Extlinux fallback
If GRUB2 is not available in the system a fallback to install Extlinux will happen. This patch also allows you to enforce the use of Extlinux exporting the DIB_EXTLINUX variable. Change-Id: I88fa792a0bd19cacca167134f2054b11c807a451
This commit is contained in:
Lucas Alvares Gomes
parent
b01f412c1e
commit
5dd6c4a834
@ -49,6 +49,7 @@ package_map = {
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'openssh-client': 'openssh-clients',
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'qpidd': 'qpid-cpp-server',
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'qpid-client': 'qpid-cpp-client',
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'extlinux': 'syslinux-extlinux',
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}
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for arg in sys.argv[1:]:
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@ -1,5 +1,7 @@
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Sets up a partitioned disk (rather than building just one filesystem with no
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partition table).
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The disk will have grub[2]-install run on it, and that assumes a functional
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grub[2] setup.
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By default the disk will have grub[2]-install run on it, in case GRUB2
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is not available in the system a fallback to Extlinux will happen. It's
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also possible to enforce the use of Extlinux exporting a DIB_EXTLINUX
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varible to the environment.
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@ -6,101 +6,158 @@
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set -e
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set -x
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install-packages grub-pc
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# XXX: grub-probe on the nbd0/loop0 device returns nothing - workaround, manually
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# specify modules. https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1073731
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GRUBNAME=`which grub-install` || echo "trying grub2-install"
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if [ -z "$GRUBNAME" ]; then
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GRUBNAME="bash -x `which grub2-install`"
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fi
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if [ -z "$GRUBNAME" ]; then
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echo "NO grub-install or grub2-install found"
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exit 1
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fi
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# FIXME:
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[ -n "$IMAGE_BLOCK_DEVICE" ]
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PART_DEV=$IMAGE_BLOCK_DEVICE
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BOOT_DEV=$(echo $IMAGE_BLOCK_DEVICE | sed -e 's/p1//')
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GRUB_OPTS=${GRUB_OPTS:""}
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# XXX: This is buggy:
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# - --target=i386-pc is invalid for non-i386/amd64 architectures
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# - and for UEFI too.
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# GRUB_OPTS="$GRUB_OPTS --target=i386-pc"
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if [[ ! $GRUB_OPTS == *--target* ]]; then
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# /sys/ comes from the host machine. If the host machine is using EFI
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# but the image being built doesn't have EFI boot-images installed we
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# should set the --target to use a BIOS-based boot-image.
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#
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# * --target tells grub what's the target platform
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# * the boot images are placed in /usr/lib/grub/<cpu>-<platform>
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# * i386-pc is used for BIOS-based machines
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# http://www.gnu.org/software/grub/manual/grub.html#Installation
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#
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if [ -d /sys/firmware/efi ]; then
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if [ ! -d /usr/lib/grub/*-efi ]; then
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case $ARCH in
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"x86_64"|"amd64")
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GRUB_OPTS="$GRUB_OPTS --target=i386-pc"
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;;
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"i386")
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target=i386-pc
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if [ -e /proc/device-tree ]; then
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for x in /proc/device-tree/*; do
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if [ -e "$x" ]; then
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target="i386-ieee1275"
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fi
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done
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fi
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GRUB_OPTS="$GRUB_OPTS --target=$target"
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;;
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esac
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BOOT_DEV=$(echo $IMAGE_BLOCK_DEVICE | sed -e 's#p1##' | sed -e 's#mapper/##')
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function install_extlinux {
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install-packages extlinux
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echo "Installing Extlinux..."
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MBR=/usr/share/syslinux/mbr.bin
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if [ ! -f $MBR ]; then
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MBR=/usr/lib/syslinux/mbr.bin
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if [ ! -f $MBR ]; then
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echo "mbr.bin (from SYSLINUX) not found."
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exit 1
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fi
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fi
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fi
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fi
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$GRUBNAME --modules="biosdisk part_msdos" $GRUB_OPTS $BOOT_DEV
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dd if=$MBR of=$BOOT_DEV
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# This might be better factored out into a per-distro 'install-bootblock'
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# helper.
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if [ -f "/boot/grub/grub.cfg" ] ; then
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GRUB_CFG=/boot/grub/grub.cfg
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elif [ -f "/boot/grub2/grub.cfg" ] ; then
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GRUB_CFG=/boot/grub2/grub.cfg
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fi
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mkdir -p /boot/syslinux
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extlinux --install /boot/syslinux
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# If GRUB configuration file does not exist, generate one
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if [ ! $GRUB_CFG ]; then
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if [ -d /boot/grub2 ]; then
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GRUB_CFG=/boot/grub2/grub.cfg
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elif [ -d /boot/grub ]; then
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GRUB_CFG=/boot/grub/grub.cfg
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fi
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grub2-mkconfig -o $GRUB_CFG
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fi;
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if [ -f /etc/redhat-release ]; then
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kernel=$(ls -1rv /boot/vmlinuz* | head -1)
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initrd=$(ls -1rv /boot/initramfs* | head -1)
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elif [ -f /etc/debian_version ]; then
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kernel=$(ls -1rv /boot/vmlinuz*generic | head -1)
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initrd=$(ls -1rv /boot/initrd*generic | head -1)
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else
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echo "Unable to find kernel and initram"
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exit 1
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fi
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DIST=`lsb_release -is`
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[ -n "$DIST" ]
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RELEASE=`lsb_release -cs`
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[ -n "$RELEASE" ]
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# grub-mkconfig generates a config with the device in it,
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# This shouldn't be needed, but old code has bugs
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if [ $RELEASE = 'precise' ] ; then
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# Replace the search attempt with a hardcoded root as the Ubuntu reference
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# images use.
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sed -i "s%search --no.*%%" $GRUB_CFG
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sed -i "s%set root=.*%set root=(hd0,1)%" $GRUB_CFG
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fi
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# force use of a LABEL:
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# NOTE: Updating the grub config by hand once deployed should work, its just
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# prepping it in a different environment that needs fiddling.
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sed -i "s%$PART_DEV%LABEL=cloudimg-rootfs%" $GRUB_CFG
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sed -i "s%search --no-floppy --fs-uuid --set=root .*$%search --no-floppy --set=root --label cloudimg-rootfs%" $GRUB_CFG
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sed -i "s%root=UUID=[A-Za-z0-9\-]*%root=LABEL=cloudimg-rootfs%" $GRUB_CFG
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if [ $DIST = 'Fedora' ] ; then
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# enable serial console
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sed -i "s%LABEL=cloudimg-rootfs%LABEL=cloudimg-rootfs console=tty0 console=ttyS0,115200%" $GRUB_CFG
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if [ $(lsb_release -rs) = '19' ]; then
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sed -i "s%UUID=[A-Za-z0-9\-]*%LABEL=cloudimg-rootfs%" /etc/fstab
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fi
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cat > /boot/syslinux/syslinux.cfg<<_EOF_
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DEFAULT linux
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LABEL linux
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KERNEL $kernel
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APPEND rw root=LABEL=cloudimg-rootfs
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INITRD $initrd
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_EOF_
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}
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function install_grub2 {
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install-packages grub-pc
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# XXX: grub-probe on the nbd0/loop0 device returns nothing - workaround, manually
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# specify modules. https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1073731
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GRUBNAME=`which grub-install` || echo "trying grub2-install"
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if [ -z "$GRUBNAME" ]; then
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GRUBNAME="bash -x `which grub2-install`"
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fi
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# If no GRUB2 is found, fallback to extlinux
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if [ -z "$GRUBNAME" ] || [ $($GRUBNAME --version | grep "0.97" | wc -l) -ne 0 ]; then
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echo "No GRUB2 found. Fallback to Extlinux..."
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install_extlinux
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exit 0
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fi
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echo "Installing GRUB2..."
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GRUB_OPTS=${GRUB_OPTS:""}
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# XXX: This is buggy:
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# - --target=i386-pc is invalid for non-i386/amd64 architectures
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# - and for UEFI too.
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# GRUB_OPTS="$GRUB_OPTS --target=i386-pc"
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if [[ ! $GRUB_OPTS == *--target* ]]; then
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# /sys/ comes from the host machine. If the host machine is using EFI
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# but the image being built doesn't have EFI boot-images installed we
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# should set the --target to use a BIOS-based boot-image.
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#
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# * --target tells grub what's the target platform
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# * the boot images are placed in /usr/lib/grub/<cpu>-<platform>
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# * i386-pc is used for BIOS-based machines
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# http://www.gnu.org/software/grub/manual/grub.html#Installation
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#
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if [ -d /sys/firmware/efi ]; then
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if [ ! -d /usr/lib/grub/*-efi ]; then
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case $ARCH in
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"x86_64"|"amd64")
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GRUB_OPTS="$GRUB_OPTS --target=i386-pc"
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;;
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"i386")
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target=i386-pc
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if [ -e /proc/device-tree ]; then
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for x in /proc/device-tree/*; do
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if [ -e "$x" ]; then
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target="i386-ieee1275"
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fi
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done
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fi
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GRUB_OPTS="$GRUB_OPTS --target=$target"
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;;
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esac
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fi
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fi
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fi
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$GRUBNAME --modules="biosdisk part_msdos" $GRUB_OPTS $BOOT_DEV
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# This might be better factored out into a per-distro 'install-bootblock'
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# helper.
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if [ -f "/boot/grub/grub.cfg" ] ; then
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GRUB_CFG=/boot/grub/grub.cfg
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elif [ -f "/boot/grub2/grub.cfg" ] ; then
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GRUB_CFG=/boot/grub2/grub.cfg
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fi
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# If GRUB configuration file does not exist, generate one
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if [ ! $GRUB_CFG ]; then
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if [ -d /boot/grub2 ]; then
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GRUB_CFG=/boot/grub2/grub.cfg
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elif [ -d /boot/grub ]; then
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GRUB_CFG=/boot/grub/grub.cfg
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fi
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grub2-mkconfig -o $GRUB_CFG
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fi;
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DIST=`lsb_release -is`
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[ -n "$DIST" ]
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RELEASE=`lsb_release -cs`
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[ -n "$RELEASE" ]
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# grub-mkconfig generates a config with the device in it,
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# This shouldn't be needed, but old code has bugs
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if [ $RELEASE = 'precise' ] ; then
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# Replace the search attempt with a hardcoded root as the Ubuntu reference
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# images use.
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sed -i "s%search --no.*%%" $GRUB_CFG
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sed -i "s%set root=.*%set root=(hd0,1)%" $GRUB_CFG
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fi
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# force use of a LABEL:
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# NOTE: Updating the grub config by hand once deployed should work, its just
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# prepping it in a different environment that needs fiddling.
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sed -i "s%$PART_DEV%LABEL=cloudimg-rootfs%" $GRUB_CFG
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sed -i "s%search --no-floppy --fs-uuid --set=root .*$%search --no-floppy --set=root --label cloudimg-rootfs%" $GRUB_CFG
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sed -i "s%root=UUID=[A-Za-z0-9\-]*%root=LABEL=cloudimg-rootfs%" $GRUB_CFG
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if [ $DIST = 'Fedora' ] ; then
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# enable serial console
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sed -i "s%LABEL=cloudimg-rootfs%LABEL=cloudimg-rootfs console=tty0 console=ttyS0,115200%" $GRUB_CFG
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if [ $(lsb_release -rs) = '19' ]; then
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sed -i "s%UUID=[A-Za-z0-9\-]*%LABEL=cloudimg-rootfs%" /etc/fstab
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fi
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fi
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}
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DIB_EXTLINUX=${DIB_EXTLINUX:-0}
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if [ "$DIB_EXTLINUX" != "0" ]; then
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install_extlinux
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else
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install_grub2
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fi
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