openstack team mailing list archive

[Rogério Vinhal Nunes <rogervn@xxxxxxxxxxx>]

Yes, I am able to start a vm with libvirt and Xen, but I've not tried a xml
based on the one openstack generates. I will see if I can try tomorrow to
run a separate VM modifying OS's libvirt xml.

I really need to use libvirt due to the live migration support, thus XCP or
XenServer + xenapi would not work for me. Also I have a very specific
environment I am trying to include openstack that I can't change right now.

Also that is a good way to test Openstack and Xen integration outside
XenServer.

Em 27 de setembro de 2011 23:11, Todd Deshane <todd.deshane@xxxxxxx>escreveu:

> 2011/9/27 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
> >
>
> Are you able to start a guest manually with Xen + libvirt (without
> OpenStack)?
>
> That's the first step to debugging this issue.
>
> > 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).
> >
>
> Would XCP or XenServer work for you in general? (The XenAPI-based
> hypervisors are more tested and even have more features compared with
> libvirt - http://wiki.openstack.org/XenAPI)
>
>
> Or even Project Kronos (also uses XCP/XenServer toolstack)
> http://blog.xen.org/index.php/2011/07/22/project-kronos/
>
> Thanks,
> Todd
>
> --
> Todd Deshane
> http://www.linkedin.com/in/deshantm
> http://www.xen.org/products/cloudxen.html
> http://runningxen.com/
>