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https://issues.apache.org/jira/browse/CLOUDSTACK-210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469863#comment-13469863
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edison su commented on CLOUDSTACK-210:
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Marcus, do you enable snapshot for clvm? Maybe we can say, snapshot is only
supported, if you are using clvm. The main problem with qcow2 internal snapshot
is that, by default, it will halt the VM for few minutes. I don't think that's
worthwhile to take snapshot if your vm will be no response for few minutes.
> KVM Snapshot fails on RHEL 6.3 because of qemu-img help text differences
> ------------------------------------------------------------------------
>
> Key: CLOUDSTACK-210
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-210
> Project: CloudStack
> Issue Type: Bug
> Components: KVM
> Affects Versions: pre-4.0.0
> Reporter: Prasanna Santhanam
> Assignee: edison su
> Fix For: 4.1.0
>
>
> From: http://markmail.org/thread/fndid26baau3sxdl
> On Wed, Sep 26, 2012 at 08:23:31AM -0400, Sowmya Krishnan wrote:
> > Here's the output on Ubuntu:
> > qemu-img --help|grep convert |grep snapshot
> > convert [-c] [-p] [-f fmt] [-t cache] [-O output_fmt] [-o options] [-s
> > snapshot_name] [-S sparse_size] filename [filename2 [...]] output_filename
> >
> > which is similar to RHEL6.2:
> > qemu-img --help|grep convert |grep snapshot
> > convert [-c] [-p] [-f fmt] [-t cache] [-O output_fmt] [-o options] [-s
> > snapshot_name] [-S sparse_size] filename [filename2 [...]] output_filename
> >
> > Returns null on RHEL6.3:
> > [root@rhel63 ~]# qemu-img --help|grep convert |grep snapshot
> > [root@rhel63 ~]#
> Thanks, Could you post a bug?
> The issue seems to be in
>
> plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
> 4289 private boolean isSnapshotSupported() {
> 4290 String result = executeBashScript("qemu-img --help|grep -E
> convert|snapshot");
> 4291 if (result != null) {
> 4292 return false;
> 4293 } else {
> 4294 return true;
> 4295 }
> 4296 }
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