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authorNatanael Copa <ncopa@alpinelinux.org>2011-04-07 13:53:01 +0000
committerNatanael Copa <ncopa@alpinelinux.org>2011-04-07 13:53:01 +0000
commita64d6c51e42a3d18f63d05fa8a51560ecd01d8f3 (patch)
tree8d5482675cd385bfe95465ae6b1edf6207fb2041 /setup-disk.in
parenta9e48ab1b3c3d890da0009f28d67e6ede86d9d1f (diff)
downloadalpine-conf-a64d6c51e42a3d18f63d05fa8a51560ecd01d8f3.tar.bz2
alpine-conf-a64d6c51e42a3d18f63d05fa8a51560ecd01d8f3.tar.xz
setup-disk: implement data-only setup
Diffstat (limited to 'setup-disk.in')
-rw-r--r--setup-disk.in195
1 files changed, 186 insertions, 9 deletions
diff --git a/setup-disk.in b/setup-disk.in
index 97b812b..02518c2 100644
--- a/setup-disk.in
+++ b/setup-disk.in
@@ -286,6 +286,9 @@ fix_mbr_all_disks() {
# figure out decent default swap size in mega bytes
find_swap_size() {
+ if [ -n "$SWAP_SIZE" ]; then
+ return
+ fi
local memtotal_kb=$(awk '$1 == "MemTotal:" {print $2}' /proc/meminfo)
# use 2 * avaiable ram
echo $(( $memtotal_kb * 2 / 1024 ))
@@ -340,11 +343,18 @@ find_disks() {
done
}
+stop_all_raid() {
+ local rd
+ for rd in /dev/md*; do
+ [ -b $rd ] && mdadm --stop $rd
+ done
+}
+
native_disk_install() {
local rootdisk_dev="$1"
local i size
local boot_size=100 boot_part_type="83"
- local swap_size=$(find_swap_size) swap_part_type="82"
+ local swap_size="$SWAP_SIZE" swap_part_type="82"
local root_part_type="83"
local raidpkg= partitions=
local minimum_root_size=$(($boot_size * 2))
@@ -382,12 +392,7 @@ native_disk_install() {
esac
echo "Initializing partitions..."
- if [ -n "$USE_RAID" ]; then
- local rd
- for rd in md0 md1 md2; do
- [ -b /dev/$rd ] && mdadm --stop /dev/$rd
- done
- fi
+ [ -n "$USE_RAID" ] && stop_all_raid
# new disks does not have an DOS signature in sector 0
# this makes sfdisk complain. We can workaround this by letting
@@ -466,8 +471,166 @@ EOF
apk del -q syslinux
}
+# install needed programs
+init_progs() {
+ local raidpkg=
+ [ -n "$USE_RAID" ] && raidpkg="mdadm"
+ apk_add -q sfdisk e2fsprogs lvm2 $raidpkg
+}
+
+# setup disk dev in $1 for LVM usage.
+# usage: setup_partitions <diskdev> <bootsize>
+# if <boot_size> is set, then will a partition for boot be created.
+setup_partitions() {
+ local diskdev="$1"
+ local answer=
+ local boot_size="$2" boot_part_type="83"
+ local lvm_part_type="8e"
+ local minimum_lvm_size=$(($boot_size * 2))
+
+ if [ -n "$USE_RAID" ]; then
+ boot_part_type="fd"
+ lvm_part_type="fd"
+ fi
+
+ local lvm_size=$(( $(sfdisk -s $diskdev) / 1024 - $boot_size))
+ if [ "$lvm_size" -lt "$minimum_lvm_size" ]; then
+ echo "The $diskdev is too small. At least $(( $boot_size + $minimum_lvm_size)) is needed." >&2
+ return 1
+ fi
+
+ echo -n "WARNING: All contents of $diskdev will be erased. Continue? [y/N]: "
+ read answer
+ case "$answer" in
+ y*|Y*);;
+ *) return 1;;
+ esac
+
+ echo "Initializing partitions..."
+ [ -n "$USE_RAID" ] && stop_all_raid
+
+ # new disks does not have an DOS signature in sector 0
+ # this makes sfdisk complain. We can workaround this by letting
+ # fdisk create that DOS signature, by just do a "w", a write.
+ # http://bugs.alpinelinux.org/issues/show/145
+ echo "w" | fdisk $diskdev >/dev/null
+
+ # create new partitions
+ (
+ if [ $boot_size -gt 0 ]; then
+ echo "0,$boot_size,$boot_part_type,*"
+ fi
+ echo ",,$lvm_part_type"
+ ) | sfdisk -q -L -uM $diskdev >>/tmp/sfdisk.out || return 1
+
+ # create device nodes if not exist
+ mdev -s
+}
+
+# find the bootable partition on given disk
+find_boot_partition() {
+ sfdisk -d $1 | awk '/bootable/ {print $1}'
+}
+
+# find the partition(s) for LVM
+# this is not marked as bootable and is either type 8e of fd depending on
+# if raid is used or not
+find_lvm_partition() {
+ local type=8e
+ [ -n "$USE_RAID" ] && type=fd
+ sfdisk -d $1 | grep -v bootable | awk "/Id=$type/ {print \$1}"
+}
+
+# set up boot device
+setup_boot_dev() {
+ local bootfs=ext4
+ local diskdev="$1"
+ local part=$(find_boot_partition $diskdev)
+ local bootdev=$part
+ [ -z "$bootdev" ] && return 1
+ if [ -n "$USE_RAID" ]; then
+ mdadm --create /dev/md0 --level=1 --raid-devices=2 \
+ --metadata=0.90 --quiet --run $part missing || return 1
+ bootdev=/dev/md0
+ fi
+ mkfs.$bootfs -q $bootdev
+ BOOT_DEV="$boot_dev"
+}
+
+# setup device for lvm, create raid array if needed
+setup_lvm_volume_group() {
+ local diskdev="$1"
+ local vgname="$2"
+ local part=$(find_lvm_partition $diskdev)
+ local lvmdev=$part
+
+ if [ -n "$USE_RAID" ]; then
+ if [ -n "$BOOT_DEV" ]; then
+ lvmdev=/dev/md1
+ else
+ lvmdev=/dev/md0
+ fi
+ mdadm --create $lvmdev --level=1 --raid-devices=2 \
+ --quiet --run $part missing || return 1
+ fi
+
+ # be quiet on success
+ local errmsg=$(dd if=/dev/zero of=$lvmdev bs=1k count=1 2>&1) \
+ || echo "$errmsg"
+ pvcreate --quiet $lvmdev && vgcreate --quiet $vgname $lvmdev
+}
+
+# setup and enable swap on given volumegroup if needed
+setup_swap() {
+ local vgname="$1"
+ local swap_dev=/dev/$vgname/lv_swap
+ if [ -z "$SWAP_SIZE" ] || [ "$SWAP_SIZE" -eq 0 ]; then
+ return
+ fi
+ lvcreate --quiet -n lv_swap -L ${SWAP_SIZE}MB $vgname
+ mkswap $swap_dev >/dev/null
+ sed -i -e '/swap/d' /etc/fstab
+ echo -e "$swap_dev\tswap\t\tswap\tdefaults 0 0" >> /etc/fstab
+ swapon -a
+ rc-update --quiet add swap boot
+}
+
+# if /var is mounted, move out data and umount it
+reset_var() {
+ [ -z "$(find_mount_dev /var)" ] && return 0
+ mkdir /.var
+ mv /var/* /.var/ 2>/dev/null
+ umount /var && rm -rf /var && mv /.var /var && rm -rf /var/lost+found
+}
+
data_only_disk_install() {
- echo "TODO: $1"
+ local diskdev="$1"
+ local varfs=ext4
+ local vgname=vg0
+ local var_dev=/dev/$vgname/lv_var
+
+ init_progs || return 1
+
+ setup_partitions $diskdev 0 || return 1
+ setup_lvm_volume_group $diskdev $vgname || return 1
+
+ setup_swap $vgname
+
+ lvcreate --quiet -n ${var_dev##*/} -l 100%FREE $vgname
+ mkfs.$varfs -q $var_dev >/dev/null || return 1
+ sed -i -e '/[[:space:]]\/var[[:space:]]/d' /etc/fstab
+ echo -e "${var_dev}\t/var\t\t${varfs}\tdefaults 1 2" >> /etc/fstab
+
+ mv /var /.var
+ mkdir /var
+ mount /var
+ mv /.var/* /var/
+ rmdir /.var
+
+ if [ -n "$USE_RAID" ]; then
+ mdadm --detail --scan > /etc/mdadm.conf
+ rc-update --quiet add mdadm-raid boot
+ fi
}
usage() {
@@ -532,12 +695,14 @@ case "$(uname -r)" in
*-pae) KERNEL_FLAVOR=pae;;
esac
+SWAP_SIZE=$(find_swap_size)
# Parse args
-while getopts "hk:o:rv" opt; do
+while getopts "hk:o:rs:v" opt; do
case $opt in
k) KERNEL_FLAVOR="$OPTARG";;
r) USE_RAID=1;;
o) APKOVL="$OPTARG";;
+ s) SWAP_SIZE="$OPTARG";;
v) VERBOSE=1;;
*) usage;;
esac
@@ -550,6 +715,16 @@ if [ -d "$1" ]; then
exit $?
fi
+reset_var
+swapoff -a
+
+# stop all volume groups in use
+vgchange --ignorelockingfailure -a n >/dev/null 2>&1
+
+if [ -n "$USE_RAID" ]; then
+ stop_all_raid
+fi
+
disks=$(find_disks)
disk=none
@@ -587,6 +762,8 @@ if [ "$disk" != none ]; then
fi
+dmesg -n1
+
# native disk install
case "$diskmode" in
root) native_disk_install /dev/$disk;;