On Thu, Mar 8, 2012 at 5:36 PM, Stefan Hajnoczi <stefa...@gmail.com> wrote:
> On Thu, Mar 8, 2012 at 3:53 PM, Laurent Eschenauer > <laur...@eschenauer.be> wrote: > > Below is a kinda crazy idea that I'm working on, and I'm now stuck due > to my > > gPxe kernel not having the 'boot protocol' >= 2.08. I'm not a kernel > guru; > > so I hope someone on this list may have some ideas/pointers to move > > forward. > > > > The context: > > I'm trying to create an Amazon EC2 AMI that just boots a gPxe kernel > which > > then chain to the EC2 user data to get its pxe configuration. This would > > enable to directly provision any kind of machine on EC2 using pxe, > removing > > the hassle of building/uploading images. Kickstart based install also > enable > > to customize the partition table, the packages, etc.. > > > > What I did so far: > > EC2 (which is Xen based) enable to boot on custom kernels (using > pv-grub). > > I'm not sure this can ever work. My Xen knowledge is small. Can you > please confirm that there is a BIOS and a network interface supported > by gPXE inside the EC2 instance? > Good question :-) > I suspect the guest may be paravirtualized with no BIOS and Xen pv > devices which gPXE does not support. In other words, gPXE doesn't > support Xen's pv architecture (which is different from the regular x86 > architecture). > Indeed, it seems pv-grub requires to boot on a kernel with pv-ops enabled. There is no way to force full virt on EC2 or change anything wrt xen versions or loader etc. > Sorry, I don't have time to dig into this but it's a requirement > before it would even be worth trying to execute the gPXE image. You've helped a lot already, saving me days of working towards a dead end. I'll try to setup my own xen server + pv-grub to do testing in a controlled environment before going further. Thanks for the help, Laurent
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