10.01.2012 4:33, Norman Gaywood пишет: > On Mon, Jan 09, 2012 at 07:20:05PM -0500, S.Tindall wrote: >> On Mon, 2012-01-09 at 18:56 -0500, R P Herrold wrote: >>> On Tue, 10 Jan 2012, Norman Gaywood wrote: >>>> https://bugzilla.redhat.com/show_bug.cgi?id=746602 >>>> (pygrub cannot start F16 PV guests (GPT partition) under Xen 4.1.1) >>> why would one use GPT for a domU? seems like gross overkill > >> There are a bunch of grub2-related issues associated with F16 anaconda >> and one of the easiest ways to deal with them is to use gpt. There is a >> nogpt kernel option that may help, but I have not tried it. > Yes, GPT is the default for F16 so it is easier just to go with it. I > have tried the nogpt option and F16 installs OK (as it does without > it). However it still can't boot: > > [root@dom0 ~]# sfdisk -d /dev/VM/f16 > # partition table of /dev/VM/f16 > unit: sectors > > /dev/VM/f161 : start= 2048, size= 1024000, Id=83, bootable > /dev/VM/f162 : start= 1026048, size= 40916992, Id=8e > /dev/VM/f163 : start= 0, size= 0, Id= 0 > /dev/VM/f164 : start= 0, size= 0, Id= 0 > [root@dom0 ~]# pygrub -i /dev/VM/f16 > Traceback (most recent call last): > File "/usr/bin/pygrub", line 691, in ? > chosencfg = run_grub(file, entry, fs) > File "/usr/bin/pygrub", line 545, in run_grub > g = Grub(file, fs) > File "/usr/bin/pygrub", line 203, in __init__ > self.read_config(file, fs) > File "/usr/bin/pygrub", line 402, in read_config > if self.cf.filename is None: > AttributeError: Grub instance has no attribute 'cf' > > The error is in the parsing of the grub2 config I believe. > I've managed to setup F16 PV-guest domU under Xen Cloud Platform. It's more than just Xen, but solution will be the same. So what you need to do: 1) Don;t use GPT (install with nogpt kernel parameter) 2) Create bootable /boot partition using ext2 filesystem 3) pygrub looks for grub.cfg in /boot/grub directory (to be exact in /grub on /boot fs). But in F16 grub is located ion /boot/grub2. So I just copied grub.cfg from /boot/grub2 to /boot/grub. Maybe there is a better way to keep up-to-date copy of grub.cfg in /boot/grub. 4) pygrub bootloader fails on following line in default grub.cfg: set default="${saved_entry}" so I've replaced it with: set default=0 That should be enough to make f16 to run in PV mode. Hope it helps. Eugene _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos-virt
