#!/bin/bash
 
 # This script is run by install_os_domU.sh
 #
 # Parameters:
 # - $GUEST_NAME - hostname for the DomU VM
 #
 # It modifies the ubuntu image created by install_os_domU.sh
 #
 # This script is responsible for cusomtizing the fresh ubuntu
 # image so on boot it runs the prepare_guest.sh script
 # that modifies the VM so it is ready to run stack.sh.
 # It does this by mounting the disk image of the VM.
 #
 # The resultant image is started by install_os_domU.sh,
 # and once the VM has shutdown, build_xva.sh is run
 
 set -o errexit

 set -o nounset

 set -o xtrace
 
 # This directory
 TOP_DIR=$(cd $(dirname "$0") && pwd)
 
 # Include onexit commands
 . $TOP_DIR/scripts/on_exit.sh
 
 # Source params - override xenrc params in your localrc to suite your taste
 source xenrc
 
 #
 # Parameters
 #
 GUEST_NAME="$1"
 
 # Mount the VDI
 STAGING_DIR=$($TOP_DIR/scripts/manage-vdi open $GUEST_NAME 0 1 | grep -o "/tmp/tmp.[[:alnum:]]*")
 add_on_exit "$TOP_DIR/scripts/manage-vdi close $GUEST_NAME 0 1"
 
 # Make sure we have a stage
 if [ ! -d $STAGING_DIR/etc ]; then
     echo "Stage is not properly set up!"
     exit 1
 fi
 

 # Copy XenServer tools deb into the VM
 ISO_DIR="/opt/xensource/packages/iso"
 XS_TOOLS_FILE_NAME="xs-tools.deb"
 XS_TOOLS_PATH="/root/$XS_TOOLS_FILE_NAME"
 if [ -e "$ISO_DIR" ]; then

     TOOLS_ISO=$(ls -1 $ISO_DIR/xs-tools-*.iso | head -1)

     TMP_DIR=/tmp/temp.$RANDOM
     mkdir -p $TMP_DIR
     mount -o loop $TOOLS_ISO $TMP_DIR
     DEB_FILE=$(ls $TMP_DIR/Linux/*amd64.deb)
     echo "Copying XenServer tools into VM from: $DEB_FILE"
     cp $DEB_FILE "${STAGING_DIR}${XS_TOOLS_PATH}"
     umount $TMP_DIR
     rm -rf $TMP_DIR
 else
     echo "WARNING: no XenServer tools found, falling back to 5.6 tools"

     TOOLS_URL="https://github.com/downloads/citrix-openstack/warehouse/xe-guest-utilities_5.6.100-651_amd64.deb"

     wget $TOOLS_URL -O $XS_TOOLS_FILE_NAME
     cp $XS_TOOLS_FILE_NAME "${STAGING_DIR}${XS_TOOLS_PATH}"
     rm -rf $XS_TOOLS_FILE_NAME
 fi
 

 # Copy prepare_guest.sh to VM
 mkdir -p $STAGING_DIR/opt/stack/
 cp $TOP_DIR/prepare_guest.sh $STAGING_DIR/opt/stack/prepare_guest.sh
 
 # backup rc.local
 cp $STAGING_DIR/etc/rc.local $STAGING_DIR/etc/rc.local.preparebackup
 
 # run prepare_guest.sh on boot
 cat <<EOF >$STAGING_DIR/etc/rc.local

 #!/bin/sh -e
 bash /opt/stack/prepare_guest.sh \\

     "$GUEST_PASSWORD" "$XS_TOOLS_PATH" "$STACK_USER" "$DOMZERO_USER" \\

     > /opt/stack/prepare_guest.log 2>&1

 EOF

 
 # Need to set barrier=0 to avoid a Xen bug
 # https://bugs.launchpad.net/ubuntu/+source/linux/+bug/824089
 sed -i -e 's/errors=/barrier=0,errors=/' $STAGING_DIR/etc/fstab