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Extract boot kernel from ramdisk image

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This commit is contained in:
Dean Troyer 2011-10-26 15:13:00 -05:00
parent 7920b0f757
commit e33c5f6327
1 changed files with 35 additions and 20 deletions
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55
tools/build_usb_boot.sh
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@ -1,17 +1,11 @@
#!/bin/bash -e #!/bin/bash -e
# build_usb_boot.sh - Create a syslinux boot environment # build_usb_boot.sh - Create a syslinux boot environment
# #
# build_usb_boot.sh [-k kernel-version] destdev # build_usb_boot.sh destdev
# #
# Assumes syslinux is installed # Assumes syslinux is installed
# Needs to run as root # Needs to run as root
KVER=`uname -r`
if [ "$1" = "-k" ]; then
KVER=$2
shift;shift
fi
DEST_DIR=${1:-/tmp/syslinux-boot} DEST_DIR=${1:-/tmp/syslinux-boot}
PXEDIR=${PXEDIR:-/var/cache/devstack/pxe} PXEDIR=${PXEDIR:-/var/cache/devstack/pxe}
OPWD=`pwd` OPWD=`pwd`
@ -20,7 +14,7 @@ PROGDIR=`dirname $0`
if [ -b $DEST_DIR ]; then if [ -b $DEST_DIR ]; then
# We have a block device, install syslinux and mount it # We have a block device, install syslinux and mount it
DEST_DEV=$DEST_DIR DEST_DEV=$DEST_DIR
DEST_DIR=`mktemp -d mntXXXXXX` DEST_DIR=`mktemp -d --tmpdir mntXXXXXX`
mount $DEST_DEV $DEST_DIR mount $DEST_DEV $DEST_DIR
if [ ! -d $DEST_DIR/syslinux ]; then if [ ! -d $DEST_DIR/syslinux ]; then
@ -57,20 +51,41 @@ mkdir -p $DEST_DIR/ubuntu
if [ ! -d $PXEDIR ]; then if [ ! -d $PXEDIR ]; then
mkdir -p $PXEDIR mkdir -p $PXEDIR
fi fi
if [ ! -r $PXEDIR/vmlinuz-${KVER} ]; then
sudo chmod 644 /boot/vmlinuz-${KVER} # Get image into place
if [ ! -r /boot/vmlinuz-${KVER} ]; then if [ ! -r $PXEDIR/stack-initrd.img ]; then
echo "No kernel found"
else
cp -p /boot/vmlinuz-${KVER} $PXEDIR
fi
fi
cp -p $PXEDIR/vmlinuz-${KVER} $DEST_DIR/ubuntu
if [ ! -r $PXEDIR/stack-initrd.gz ]; then
cd $OPWD cd $OPWD
sudo $PROGDIR/build_ramdisk.sh $PXEDIR/stack-initrd.gz $PROGDIR/build_ramdisk.sh $PXEDIR/stack-initrd.img
fi fi
cp -p $PXEDIR/stack-initrd.gz $DEST_DIR/ubuntu if [ ! -r $PXEDIR/stack-initrd.gz ]; then
gzip -1 -c $PXEDIR/stack-initrd.img >$PXEDIR/stack-initrd.gz
fi
#cp -p $PXEDIR/stack-initrd.gz $DEST_DIR/ubuntu
if [ ! -r $PXEDIR/vmlinuz-*-generic ]; then
MNTDIR=`mktemp -d --tmpdir mntXXXXXXXX`
mount -t ext4 -o loop $PXEDIR/stack-initrd.img $MNTDIR
if [ ! -r $MNTDIR/boot/vmlinuz-*-generic ]; then
echo "No kernel found"
umount $MNTDIR
rmdir $MNTDIR
if [ -n "$DEST_DEV" ]; then
umount $DEST_DIR
rmdir $DEST_DIR
fi
exit 1
else
cp -p $MNTDIR/boot/vmlinuz-*-generic $PXEDIR
fi
umount $MNTDIR
rmdir $MNTDIR
fi
# Get generic kernel version
KNAME=`basename $PXEDIR/vmlinuz-*-generic`
KVER=${KNAME#vmlinuz-}
cp -p $PXEDIR/vmlinuz-$KVER $DEST_DIR/ubuntu
cat >>$CFG <<EOF cat >>$CFG <<EOF
LABEL devstack LABEL devstack