Re: [Xen-users] Startup-Hook Script ?

["Fajar A. Nugraha" <fajar@xxxxxxxxx>]

Steffen Heil wrote:
>   
> > For example this is my iscsi script:
> >
> > http://kinkrsoftware.nl/contrib/xen/block-iscsi
> >
> > If you do file based stuff I suggest you to look at a wrapper 
> > around tap:aio://
> >     
> As I use "phy:" for my devices, I added a script "block-boot-phy" as a copy
> of block and modified it to copy the kernel out of the device that was
> attached using "boot-phy:" and this works.
>
> But it works too late. The kernel or initrd is already loaded at that point.
>
>   
Since function-wise you're trying to achieve what pygrub does, it might 
be easier to create another pygrub-like script and put it as bootloader 
on your config file.
for example, pygrub takes these parameters :
/usr/bin/pygrub [-q|--quiet] [-i|--interactive] [--output=] [--kernel=] 
[--ramdisk=] [--args=] [--entry=] <image>
when used as bootloader on domU config file, pygrub will be invoked with 
something like
pygrub --output=/var/run/xend/boot/xenbl.3079 /dev/rootvg/testlv

Your script should only need to parse --output and <image>. The script 
output should be something like this, redirected to wherever --output 
points to :
linux (kernel /var/run/xend/boot/boot_kernel._rjEHS)(ramdisk 
/var/run/xend/boot/boot_ramdisk.5uZPgQ)(args "ro root=/dev/hda1")
Attached is bash script that MIGHT work you. This script does not parse 
grub's config file, so you might need to manually adjust ARGS at the top 
of the script as needed (my test works fine with empty ARGS though).
Regards,

Fajar

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