README.md

Xvfb configuration for Dockerfiles

Goes into /etc/init.d/xvfb

xvfb

#!/bin/bash
#
# Xvfb init script for Debian-based distros.
#
# The display number used must match the DISPLAY environment variable used
# for other applications that will use Xvfb. e.g. ':10'.
#
# From: https://github.com/gmonfort/xvfb-init/blob/master/Xvfb
#
### BEGIN INIT INFO
# Provides:          xvfb
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start/stop custom Xvfb
# Description:       Enable service provided by xvfb
### END INIT INFO
 
NAME=Xvfb
DESC="$NAME - X Virtual Frame Buffer"
SCRIPTNAME=/etc/init.d/$NAME
XVFB=/usr/bin/Xvfb
PIDFILE=/var/run/${NAME}.pid
 
# Using -extension RANDR doesn't seem to work anymore. Firefox complains
# about not finding extension RANDR whether or not you include it here.
# Fortunately this is a non-fatal warning and doesn't stop Firefox from working.
XVFB_ARGS=":10 -extension RANDR -noreset -ac -screen 10 1024x768x16"
 
set -e
 
if [ `id -u` -ne 0 ]; then
  echo "You need root privileges to run this script"
  exit 1
fi
 
[ -x $XVFB ] || exit 0
 
. /lib/lsb/init-functions
 
[ -r /etc/default/Xvfb ] && . /etc/default/Xvfb
 
case "$1" in
  start)
    log_daemon_msg "Starting $DESC" "$NAME"
    if start-stop-daemon --start --quiet --oknodo --pidfile $PIDFILE 
          --background --make-pidfile --exec $XVFB -- $XVFB_ARGS ; then
      log_end_msg 0
    else
      log_end_msg 1
    fi
    log_end_msg $?
    ;;
 
  stop)
    log_daemon_msg "Stopping $DESC" "$NAME"
    start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE --retry 5
    if [ $? -eq 0 ] && [ -f $PIDFILE ]; then
      /bin/rm -rf $PIDFILE
    fi
    log_end_msg $?
    ;;
 
  restart|force-reload)
    log_daemon_msg "Restarting $DESC" "$NAME"
    $0 stop && sleep 2 && $0 start
    ;;
 
  status)
    status_of_proc -p $PIDFILE $XVFB $NAME && exit 0 || exit $?
    ;;
 
  *)
    log_action_msg "Usage: ${SCRIPTNAME} {start|stop|status|restart|force-reload}"
    exit 2
    ;;
esac
exit 0