66 lines
2.3 KiB
Text
66 lines
2.3 KiB
Text
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#!/bin/bash
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# Configure grub. Note that the various conditionals here are to handle
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# different distributions gracefully.
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if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
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set -x
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fi
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set -eu
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set -o pipefail
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BOOT_DEV=$IMAGE_BLOCK_DEVICE
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# All available devices, handy for some bootloaders...
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declare -A DEVICES
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eval DEVICES=( $IMAGE_BLOCK_DEVICES )
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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 [ -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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if type grub2-mkconfig >/dev/null; then
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GRUB_MKCONFIG="grub2-mkconfig -o $GRUB_CFG"
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else
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GRUB_MKCONFIG="grub-mkconfig -o $GRUB_CFG"
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fi
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# Retrieve root filesystem mount point to check if it is LVM based
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ROOTFS=$(awk '$2=="/"{print}' /proc/mounts)
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# Standard filesystems are mounted as /dev/mapper/loop* within DIB
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# so we need to exclude this case
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if echo "$ROOTFS" | grep -qv '/dev/mapper/loop'; then
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# LVM based filesystems are mounted as /dev/mapper/<VG_name>-<LV-NAME> within DIB
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if echo "$ROOTFS" | grep -q '/dev/mapper/'; then
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# Check if initramfs-tools are installed
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if [ ! -d /etc/initramfs-tools ]; then
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echo "You must have initramfs-tools installed for LVM based root filesystem to work properly"
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exit 1
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fi
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# Check if system supports LVM
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if ! type pvs >/dev/null 2>&1; then
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echo "You must have lvm2 package installed for LVM based root filesystem to work properly"
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exit 1
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fi
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# Check for appropriate filesystem support (for fsck)
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FSTYPE=$(echo $ROOTFS | awk '{print $3}')
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if ! type fsck.$FSTYPE >/dev/null 2>&1; then
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echo "You must have utility package for $FSTYPE filesystem installed for LVM based root filesystem to work properly (fsck.$FSTYPE is missing)"
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exit 1
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fi
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# Change the current GRUB_DEVICE from LABEL=(cloud)img-rootfs to /dev/mapper/...
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sed -i -e "s?^GRUB_DEVICE=.*?GRUB_DEVICE=$(echo $ROOTFS | awk '{print $1}')?" /etc/default/grub
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# This is required for LVM2 driver to be included in the
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# ramdisk of the image.
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echo "lvm2" >> /etc/initramfs-tools/modules
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# We need to regenerated the init ramdisk at this point
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update-initramfs -u -v
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fi
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fi
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$GRUB_MKCONFIG
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