VirtualBox VMs - autostarting on a headless Linux host

With some help from this and other blog posts I now have the Windows VM from my previous post set to auto-start.

Despite all the CLI and the manually edited scripts and config files, I'm finding this much easier (and more successful) than using KVM.

To start, I created a config file that will be used by the init.d scripts:



sudo nano /etc/default/virtualbox


Which contains the following entries (note - my VMs run as a user called vbox):
SHUTDOWN_USERS="vbox" # space-delimited list of users who might have runnings vms
SHUTDOWN=savestate # if any are found, suspend them to disk


I then created the script, which required a few modifications to refer to my local system:

#! /bin/sh
### BEGIN INIT INFO
# Provides:          virtualbox-subsonic-win
# Required-Start:    $local_fs $remote_fs vboxdrv vboxnet
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: subsonic-win virtual machine
# Description:       subsonic-win virtual machine hosted by VirtualBox
### END INIT INFO

# Author: Brendan Kidwell 
#
# Based on /etc/init.d/skeleton from Ubuntu 8.04. Updated for Ubuntu 9.10.
# If you are using Ubuntu <9.10, you might need to change "Default-Stop"
# above to "S 0 1 6".

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/sbin:/usr/bin:/sbin:/bin
DESC="subsonic-win virtual machine"
NAME=virtualbox-subsonic-win
SCRIPTNAME=/etc/init.d/$NAME

MANAGE_CMD=VBoxManage
VM_OWNER=vbox
VM_NAME="subsonic-win" #This has to be the name exactly as it appears in your VirtualBox GUI control panel.

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start()
{
        # Return
        #   0 if daemon has been started
        #   1 if daemon was already running
        #   2 if daemon could not be started

        sudo -H -u $VM_OWNER $MANAGE_CMD showvminfo "$VM_NAME"|grep "^State:\s*running" >/dev/null && {
            echo "$VM_NAME" is already running.
            return 1
        }

        sudo -H -u $VM_OWNER $MANAGE_CMD startvm "$VM_NAME" --type=headless >/dev/null || {
            echo Failed to start "$VM_NAME".
            return 2
        }

        echo "$VM_NAME" started or resumed.
        return 0
}

#
# Function that stops the daemon/service
#
do_stop()
{
        # Return
        #   0 if daemon has been stopped
        #   1 if daemon was already stopped
        #   2 if daemon could not be stopped
        #   other if a failure occurred

        sudo -H -u $VM_OWNER $MANAGE_CMD showvminfo "$VM_NAME"|grep "^State:\s*running" >/dev/null || {
            echo "$VM_NAME" is already stopped.
            return 1
        }

        sudo -H -u $VM_OWNER $MANAGE_CMD controlvm "$VM_NAME" savestate || {
            echo Failed to stop "$VM_NAME".
            return 2
        }

        echo "$VM_NAME" suspended.
        return 0
}

#
# Display "State" field from showinfo action
#
do_status()
{
        sudo -H -u $VM_OWNER $MANAGE_CMD showvminfo "$VM_NAME"|grep "^State:\s*.*$"
}

case "$1" in
  start)
        [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
        do_start
        case "$?" in
                0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
                2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
  stop)
        [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
        do_stop
        case "$?" in
                0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
                2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
  restart|force-reload)
        #
        # If the "reload" option is implemented then remove the
        # 'force-reload' alias
        #
        log_daemon_msg "Restarting $DESC" "$NAME"
        do_stop
        case "$?" in
          0|1)
                do_start
                case "$?" in
                        0) log_end_msg 0 ;;
                        1) log_end_msg 1 ;; # Old process is still running
                        *) log_end_msg 1 ;; # Failed to start
                esac
                ;;
          *)
                # Failed to stop
                log_end_msg 1
                ;;
        esac
        ;;
  status)
        do_status
        ;;
  *)
        #echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
        echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2
        exit 3
        ;;
esac


I used the following commands to test the script:
/etc/init.d/virtualbox-subsonic-win status # Is the VM running?
/etc/init.d/virtualbox-subsonic-win start  # Start the VM
/etc/inid.d/virtualbox-subsonic-win stop   # Stop the VM


Once satisfied, I added set it to run whenever I enter or leave multi-user mode:

sudo update-rc.d virtualbox-subsonic-win defaults

No comments:

Post a Comment