When you run qemu-img you are essentially converting the qcow2 image to the appropriate raw format during the conversion and import process to the cluster. When you use rbd import you are not doing a conversion, so the image is being imported AS IS (you can validate this by looking at the size of the image after importing). In order to get to format 2 initially you may need to convert the qcow2 to raw first, then import. Unfortunately I don?t think qemu-img supports outputting to stdout, so this will have to be a two-step process. From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of NEVEU Stephane Sent: Friday, July 25, 2014 8:57 AM To: NEVEU Stephane; ceph-users at lists.ceph.com Subject: Re: RBD import format 1 & 2 I finally reconverted my only ?format 1? image into format 2 so now everything is in format 2, but I?m still confused, my vm disks are still readonly (I?ve tried different images centos 6.5 with kernel 2.6.32 and ubuntu with 3.13), do I have to modprobe rbd on the host ? De : ceph-users [mailto:ceph-users-bounces at lists.ceph.com] De la part de NEVEU Stephane Envoy? : vendredi 25 juillet 2014 13:45 ? : ceph-users at lists.ceph.com Objet : [ceph-users] RBD import format 1 & 2 Hi all, One quick question about image format 1 & 2 : I?ve got a img.qcow2 and I want to convert it : The first solution is qemu-img convert ?f qcow2 ?O rbd img.qcow2 rbd:/mypool/myimage As far as I understood It will converted into format 1 which is the default one so I won?t be able to clone my image. Second solution is to import it directly into format 2 : Rbd import ?image-format 2 img.qcow2 mypool/myimage But in this case, when I start my VM, my vm / filesystem turns readonly with many buffer IO error on dm-0. I?m running Ubuntu 14.04 for both kvm host and VMs so kernel version is 3.13.0-30 Any idea ? Thx NOTICE: Protect the information in this message in accordance with the company's security policies. If you received this message in error, immediately notify the sender and destroy all copies. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140725/e507a9bb/attachment.htm>
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