Create boot partition on install

Mixed mbr and gpt logical volumes combined with root eventually growing to >2.19TB requires we split off a boot partition. Turnkey installer does not by default, so modify /dev/vda in situ during install

Author: iczerjones

build_install/payload/installer

@@ -68,6 +68,50 @@ userconfig(){
 	fi
 }
 
+reclaimboot(){
+	vdaoffset=`echo $(($(fdisk -l /dev/vda | grep Disk | awk '{print $7}')-1999872))`
+	vdafix=`echo $(( ${vdaoffset} * 512 ))`
+	vda1end=`echo $(( ${vdaoffset} + 8 ))`
+	pvresize --setphysicalvolumesize ${vdafix}b /dev/vda1 <<EOF
+y
+EOF
+	fdisk /dev/vda <<EOF
+d
+n
+p
+1
+2048
++${vda1end}
+N
+n
+p
+2
+
+
+a
+2
+t
+1
+8e
+w
+EOF
+	mkfs.ext2 /dev/vda2 &>/dev/null
+	bootuuid=$(blkid | grep vda2 | awk '{print $2}' | tr -d '"')
+	echo "${bootuuid} /boot    ext2    errors=remount-ro 0      1" >> /etc/fstab
+	mount /dev/vda2 /mnt
+	cp -a /boot/* /mnt/
+	sync; umount /mnt
+	rm -rf /boot/*
+	mount /dev/vda2 /boot
+	grub-mkconfig -o /boot/grub/grub.cfg &>/dev/null
+	grub-install --root-directory=/ --boot-directory=/boot /dev/vda &>/dev/null
+	update-initramfs -u &>/dev/null
+}
+
+if [ `mount | grep /boot | wc -l` -lt 1 ]; then
+	echo "[ Setting up boot volume ]"; reclaimboot
+fi
+
 vgroups=(`vgs | awk '{print $1}'`); vgroups=("${vgroups[@]:1}")
 lvols=(`lvs | awk '{print $1}'`); lvols=("${lvols[@]:1}")
 lvtarget=""