openstack team mailing list archive

[Rogério Vinhal Nunes <rogervn@xxxxxxxxxxx>]

Hello, I've upgraded to Diablo to see if this issue was resolved, but
apparently it isn't.

There is already a thread talking about it, but it didn't come to a solution
that I could use. After having Openstack configured with Xen and libvirt in
Ubuntu 10.04 whenever I run an instance it is started, but it stops with a
kernel panic trying to mount root by using xvda, but sda is the only
available.

I'm using Diablo's nova + glance and the
ubuntu1010-UEC-localuser-image.tar.gz from the manual.

The kernel panic is like this:

[    0.170563] VFS: Cannot open root device "xvda" or unknown-block(0,0)
[    0.170572] Please append a correct "root=" boot option; here are the
available partitions:
[    0.170585] ca00           32768 sda driver: vbd
[    0.170594] Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)
[    0.170604] Pid: 1, comm: swapper Not tainted 2.6.35-24-virtual
#42-Ubuntu

I've played with libvirt.xml.template, it changed a lot since Cactus, so I
tried to replace xvda with sda, and the kernel panic didn't go away, just
changed a little:

[    0.161237] List of all partitions:
[    0.161248] ca00           32768 sda driver: vbd
[    0.161257] No filesystem could mount root, tried:  ext3 ext2 ext4
fuseblk
[    0.161275] Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(202,0)
[    0.161286] Pid: 1, comm: swapper Not tainted 2.6.35-24-virtual
#42-Ubuntu

I've tried using --xenapi_remap_vbd_dev=true, but it didn't work (it
wouldn't also because I'm using libvirt, not xenapi).

Does anyone know a way I can stop this? Even if it is just a workaround.

Thanks.