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Bug 607328 - RFE: support storage volume backing files
RFE: support storage volume backing files
Product: Virtualization Tools
Classification: Community
Component: virt-manager (Show other bugs)
All Linux
low Severity medium
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Assigned To: Cole Robinson
Depends On:
  Show dependency treegraph
Reported: 2010-06-23 16:09 EDT by Eric Blake
Modified: 2013-09-29 10:54 EDT (History)
8 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2013-09-29 10:54:42 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Eric Blake 2010-06-23 16:09:35 EDT
Description of problem:
I tried to use virt-manager as a GUI front-end to creating a qcow2 file backed by an existing raw disk image.  However, it appears the GUI is only willing to create a non-chained qcow2 image.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. start virt-manager
2. under Edit,Host Details, select the Storage tab
3. Click New Volume
4. Change format to qcow2
5. Try to specify a backing file

Actual results:
No gui way to expose the <backingStore> xml element of <volume>

Expected results:
Ability to create a qcow2 file that uses another file as backing store (and optionally specify the expected format of that backing file) via the gui, since it would be a lot easier than writing the xml by hand and passing it through 'virsh create' on the command line

Additional info:
See also the recent libvirt patches to add 'vol-create-as --backing-vol xyz --backing-vol-format raw ...', which will make this task easier on the command line with virsh 0.8.2:
Comment 1 Bug Zapper 2011-06-01 11:46:00 EDT
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Approximately 30 (thirty) days from now Fedora will stop maintaining
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Comment 2 Cole Robinson 2011-06-10 13:26:01 EDT
Still relevant, moving to rawhide
Comment 3 Cole Robinson 2012-01-18 11:53:08 EST
Moving to upstream tracker
Comment 4 Cole Robinson 2013-09-29 10:54:42 EDT
Upstream now, create vol wizard now has UI for specifying backing store

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