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     }

The help text differs between ubuntu and rhel:
http://manpages.ubuntu.com/manpages/natty/man1/qemu-img.1.html

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/sect-Virtualization-Tips_and_tricks-Using_qemu_img.html

Should we depend on that?

-- 
Prasanna.,



> 
> 
> -----Original Message-----
> From: Prasanna Santhanam [mailto:prasanna.santha...@citrix.com] 
> Sent: Wednesday, September 26, 2012 5:31 PM
> To: cloudstack-dev@incubator.apache.org
> Subject: Re: [ASF40] [QA] Issue with volume Snapshot on KVM
> 
> Output of :
> 
> $ qemu-img --help|grep convert |grep snapshot
> 
> on the kvm hosts : ubuntu and rhel?
> 

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