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Merge pull request #775 from justincormack/extend

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Resize device if there is free space
This commit is contained in:
Justin Cormack 2016-11-22 14:41:55 -08:00 committed by GitHub
commit e35e337503
1 changed files with 51 additions and 16 deletions
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67
alpine/packages/automount/etc/init.d/automount
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@ -18,6 +18,40 @@ do_fsck()
return "${EXIT_CODE}"
}
do_fsck_extend_mount()
{
DRIVE="$1"
DATA="$2"
do_fsck "$DATA" || return 1
# only try to extend if there is a single partition and free space
PARTITIONS=$(sfdisk -J "$DRIVE" | jq '.partitiontable.partitions | length')
if [ "$PARTITIONS" -eq 1 ] && \
sfdisk -F "$DRIVE" | grep -q 'Unpartitioned space' &&
! sfdisk -F "$DRIVE" | grep -q '0 B, 0 bytes, 0 sectors'
then
SPACE=$(sfdisk -F "$DRIVE" | grep 'Unpartitioned space')
printf "Resizing disk partition: $SPACE\n"
START=$(sfdisk -J "$DRIVE" | jq -e '.partitiontable.partitions | map(select(.type=="83")) | .[0].start')
sfdisk -q --delete "$DRIVE" 2> /dev/null
echo "${START},,83;" | sfdisk -q "$DRIVE"
# update status
blockdev --rereadpt $diskdev 2> /dev/null
mdev -s
resize2fs "$DATA"
do_fsck "$DATA" || return 1
fi
mount "$DATA" /var
}
do_mkfs()
{
diskdev="$1"
@ -25,11 +59,11 @@ do_mkfs()
# 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
# http://bugs.alpinelinux.org/issues/145
echo "w" | fdisk $diskdev >/dev/null
# format one large partition, offset 1M
printf "1M,,83\n" | sfdisk --quiet $diskdev
# format one large partition
echo ";" | sfdisk --quiet $diskdev
# update status
blockdev --rereadpt $diskdev 2> /dev/null
@ -45,8 +79,8 @@ do_swapfile()
SWAP=/var/spool/swap
if [ "$(mobyplatform)" = "mac" ] || [ "$(mobyplatform)" = "windows" ] && [ ! -f $SWAP ]
then
mkdir -p "$(basename $SWAP)"
dd if=/dev/zero of=$SWAP bs=1k count=4090876
mkdir -p "$(dirname $SWAP)"
dd if=/dev/zero of=$SWAP bs=1k count=1048576
chmod 600 $SWAP
mkswap $SWAP
swapon $SWAP
@ -80,26 +114,27 @@ start()
DRIVE="/dev/${DEV}"
if fdisk -l "${DRIVE}" | grep -q "doesn't contain a valid partition table"
# see if it has a partition table already
if sfdisk -d "${DRIVE}" >/dev/null 2>/dev/null
then
do_mkfs "${DRIVE}"
else
DATA=$(fdisk -l "${DRIVE}" | grep 'Linux$' | head -1 | awk '{print $1}')
if [ -z "$DATA" ]
DATA=$(sfdisk -J "$DRIVE" | jq -e -r '.partitiontable.partitions | map(select(.type=="83")) | .[0].node')
if [ $? -eq 0 ]
then
do_mkfs "${DRIVE}"
do_fsck_extend_mount "$DRIVE" "$DATA" || do_mkfs "$DRIVE"
else
( do_fsck "${DATA}" && mount "${DATA}" /var ) || do_mkfs "${DRIVE}"
do_mkfs "$DRIVE"
fi
else
do_mkfs "$DRIVE"
fi
SWAP=$(fdisk -l "${DRIVE}" | grep 'Linux swap' | head -1 | awk '{print $1}')
[ -z "${SWAP}" ] && do_swapfile || swapon "${SWAP}"
# Use existing swap partition of present; we do not create one now
SWAP=$(fdisk -l "$DRIVE" | grep 'Linux swap' | head -1 | awk '{print $1}')
[ -z "$SWAP" ] && do_swapfile || swapon "$SWAP"
# boot2docker compat, has /var and /tmp on partition
[ -d /var/var/lib/boot2docker/ ] && mount --bind /var/var /var
# can remove when we run before bootmisc
[ -L /var/run ] || ln -s /run /var/run
[ -L /var/run ] || ln -s /run/lock /var/lock
@ -108,7 +143,7 @@ start()
[ -d /var/spool ] || mkdir -m 755 /var/spool
[ -d /var/tmp ] || mkdir -m 1777 /var/tmp
mount | grep -q "${DEV}. on /var type"
mount | grep -q ' on /var type '
eend $? "Failed to mount block device"
}