Merge pull request #143 from cloudbuilders/fix_races
Fix NBD race conditions
This commit is contained in:
Jesse Andrews
commit
037d3bdea4
5 changed files with 227 additions and 69 deletions
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@ -12,6 +12,27 @@ if [ ! "oneiric" = "$UBUNTU_VERSION" ]; then
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fi
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fi
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# Clean up any resources that may be in use
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cleanup() {
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set +o errexit
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unmount_images
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if [ -n "$ROOTFS" ]; then
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umount $ROOTFS/dev
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umount $ROOTFS
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fi
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# Release NBD devices
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if [ -n "$NBD" ]; then
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qemu-nbd -d $NBD
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fi
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# Kill ourselves to signal any calling process
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trap 2; kill -2 $$
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}
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trap cleanup SIGHUP SIGINT SIGTERM
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# Echo commands
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set -o xtrace
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@ -100,9 +121,6 @@ function kill_unmount() {
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# Install deps if needed
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dpkg -l kvm libvirt-bin kpartx || apt-get install -y --force-yes kvm libvirt-bin kpartx
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# Let Ctrl-c kill tail and exit
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trap kill_unmount SIGINT
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# Where Openstack code will live in image
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DEST=${DEST:-/opt/stack}
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@ -239,15 +257,16 @@ rm -f $VM_DIR/disk
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# Create our instance fs
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qemu-img create -f qcow2 -b $VM_IMAGE disk
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# Make sure we have nbd-ness
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modprobe nbd max_part=63
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# Set up nbd
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# Finds the next available NBD device
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# Exits script if error connecting or none free
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# map_nbd image
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# returns full nbd device path
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function map_nbd {
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for i in `seq 0 15`; do
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if [ ! -e /sys/block/nbd$i/pid ]; then
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NBD=/dev/nbd$i
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# Connect to nbd and wait till it is ready
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qemu-nbd -c $NBD disk
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qemu-nbd -c $NBD $1
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if ! timeout 60 sh -c "while ! [ -e ${NBD}p1 ]; do sleep 1; done"; then
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echo "Couldn't connect $NBD"
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exit 1
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@ -259,6 +278,14 @@ if [ -z "$NBD" ]; then
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echo "No free NBD slots"
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exit 1
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fi
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echo $NBD
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}
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# Make sure we have nbd-ness
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modprobe nbd max_part=63
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# Set up nbd
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NBD=`map_nbd disk`
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NBD_DEV=`basename $NBD`
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# Mount the instance
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@ -381,7 +408,9 @@ sed -e 's/^PasswordAuthentication.*$/PasswordAuthentication yes/' -i $ROOTFS/etc
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# Unmount
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umount $ROOTFS || echo 'ok'
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ROOTFS=""
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qemu-nbd -d $NBD
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NBD=""
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# Create the instance
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cd $VM_DIR && virsh create libvirt.xml
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@ -11,6 +11,22 @@ PXEDIR=${PXEDIR:-/var/cache/devstack/pxe}
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OPWD=`pwd`
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PROGDIR=`dirname $0`
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# Clean up any resources that may be in use
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cleanup() {
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set +o errexit
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# Mop up temporary files
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if [ -n "$MNTDIR" -a -d "$MNTDIR" ]; then
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umount $MNTDIR
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rmdir $MNTDIR
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fi
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# Kill ourselves to signal any calling process
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trap 2; kill -2 $$
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}
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trap cleanup SIGHUP SIGINT SIGTERM
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mkdir -p $DEST_DIR/pxelinux.cfg
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cd $DEST_DIR
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for i in memdisk menu.c32 pxelinux.0; do
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@ -1,55 +1,114 @@
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#!/bin/bash
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# build_ramdisk.sh - Build RAM disk images
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# exit on error to stop unexpected errors
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set -o errexit
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if [ ! "$#" -eq "1" ]; then
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echo "$0 builds a gziped natty openstack install"
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echo "$0 builds a gziped Ubuntu OpenStack install"
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echo "usage: $0 dest"
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exit 1
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fi
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# Clean up any resources that may be in use
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cleanup() {
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set +o errexit
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# Mop up temporary files
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if [ -n "$MNTDIR" -a -d "$MNTDIR" ]; then
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umount $MNTDIR
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rmdir $MNTDIR
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fi
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if [ -n "$DEV_FILE_TMP" -a -e "$DEV_FILE_TMP "]; then
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rm -f $DEV_FILE_TMP
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fi
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if [ -n "$IMG_FILE_TMP" -a -e "$IMG_FILE_TMP" ]; then
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rm -f $IMG_FILE_TMP
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fi
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# Release NBD devices
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if [ -n "$NBD" ]; then
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qemu-nbd -d $NBD
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fi
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# Kill ourselves to signal any calling process
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trap 2; kill -2 $$
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}
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trap cleanup SIGHUP SIGINT SIGTERM
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# Set up nbd
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modprobe nbd max_part=63
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# Echo commands
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set -o xtrace
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IMG_FILE=$1
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PROGDIR=`dirname $0`
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CHROOTCACHE=${CHROOTCACHE:-/var/cache/devstack}
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# Source params
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source ./stackrc
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# Keep track of the current directory
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TOOLS_DIR=$(cd $(dirname "$0") && pwd)
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TOP_DIR=`cd $TOOLS_DIR/..; pwd`
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# Store cwd
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CWD=`pwd`
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cd $TOP_DIR
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# Source params
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source ./stackrc
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CACHEDIR=${CACHEDIR:-/var/cache/devstack}
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DEST=${DEST:-/opt/stack}
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# Configure the root password of the vm to be the same as ``ADMIN_PASSWORD``
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ROOT_PASSWORD=${ADMIN_PASSWORD:-password}
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# Base image (natty by default)
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DIST_NAME=${DIST_NAME:-natty}
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# Param string to pass to stack.sh. Like "EC2_DMZ_HOST=192.168.1.1 MYSQL_USER=nova"
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STACKSH_PARAMS=${STACKSH_PARAMS:-}
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# Option to use the version of devstack on which we are currently working
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USE_CURRENT_DEVSTACK=${USE_CURRENT_DEVSTACK:-1}
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# Set up nbd
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modprobe nbd max_part=63
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NBD=${NBD:-/dev/nbd9}
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NBD_DEV=`basename $NBD`
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# clean install of natty
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if [ ! -r $CHROOTCACHE/natty-base.img ]; then
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$PROGDIR/get_uec_image.sh natty $CHROOTCACHE/natty-base.img
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# # copy kernel modules...
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# # NOTE(ja): is there a better way to do this?
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# cp -pr /lib/modules/`uname -r` $CHROOTCACHE/natty-base/lib/modules
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# # a simple password - pass
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# echo root:pass | chroot $CHROOTCACHE/natty-base chpasswd
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# clean install
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if [ ! -r $CACHEDIR/$DIST_NAME-base.img ]; then
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$TOOLS_DIR/get_uec_image.sh $DIST_NAME $CACHEDIR/$DIST_NAME-base.img
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fi
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# prime natty with as many apt/pips as we can
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if [ ! -r $CHROOTCACHE/natty-dev.img ]; then
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cp -p $CHROOTCACHE/natty-base.img $CHROOTCACHE/natty-dev.img
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qemu-nbd -c $NBD $CHROOTCACHE/natty-dev.img
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if ! timeout 60 sh -c "while ! [ -e /sys/block/$NBD_DEV/pid ]; do sleep 1; done"; then
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# Finds the next available NBD device
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# Exits script if error connecting or none free
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# map_nbd image
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# returns full nbd device path
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function map_nbd {
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for i in `seq 0 15`; do
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if [ ! -e /sys/block/nbd$i/pid ]; then
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NBD=/dev/nbd$i
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# Connect to nbd and wait till it is ready
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qemu-nbd -c $NBD $1
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if ! timeout 60 sh -c "while ! [ -e ${NBD}p1 ]; do sleep 1; done"; then
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echo "Couldn't connect $NBD"
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exit 1
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fi
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break
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fi
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done
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if [ -z "$NBD" ]; then
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echo "No free NBD slots"
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exit 1
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fi
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echo $NBD
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}
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# prime image with as many apt/pips as we can
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DEV_FILE=$CACHEDIR/$DIST_NAME-dev.img
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DEV_FILE_TMP=`mktemp $DEV_FILE.XXXXXX`
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if [ ! -r $DEV_FILE ]; then
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cp -p $CACHEDIR/$DIST_NAME-base.img $DEV_FILE_TMP
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NBD=`map_nbd $DEV_FILE_TMP`
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MNTDIR=`mktemp -d --tmpdir mntXXXXXXXX`
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mount -t ext4 ${NBD}p1 $MNTDIR
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cp -p /etc/resolv.conf $MNTDIR/etc/resolv.conf
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@ -66,6 +125,7 @@ if [ ! -r $CHROOTCACHE/natty-dev.img ]; then
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# a simple password - pass
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echo stack:pass | chroot $MNTDIR chpasswd
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echo root:$ROOT_PASSWORD | chroot $MNTDIR chpasswd
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# and has sudo ability (in the future this should be limited to only what
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# stack requires)
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@ -74,27 +134,31 @@ if [ ! -r $CHROOTCACHE/natty-dev.img ]; then
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umount $MNTDIR
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rmdir $MNTDIR
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qemu-nbd -d $NBD
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NBD=""
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mv $DEV_FILE_TMP $DEV_FILE
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fi
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rm -f $DEV_FILE_TMP
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# clone git repositories onto the system
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# ======================================
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IMG_FILE_TMP=`mktemp $IMG_FILE.XXXXXX`
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if [ ! -r $IMG_FILE ]; then
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qemu-nbd -c $NBD $CHROOTCACHE/natty-dev.img
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if ! timeout 60 sh -c "while ! [ -e ${NBD}p1 ]; do sleep 1; done"; then
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echo "Couldn't connect $NBD"
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exit 1
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fi
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NBD=`map_nbd $DEV_FILE`
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# Pre-create the image file
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# FIXME(dt): This should really get the partition size to
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# pre-create the image file
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dd if=/dev/zero of=$IMG_FILE bs=1 count=1 seek=$((2*1024*1024*1024))
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dd if=/dev/zero of=$IMG_FILE_TMP bs=1 count=1 seek=$((2*1024*1024*1024))
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# Create filesystem image for RAM disk
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dd if=${NBD}p1 of=$IMG_FILE bs=1M
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dd if=${NBD}p1 of=$IMG_FILE_TMP bs=1M
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qemu-nbd -d $NBD
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NBD=""
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mv $IMG_FILE_TMP $IMG_FILE
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fi
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rm -f $IMG_FILE_TMP
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MNTDIR=`mktemp -d --tmpdir mntXXXXXXXX`
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mount -t ext4 -o loop $IMG_FILE $MNTDIR
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@ -11,6 +11,26 @@ PXEDIR=${PXEDIR:-/var/cache/devstack/pxe}
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OPWD=`pwd`
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PROGDIR=`dirname $0`
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# Clean up any resources that may be in use
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cleanup() {
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set +o errexit
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# Mop up temporary files
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if [ -n "$DEST_DEV" ]; then
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umount $DEST_DIR
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rmdir $DEST_DIR
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fi
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if [ -n "$MNTDIR" -a -d "$MNTDIR" ]; then
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umount $MNTDIR
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rmdir $MNTDIR
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fi
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# Kill ourselves to signal any calling process
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trap 2; kill -2 $$
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}
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trap cleanup SIGHUP SIGINT SIGTERM
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if [ -b $DEST_DIR ]; then
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# We have a block device, install syslinux and mount it
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DEST_DEV=$DEST_DIR
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@ -26,6 +26,24 @@ usage() {
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exit 1
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}
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# Clean up any resources that may be in use
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cleanup() {
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set +o errexit
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# Mop up temporary files
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if [ -n "$IMG_FILE_TMP" -a -e "$IMG_FILE_TMP" ]; then
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rm -f $IMG_FILE_TMP
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fi
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# Release NBD devices
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if [ -n "$NBD" ]; then
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qemu-nbd -d $NBD
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fi
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# Kill ourselves to signal any calling process
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trap 2; kill -2 $$
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}
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while getopts f:hmr: c; do
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case $c in
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f) FORMAT=$OPTARG
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@ -89,6 +107,8 @@ case $DIST_NAME in
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;;
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esac
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trap cleanup SIGHUP SIGINT SIGTERM
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# Prepare the base image
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# Get the UEC image
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@ -111,13 +131,16 @@ if [ $ROOTSIZE -gt 2000 ]; then
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qemu-img resize $IMG_FILE_TMP +$((ROOTSIZE - 2000))M
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fi
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# Set up nbd
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modprobe nbd max_part=63
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for i in `seq 1 15`; do
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# Finds the next available NBD device
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# Exits script if error connecting or none free
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# map_nbd image
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# returns full nbd device path
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function map_nbd {
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for i in `seq 0 15`; do
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if [ ! -e /sys/block/nbd$i/pid ]; then
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NBD=/dev/nbd$i
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# Connect to nbd and wait till it is ready
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qemu-nbd -c $NBD $IMG_FILE_TMP
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qemu-nbd -c $NBD $1
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if ! timeout 60 sh -c "while ! [ -e ${NBD}p1 ]; do sleep 1; done"; then
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echo "Couldn't connect $NBD"
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exit 1
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@ -129,7 +152,12 @@ if [ -z "$NBD" ]; then
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echo "No free NBD slots"
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exit 1
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fi
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NBD_DEV=`basename $NBD`
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echo $NBD
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}
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# Set up nbd
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modprobe nbd max_part=63
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NBD=`map_nbd $IMG_FILE_TMP`
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# Resize partition 1 to full size of the disk image
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echo "d
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@ -162,5 +190,6 @@ rm -f $MNTDIR/etc/resolv.conf
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umount $MNTDIR
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rmdir $MNTDIR
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qemu-nbd -d $NBD
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NBD=""
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mv $IMG_FILE_TMP $IMG_FILE
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