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Operating Systems Linux Red Hat Snapshot revert fails in my KVM setup Post 302923480 by kalpeer on Monday 3rd of November 2014 09:14:23 AM
Old 11-03-2014
Snapshot revert fails in my KVM setup

Hi All,

I am trying to revert a snapshot and I am getting the below error message in my KVM setup (RHEL6.5). Reverting to a snapshot is failing.

Quote:
#virsh snapshot-revert TestImg Deployed-Stage --force
error: An error occurred, but the cause is unknown
I used the below command to create the snapshot.
Quote:
virsh snapshot-create-as TestImg Deployed-Stage --disk-only --atomic --no-metadata
Below is my snapshot list:

virsh snapshot-list TestImg –tree

Quote:
Deployed-Stage
|
+- Snapshot1
|
+- Snapshot2
Snapshot Info:
Quote:
virsh snapshot-info TestImg --snapshotname Deployed-Stage
Name: Deployed-Stage
Domain: TestImg
Current: no
State: shutoff
Location: external
Parent: -
Children: 1
Descendants: 2
Metadata: yes
Virsh version:
Quote:
virsh version
Compiled against library: libvirt 0.10.2
Using library: libvirt 0.10.2
Using API: QEMU 0.10.2
Running hypervisor: QEMU 0.12.1
libvirtd.log has below warning message
Quote:
2014-11-03 14:14:17.261+0000: 8025: warning : qemuDomainSnapshotForEachQcow2Raw:1723 : skipping snapshot action on vda
Please help me on this.

Thanks,
Kalpeer

Last edited by kalpeer; 11-03-2014 at 10:16 AM.. Reason: Update the text
 

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GIT-REVERT(1)							    Git Manual							     GIT-REVERT(1)

NAME
git-revert - Revert some existing commits SYNOPSIS
git revert [--edit | --no-edit] [-n] [-m parent-number] [-s] <commit>... git revert --continue git revert --quit git revert --abort DESCRIPTION
Given one or more existing commits, revert the changes that the related patches introduce, and record some new commits that record them. This requires your working tree to be clean (no modifications from the HEAD commit). Note: git revert is used to record some new commits to reverse the effect of some earlier commits (often only a faulty one). If you want to throw away all uncommitted changes in your working directory, you should see git-reset(1), particularly the --hard option. If you want to extract specific files as they were in another commit, you should see git-checkout(1), specifically the git checkout <commit> -- <filename> syntax. Take care with these alternatives as both will discard uncommitted changes in your working directory. OPTIONS
<commit>... Commits to revert. For a more complete list of ways to spell commit names, see gitrevisions(7). Sets of commits can also be given but no traversal is done by default, see git-rev-list(1) and its --no-walk option. -e, --edit With this option, git revert will let you edit the commit message prior to committing the revert. This is the default if you run the command from a terminal. -m parent-number, --mainline parent-number Usually you cannot revert a merge because you do not know which side of the merge should be considered the mainline. This option specifies the parent number (starting from 1) of the mainline and allows revert to reverse the change relative to the specified parent. Reverting a merge commit declares that you will never want the tree changes brought in by the merge. As a result, later merges will only bring in tree changes introduced by commits that are not ancestors of the previously reverted merge. This may or may not be what you want. See the revert-a-faulty-merge How-To[1] for more details. --no-edit With this option, git revert will not start the commit message editor. -n, --no-commit Usually the command automatically creates some commits with commit log messages stating which commits were reverted. This flag applies the changes necessary to revert the named commits to your working tree and the index, but does not make the commits. In addition, when this option is used, your index does not have to match the HEAD commit. The revert is done against the beginning state of your index. This is useful when reverting more than one commits' effect to your index in a row. -s, --signoff Add Signed-off-by line at the end of the commit message. --strategy=<strategy> Use the given merge strategy. Should only be used once. See the MERGE STRATEGIES section in git-merge(1) for details. -X<option>, --strategy-option=<option> Pass the merge strategy-specific option through to the merge strategy. See git-merge(1) for details. SEQUENCER SUBCOMMANDS
--continue Continue the operation in progress using the information in .git/sequencer. Can be used to continue after resolving conflicts in a failed cherry-pick or revert. --quit Forget about the current operation in progress. Can be used to clear the sequencer state after a failed cherry-pick or revert. --abort Cancel the operation and return to the pre-sequence state. EXAMPLES
git revert HEAD~3 Revert the changes specified by the fourth last commit in HEAD and create a new commit with the reverted changes. git revert -n master~5..master~2 Revert the changes done by commits from the fifth last commit in master (included) to the third last commit in master (included), but do not create any commit with the reverted changes. The revert only modifies the working tree and the index. SEE ALSO
git-cherry-pick(1) GIT
Part of the git(1) suite NOTES
1. revert-a-faulty-merge How-To file:///usr/share/doc/git/html/howto/revert-a-faulty-merge.txt Git 1.7.10.4 11/24/2012 GIT-REVERT(1)
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