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Bug 1436245 - [RFE] Add support for taking external snapshots of PFLASH nvram image
Summary: [RFE] Add support for taking external snapshots of PFLASH nvram image
Keywords:
Status: ASSIGNED
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt
Version: 7.3
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Peter Krempa
QA Contact: Meina Li
URL:
Whiteboard:
Depends On: 760547 1624009
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-03-27 13:45 UTC by Peter Krempa
Modified: 2019-03-12 12:51 UTC (History)
11 users (show)

Fixed In Version:
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Description Peter Krempa 2017-03-27 13:45:49 UTC
Description of problem:
Currently it's not possible to snaphsot the <nvram> backing image while taking an external snapshots. Add the support so that all files are properly versioned.

Comment 1 Xuesong Zhang 2017-03-29 08:16:57 UTC
hi, Peter,

From the libvirt.org[1], <mvram> is one specific device for PPC arch. So, I'd like to update the arch of this BZ from "Unspecified" to "ppc64le" for better tracking. Is it ok for you? Please correct me if any of my thoughts is wrong.

[1] nvram device: http://libvirt.org/formatdomain.html#elementsNVRAM

Comment 2 Peter Krempa 2017-03-29 08:23:24 UTC
No, <nvram> is also used for OVMF, which maps to a second pflash drive. So it certainly  is not ppc64 relevant at all. The ppc64 nvram probably won't be snapshottable, but I did not investiagte further.

Comment 3 Xuesong Zhang 2017-03-29 10:03:31 UTC
(In reply to Peter Krempa from comment #2)
> No, <nvram> is also used for OVMF, which maps to a second pflash drive. So
> it certainly  is not ppc64 relevant at all. The ppc64 nvram probably won't
> be snapshottable, but I did not investiagte further.

OK, it seesm the <nvram> in this BZ is the following settings in <os>, not the specific device for PPC.

<os>
  ......
  <nvram template='/usr/share/OVMF/OVMF_VARS.fd'>/var/lib/libvirt/nvram/guest_VARS.fd</nvram>
  ......
</os>

Comment 6 Jaroslav Suchanek 2018-04-12 07:08:37 UTC
Comment 5 should include answers from comment 4.


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