[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] /etc/grub.d/09-xen for generating grub.cfg for hypervisor boot entries.
If this has already been done, please forgive me. However, if not, I'd like to submit this as a mechanism for generating a bootable grub2 stanza for hypervisors. As the /etc/grub.d/* files rely on defaults in /etc/default/grub, I added the following Xen specific variable:
GRUB_CMDLINE_XEN_DEFAULT="console=com1 115200,8n1 dom0_mem=512M dom0_max_vcpus=1 dom0_vcpus_pin=true iommu=1,passthrough,no-intremap loglvl=all loglvl_guest=all loglevl=10 debug acpi=force apic=on apic_verbosity=verbose numa=on"
The script itself is a hacked version of the10-linux that comes with grub2. This is 09-xen so it places it's boot entries ahead of the non-xen entries. The resulting grub.cfg entry looks like:
### BEGIN /etc/grub.d/09_xen ### insmod lvm set root=(system-dom0_0) menuentry "Xen osa-dom0 6.0.13-05, linux 2.6.32.12" { multiboot /boot/xen.gz /boot/xen.gz console=com1 115200,8n1 dom0_mem=512M dom0_max_vcpus=1 dom0_vcpus_pin=true iommu=1,passthrough,no-intremap loglvl=all loglvl_guest=all loglevl=10 debug acpi=force apic=on apic_verbosity=verbose numa=on
module /boot/vmlinuz-2.6.32.12 /boot/vmlinuz-2.6.32.12 root=UUID=a3764d7d-6292-4f08-8ece-480e54c77229 ro earlyprintk=xen loglevel=10 debug acpi=force console=hvc0,115200n8 module /boot/initrd.img-2.6.32.12 /boot/initrd.img-2.6.32.12
} ### END /etc/grub.d/09_xen ### Note the duplication of the first params. I believe there's a bug that drops the 1st param so this could be changed later. #! /bin/sh -e prefix=/usr exec_prefix=${prefix} libdir=${exec_prefix}/lib . ${libdir}/grub/update-grub_lib if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
OS=GNU/Linux else OS="${GRUB_DISTRIBUTOR}" fi # Source grub defaults . /etc/default/grub # loop-AES arranges things so that /dev/loop/X can be our root device, but
# the initrds that Linux uses don't like that. case ${GRUB_DEVICE} in /dev/loop/*|/dev/loop[0-9]) GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
;; esac if [ "x${GRUB_DEVICE_UUID}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \ || ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" ; then
LINUX_ROOT_DEVICE=${GRUB_DEVICE} else LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID} fi test_gt () { local a=`echo $1 | sed -e "s,.*/vmlinu[zx]-,,g;s/[._-]\(pre\|rc\|test\|git\|old\)/~\1/g"`
local b=`echo $2 | sed -e "s,.*/vmlinu[zx]-,,g;s/[._-]\(pre\|rc\|test\|git\|old\)/~\1/g"` if [ "x$b" = "x" ] ; then return 0 fi dpkg --compare-versions "$a" gt "$b"
return $? } find_latest () { local a="" for i in $@ ; do if test_gt "$i" "$a" ; then a="$i"
fi done echo "$a" } list=`for i in /boot/vmlinu[xz]-* /vmlinu[xz]-* ; do if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi
done` while [ "x$list" != "x" ] ; do linux=`find_latest $list` echo "Found linux image: $linux" >&2 basename=`basename $linux`
dirname=`dirname $linux` rel_dirname=`make_system_path_relative_to_its_root $dirname` version=`echo $basename | sed -e "s,^[^0-9]*-,,g"` alt_version=`echo $version | sed -e "s,\.old$,,g"`
linux_root_device_thisversion="${LINUX_ROOT_DEVICE}" initrd= for i in "initrd.img-${version}" "initrd-${version}.img" \ "initrd.img-${alt_version}" "initrd-${alt_version}.img"; do
if test -e "${dirname}/${i}" ; then initrd="$i" break fi done if test -n "${initrd}" ; then echo "Found initrd image: ${dirname}/${initrd}" >&2
else # "UUID=" magic is parsed by initrds. Since there's no initrd, it can't work here. linux_root_device_thisversion=${GRUB_DEVICE} fi cat << EOF insmod lvm set root=(system-dom0_0) menuentry "Xen ${OS}, linux ${version}" { multiboot /boot/xen.gz /boot/xen.gz $GRUB_CMDLINE_XEN_DEFAULT
module ${rel_dirname}/${basename} ${rel_dirname}/${basename} root=${linux_root_device_thisversion} $GRUB_CMDLINE_LINUX_DEFAULT EOF if test -n "${initrd}" ; then cat << EOF
module ${rel_dirname}/${initrd} ${rel_dirname}/${initrd} EOF fi cat << EOF } EOF list=`echo $list | tr ' ' '\n' | grep -vx $linux | tr '\n' ' '`
done -Bruce _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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