On 06/08/2012 04:35 PM, Scott Moser wrote: > On Fri, 8 Jun 2012, Pádraig Brady wrote: > >> On 06/08/2012 09:20 AM, Fredric Morenius wrote: >>> Hello All, >>> >>> An update on the use of the qemu-nbd/kpartx based solution to inject files >>> into VM images: >>> >>> After some more testing it has turned out that injection into the UEC >>> version of CirrOS (this: >>> https://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-uec.tar.gz) >>> works fine, but injection into the qcow2 version of the image produces the >>> error given in the previous mail, so there seems to be robustness problems >>> with these tools. >> >> Yes it's seems that qemu-nbd has issues with this image? >> >> # rpm -qf $(which qemu-nbd) >> qemu-common-1.0-17.fc17.x86_64 >> # qemu-img info cirros-0.3.0-x86_64-disk.img >> image: cirros-0.3.0-x86_64-disk.img >> file format: qcow2 >> virtual size: 39M (41126400 bytes) >> disk size: 9.3M >> cluster_size: 65536 >> # qemu-nbd -c /dev/nbd15 $PWD/cirros-0.3.0-x86_64-disk.img >> # ls -la /sys/block/nbd15/pid >> -r--r--r--. 1 root root 4096 Jun 8 10:19 /sys/block/nbd15/pid >> # kpartx -a /dev/nbd15 >> device-mapper: resume ioctl on nbd15p1 failed: Invalid argument >> create/reload failed on nbd15p1 >> >> If I convert to raw with qemu-img, I can mount loopback fine. > > Well, interesting. It does seem to work here: > $ dpkg-query --show qemu-utils > qemu-utils 1.0+noroms-0ubuntu13 > $ cd /tmp > $ wget -q > https://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-disk.img > $ md5sum cirros-0.3.0-x86_64-disk.img > 6654705afc4b74fda3e1f4330559d066 cirros-0.3.0-x86_64-disk.img
I downloaded again and get 50bdc35edb03a38d91b1b071afb20a3c I presume the above md5sum is for a mounted/modified image? > $ qemu-img info cirros-0.3.0-x86_64-disk.img > image: cirros-0.3.0-x86_64-disk.img > file format: qcow2 > virtual size: 39M (41126400 bytes) > disk size: 11M > cluster_size: 65536 > $ sudo qemu-nbd -c /dev/nbd15 $PWD/cirros-0.3.0-x86_64-disk.img > $ ls -l /dev/nbd15* > brw-rw---- 1 root disk 43, 240 Jun 8 11:32 /dev/nbd15 > brw-rw---- 1 root disk 43, 241 Jun 8 11:32 /dev/nbd15p1 Very interesting. I don't get the ...p1 device here on a 3.3.7.fc17.x86_64 kernel cheers, Pádraig. _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
