I had tried on rhel 6.3, Increase the volume size is happening without error. But while decreasing the size its showing the error format not supported.
qemu-img resize myvol.qcow2 +50G Image resized. [root@kvm57 ~]# qemu-img resize myvol.qcow2 40G qemu-img: This image format does not support resize Thanks Rajesh Battala > -----Original Message----- > From: Wido den Hollander [mailto:w...@widodh.nl] > Sent: Thursday, February 28, 2013 3:34 PM > To: cloudstack-dev@incubator.apache.org > Subject: Re: [ACS41]Unable to shrink volumes of type QCOW2 > > > > On 02/28/2013 10:53 AM, Rajesh Battala wrote: > > When I was going through the source and resizevolume.sh, In the > > libvirtcomputing resources, we are restricting to resize only for "raw" > > disks. > > But in the resizevolume.sh which will actually do the resizing of the > > disks, this > file has the function resizeqcow2() which is actually has the capability to > resize > qcow2 image. > > > > From this source http://linux.die.net/man/1/qemu-img > > qemu-img resize supports qcow2 image format also. Am not sure why we are > restricting not to convert qcow2 images. > > Indeed, resizevolume.sh allows QCOW2 files to be shrunk. > > BUT, I just tried it on my desktop and that fails: > > wido@wido-desktop:~$ qemu-img create -f qcow2 volume.qcow2 50G > Formatting 'volume.qcow2', fmt=qcow2 size=53687091200 encryption=off > cluster_size=65536 > wido@wido-desktop:~$ qemu-img resize volume.qcow2 -20G > qemu-img: This image format does not support resize wido@wido-desktop:~$ > > On my desktop at the office it works, but that is running a manually compiled > Qemu version. > > So the stock Ubuntu 12.04 Qemu version does not support shrinking QCOW2 > files. Not sure about CentOS/RHEL 6.3. > > Wido > > > > > > > Thanks > > Rajesh Battala > > > > > >> -----Original Message----- > >> From: Wido den Hollander [mailto:w...@widodh.nl] > >> Sent: Thursday, February 28, 2013 3:05 PM > >> To: cloudstack-dev@incubator.apache.org > >> Subject: Re: [ACS41]Unable to shrink volumes of type QCOW2 > >> > >> > >> > >> On 02/28/2013 07:39 AM, Marcus Sorensen wrote: > >>> On Wed, Feb 27, 2013 at 6:58 AM, Wido den Hollander <w...@widodh.nl> > >> wrote: > >>>> On 02/27/2013 12:45 PM, Sailaja Mada wrote: > >>>>> > >>>>> Hi, > >>>>> > >>>>> Out of my curiosity , I tried to resize the volume with shrink > >>>>> option set to true . It failed to resize volume from 20 GB to 10 > >>>>> GB . This is with KVM > >>>>> 6.3 hypervisor. Do we have support this feature with KVM ? > >>>>> > >>>>> 2013-02-27 17:01:55,052 DEBUG [cloud.api.ApiServlet] > >>>>> (catalina-exec-1:null) ===END=== 10.144.7.13 -- GET > >>>>> command=resizeVolume&id=ff94b87c-973c-4698-9fd2- > >> 4a1375f5a7c0&shrinko > >>>>> k=true&diskofferingid=8c61068f-f997-48f5-a8ee-dfe8fd3571f2&size=10 > >>>>> &r > >>>>> > >> > esponse=json&sessionkey=Ijl3uimE7kcZYn0P%2FK4AEvh%2B3fw%3D&_=136196 > >> 4 > >>>>> 737075 > >>>>> 2013-02-27 17:01:55,054 DEBUG [cloud.async.AsyncJobManagerImpl] > >>>>> (Job-Executor-66:job-128) Executing > >>>>> org.apache.cloudstack.api.command.user.volume.ResizeVolumeCmd for > >>>>> job-128 > >>>>> 2013-02-27 17:01:55,078 DEBUG [agent.transport.Request] > >>>>> (Job-Executor-66:job-128) Seq 1-648544436: Sending { Cmd , MgmtId: > >>>>> 55487956346259, via: 1, Ver: v1, Flags: 100011, > >>>>> [{"storage.ResizeVolumeCommand":{"path":"d6a5ce3c-ca40-426d-b0bd- > >> 703 > >>>>> 567eda58f","pool":{"id":200,"uuid":"17700ab0-df5a-3047-a631-588d93 > >>>>> dd > >>>>> 749a","host":"10.102.192.100","path":"/cpg_vol/sailaja/asf41kvmps"," > >>>>> port":2049,"type":"NetworkFilesystem"},"vmInstance":"none","newSize" > >>>>> :10737418240,"currentSize":21474836480,"shrinkOk":true,"wait":0}}] > >>>>> } > >>>>> 2013-02-27 17:01:55,192 DEBUG [agent.transport.Request] > >>>>> (AgentManager-Handler-10:null) Seq 1-648544436: Processing: { Ans: > >>>>> , > >>>>> MgmtId: 55487956346259, via: 1, Ver: v1, Flags: 10, > >>>>> [{"storage.ResizeVolumeAnswer":{"newSize":0,"result":false,"details" > >>>>> :"Unable to shrink volumes of type QCOW2","wait":0}}] } > >>>>> 2013-02-27 17:01:55,192 DEBUG [agent.transport.Request] > >>>>> (Job-Executor-66:job-128) Seq 1-648544436: Received: { Ans: , MgmtId: > >>>>> 55487956346259, via: 1, Ver: v1, Flags: 10, { ResizeVolumeAnswer } > >>>>> } > >>>>> 2013-02-27 17:01:55,192 DEBUG [cloud.storage.StorageManagerImpl] > >>>>> (Job-Executor-66:job-128) Resize: returned 'Unable to shrink > >>>>> volumes of type QCOW2' > >>>>> 2013-02-27 17:01:55,201 DEBUG [cloud.async.AsyncJobManagerImpl] > >>>>> (Job-Executor-66:job-128) Complete async job-128, jobStatus: 2, > >> resultCode: > >>>>> 530, result: Error Code: 530 Error text: Failed to resize volume > >>>>> 2013-02-27 17:01:58,073 DEBUG [cloud.api.ApiServlet] > >>>>> (catalina-exec-17:null) ===START=== 10.144.7.13 -- GET > >>>>> command=queryAsyncJobResult&jobId=68fdb060-343c-4a64-8ccd- > >> ce738da07a > >>>>> > >> > 9b&response=json&sessionkey=Ijl3uimE7kcZYn0P%2FK4AEvh%2B3fw%3D&_=13 > >> 6 > >>>>> 1964740184 > >>>>> 2013-02-27 17:01:58,081 DEBUG [cloud.async.AsyncJobManagerImpl] > >>>>> (catalina-exec-17:null) Async job-128 completed > >>>>> 2013-02-27 17:01:58,085 DEBUG [cloud.api.ApiServlet] > >>>>> (catalina-exec-17:null) ===END=== 10.144.7.13 -- GET > >>>>> command=queryAsyncJobResult&jobId=68fdb060-343c-4a64-8ccd- > >> ce738da07a > >>>>> > >> > 9b&response=json&sessionkey=Ijl3uimE7kcZYn0P%2FK4AEvh%2B3fw%3D&_=13 > >> 6 > >>>>> 1964740184 > >>>>> > >>>>> > >>>> > >>>> Checking the code I found this in LibvirtComputingResource: > >>>> > >>>> boolean shrinkOk = cmd.getShrinkOk(); > >>>> > >>>> } else if (type.equals("QCOW2") && shrinkOk) { > >>>> return new ResizeVolumeAnswer(cmd, false, "Unable to shrink > >>>> volumes of type " + type); } > >>>> > >>>> Seems like a logical mistake? Shouldn't that be !shrinkOk? > >>>> > >>> > >>> Not a logical mistake. It's saying if you are trying to shrink a > >>> qcow2 image, it's not supported. > >>> > >> > >> Heh? QCOW2 does support shrinking? So why isn't it allowed then? > >> > >> Wido > >> > >>>> Wido > >>>> > >>>>> Thanks, > >>>>> Sailaja.M > >>>>> > >>>> > > [] > >
