What I just did to successfully "boot from a volume": 1- Create a KVM Virtual Machine on top of a LVM Logical Volume of 2.5G as its HD (disk type block - /dev/volgrp0/vmname-disk0);
2- Install your favorite OS; 3- shutdown it; 4- make a image of it: dd if=/dev/volgrp0/vmname-disk0 of=myfavorite-os.img; 5- copy it to your Cinder server: scp myfavorite-os.img to the server where your "cinder-volumes LVM VG" resides; 6- make a volume of ~5G via Openstack Dashboard or CLI; 7- find your "cloud cinder volume" on the Cinder server: lvdisplay 8- import your 2.5G image (myfavorite-os.img) into your Cinder volume: dd if=/path/of/myfavorite-os.img of=/dev/cinder-volumes/volume-a2fb85b1-512e-402b-9aaf-6ce1914295a4; 9- start a instance using any image as source (cirros) and choose to boot from this volume (a2fb85b1-512e-402b-9aaf-6ce1914295a4). The image source (cirros) will be ignored, I think... That's it! NOTE: If you can run a KVM VM on the same server of your Cinder, you can shrink part of this procedure, by doing it more directly: "dd if=/dev/volgrp0/vmname-disk0 of=/dev/cinder-volumes/volume-a2fb85b1-512e-402b-9aaf-6ce1914295a4" on step 4 (your cinder volume must be ready on that point). I prefer to make specific flavors to use with my "boot-from-volume" Instances. Best! Thiago On 30 January 2013 13:06, Avishay Traeger <avis...@il.ibm.com> wrote: > Lei Zhang <zhang.lei....@gmail.com> wrote on 01/30/2013 04:39:22 PM: > > I also have a question. What's the requirement for the image? I > > found nothing int the doc. > > Hi, > The requirements that I can think of off the top of my head are: > 1. The image should be bootable > 2. The image is converted to raw before being written to the volume, so it > should be a format the 'qemu-img' understands (raw, qcow2, vmdk, vdi) > 3. There must be sufficient space to write the raw version of the image > > Thanks, > Avishay > > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp >
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