hi,
I am trying to boot using a rootfs image, instead of a disk image. Just because it
is much easier to mount filesystems, then to go calculate offsets for mounting. Also,
because I have various xen2 filesystems I want to use without building virtual disk
images. On FC5, using kernel= with a *xenU image works fine. On FC6, using the *xen
kernel image, this does not work. (using known working fc5 xen kernels on fc6 also
didn't work, but I expected that, due to differences in the xen hypervisor)
Instead of using bootloader="/usr/bin/pygrub" I manaully set the kernel, ramdisk
and extra flags, eg:
disk = [ 'file:/xen/qtopia.xelerance.net/qtopia.ext3.img,xvda1,w' ]
kernel="/boot/vmlinuz-2.6.18-1.2798.fc6xen"
root="/dev/xvda1 ro"
extra="ro selinux=0 3 root=/dev/xvda1 initrd=/boot/initrd-2.6.18-1.2798.fc6xen.img"
ramdisk="/boot/initrd-2.6.18-1.2798.fc6xen.img"
(also tried using hda1 instead of xvda1)
But when I boot, I see the following:
[...]
XENBUS: Device with no driver: device/vbd/51713
XENBUS: Device with no driver: device/vif/0
Freeing unused kernel memory: 180k freed
Write protecting the kernel read-only data: 356k
Red Hat nash version 5.1.19 starting
Mounting proc filesystem
Mounting sysfs filesystem
Creating /dev
Creating initial device nodes
Setting up hotplug.
Creating block device nodes.
Loading uhci-hcd.ko module
USB Universal Host Controller Interface driver v3.0
Loading ohci-hcd.ko module
Loading ehci-hcd.ko module
Loading jbd.ko module
Loading ext3.ko module
Loading scsi_mod.ko module
SCSI subsystem initialized
Loading sd_mod.ko module
Loading libata.ko module
Loading ahci.ko module
Loading ata_piix.ko module
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
It seems the xenblck and xennet drivers are not being loaded? And indeed,
dissecting the initrd file, I don't see them. However, grepping the config
shows they are now inline:
# grep XENB /boot/config-2.6.18-1.2798.fc6xen
CONFIG_XEN_XENBUS_DEV=y
So I am not sure why xen is not picking up the settings - though pygrub
can find them.
The same machine boots fine with pygrub, so it must be something that
I'm doing wrong myself. but even running xm create -n configname did
not give me a clue on what it is that I'm doing wrong.
I've attached the output of xm create -n below.
Using config file "/etc/xen/qtopia.xelerance.net".
(vm
(name qtopia.xelerance.net)
(memory 256)
(on_reboot restart)
(on_crash restart)
(vcpus 1)
(uuid 10000007-f66d-374b-29fc-364cd7761111)
(image
(linux
(kernel /boot/vmlinuz-2.6.18-1.2798.fc6xen)
(ramdisk /boot/initrd-2.6.18-1.2798.fc6xen.img)
(root '/dev/xvda1 ro')
(args
'ro selinux=0 3 root=/dev/xvda1 initrd=/boot/initrd-2.6.18-1.2798.fc6xen.img'
)
(vncunused 1)
(xauthority /root/.Xauthority)
)
)
(device
(vbd
(uname file:/xen/qtopia.xelerance.net/qtopia.ext3.img)
(dev xvda1)
(mode w)
)
)
(device (vif (bridge xenbr0) (mac 00:16:3e:7a:0e:57)))
)
Paul
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