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 dont think qemu-img supports outputting to stdout, so this will have to be a two-step process.
From: ceph-users [mailto:[email protected]] On Behalf Of NEVEU Stephane Sent: Friday, July 25, 2014 8:57 AM To: NEVEU Stephane; [email protected] Subject: Re: [ceph-users] RBD import format 1 & 2 I finally reconverted my only format 1 image into format 2 so now everything is in format 2, but Im still confused, my vm disks are still readonly (Ive 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:[email protected]] De la part de NEVEU Stephane Envoyé : vendredi 25 juillet 2014 13:45 À : [email protected] Objet : [ceph-users] RBD import format 1 & 2 Hi all, One quick question about image format 1 & 2 : Ive 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 wont 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. Im 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.
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