Opened bug: https://bugs.launchpad.net/nova/+bug/884984
On Tue, Nov 1, 2011 at 12:49 PM, Vishvananda Ishaya <vishvana...@gmail.com>wrote: > Sounds like we can work around this pretty easily by sorting the disks > before we pass them into the xml template. > > Vish > > On Nov 1, 2011, at 9:52 AM, Gaurav Gupta wrote: > > Hi all, I asked a question on Launchpad. but haven't heard back anything > yet. Trying this forum to see if someone has any idea how to resolve this > issue: > https://answers.launchpad.net/nova/+question/176938 > > To summarize: > ---------------------- > > Say I had 2 disks, disk1 and disk2 (represented by 2 volumes). disk1 has > the root-file-system and disk2 has some data. I boot an instances using the > boot-from-volumes extension, and specify the 2 disks such as disk1 should > be attached to /dev/vda and disk2 to /dev/vdb. When the instance is > launched it fails to boot, because it tries to find the root-filesystem on > disk2 instead. > > The underlying problem is with virsh/libvirt. Boot fails because in the > libvirt.xml file created by Openstack, disk2 (/dev/vdb) is listed before > disk1 (/dev/vda). So, what happens is that the hypervisor attaches disk2 > first (since its listed first in the XML). Therefore when these disks are > attached on the guest, disk2 appears as /dev/vda and disk1 as /dev/vdb, > which causes the boot failure. Later the kernel tries to find the root > filesystem on '/dev/vda' (because thats' what is selected as the root) and > it fails for obvious reason. I think it's a virsh bug. It should be smart > about it and attach the devices in the right order. > _______________________________________________ > 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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