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